| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D000219.1 | SGP/SONDE/C1 - Incorrect surface temperature | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D000308.1 | SGP/SONDE - Questionable absolute pressures | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D000308.2 | SGP/SONDE - Questionable absolute pressures | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D000319.1 | SGP/SONDE - Data missing from sounding | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D000625.1 | SGP/SONDE/C1 - Operator used wrong calibration tape | sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D000801.2 | SGP/SONDE/C1 - Incorrect absolute pressure | sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D001107.1 | SGP/SONDE/C1 - Incorrect surface temperature | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D940804.1 | Possible error in humidity ground check | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D941104.1 | Bad surface RH value in sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D941108.2 | Bad surface RH value in sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D941108.4 | CF Sonde Ground Check Corrections | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D941213.1 | Questionable initial values sounding 941209:1133 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D950109.1 | Questionable surface value 1/2/95 11:32 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D950109.2 | Questionable surface value 1/3/95 11:29 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D950304.1 | Reprocess: Sounding 950222:0530 done in research mode | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D950310.1 | Bad surface values in sounding 3/9/95:0530 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D950316.1 | Reprocess: Sounding 950315:1429 done in research mode | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D950417.1 | Reprocess: Sounding 950413:1130 done in research mode | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D950419.1 | Bad surface values in sounding 4/17/95 14:29 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D950722.1 | Reprocess: Sounding done in research mode | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D950722.2 | Reprocess: Sounding done in research mode | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D950723.1 | Reprocess: Sounding done in research mode | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D950815.4 | SGP/SONDE/B1 - Reprocess: sonde RESEARCH mode altitudes biased low | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D950816.5 | bad surface tdry value in sounding 17:55 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D951006.1 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D951006.2 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D951006.3 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D951006.4 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D951006.5 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D951006.6 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960122.1 | Jump in pressure value upon launch | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960122.2 | Jump in pressure value upon launch | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960129.1 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960202.2 | bad pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960221.1 | signal interruption | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D960223.1 | Incorrect surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960223.2 | Incorrect surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960229.1 | SGP/SONDE/B5 - incorrect factory RH calib-radiosondes | sgpsondewrpnB5.a0, sgpsondewrpnB5.a1 |
| D960229.2 | SGP/SONDE/C1 - incorrect factory RH calib-radiosondes | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960229.3 | SGP/SONDE/B1 - incorrect factory RH calib-radiosondes | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D960403.1 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960415.1 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960506.1 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960602.2 | bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960611.3 | bad surface values sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960701.4 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960706.1 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960806.1 | Bad surface pressure sounding | sgpsondewrpnB5.a0, sgpsondewrpnB5.a1 |
| D960807.1 | Questionable surface pressure sounding | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D960809.1 | Questionable surface pressure sounding | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D960913.1 | bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960913.2 | bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960913.3 | bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960913.5 | bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D960927.2 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D970111.1 | Incorrect surface temperature | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D970318.1 | Incorrect surface pressure | sgpsondewrpnB5.a1 |
| D970318.2 | Questionable RH | sgpsondewrpnC1.a1 |
| D970410.5 | Reprocess: Jump in pressure value | sgpsondewrpnB5.a1 |
| D970507.2 | Jump in pressure value | sgpsondewrpnC1.a1 |
| D970507.3 | Corrupted and missing data | sgpsondewrpnB5.a1 |
| D970624.2 | Incorrect surface values | sgpsondewrpnC1.a1 |
| D970625.1 | Bad sounding file CF 970622:0228 | sgpsondewrpnC1.a1 |
| D970709.1 | Bad pressure values CF sounding 970704:0525 | sgpsondewrpnC1.a1 |
| D970710.1 | Questionable pressure/altitude data | sgpsondewrpnC1.a1 |
| D970717.1 | possible telemetry interference/interpolated data | sgpsondewrpnB5.a1 |
| D970717.2 | Pressure jump at launch | sgpsondewrpnB5.a1 |
| D970923.1 | Pressure jump at launch | sgpsondewrpnB5.a1 |
| D970923.2 | Pressure jump at launch | sgpsondewrpnC1.a1 |
| D970930.1 | Pressure jump at launch | sgpsondewrpnB1.a1 |
| D971007.3 | Bad pressure absolute pressure values | sgpsondewrpnB5.a1 |
| D980126.1 | Incorrect radiosonde serial numbers | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D980126.10 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.11 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.18 | Telemetry interference | sgpsondewrpnB5.a0, sgpsondewrpnB5.a1 |
| D980126.2 | Incorrect surface temperature and humidity | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D980126.3 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.4 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.5 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.6 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.7 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.8 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.9 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980127.3 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980128.2 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980506.1 | Incorrect surface values | sgpsondewrpnC1.a1 |
| D980507.4 | Incorrect surface pressure | sgpsondewrpnC1.a1 |
| D980511.2 | Incorrect surface pressure | sgpsondewrpnC1.a1 |
| D980517.1 | Pressure jump at launch | sgpsondewrpnB1.a1 |
| D980716.1 | Bad sounding | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D980917.1 | Incorrect surface readings | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D980917.2 | Incorrect surface RH | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D990124.2 | SGP/SONDE - Dry bias in sonde RH | DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, sgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0, sgpsondeB4.a1, sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00, sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondeptuC1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0, sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1, sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00, sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0, sgpsondewrprB4.a1, sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00, sgpsondewrprC1.a0, sgpsondewrprC1.a1 |
| D990201.1 | SGP/SONDE - Incorrect surface pressure | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D990210.1 | SGP/SONDE - Wrong cal tape | sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D990303.1 | SGP/SONDE - Pressure jump at launch | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D990304.1 | SGP/SONDE - Pressure jump at launch/incorrect surface values | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D990329.1 | Incorrect surface RH | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D990513.1 | SGP/SONDE - RH probably biased low in several soundings | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D991221.1 | SGP/SONDE - Incorrect surface temperature | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D991228.1 | SGP/SONDE - Incorrect surface temperature | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/17/2000 | 2330 | 02/17/2000 | 2330 |
| Subject: | SGP/SONDE/C1 - Incorrect surface temperature |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | It appears as if the operator mis-typed the temperature when entering the surface values into the system. The value appears as 89.0 degC instead of 8.9 degC. Also note that there are no RH data in this sounding other than the initial value of 100%. The reason for this loss of RH is unknown. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/03/2000 | 2328 | 03/04/2000 | 0051 |
| Subject: | SGP/SONDE - Questionable absolute pressures |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | The sonde surface pressure reading was considerably higher than the corresponding THWAPS pressure (988.0 hPa vs 982.3 hPa). The sonde readings are consistent during the sounding, however, suggesting that this is not a case of a pressure jump at launch but one of sensor offset. This problem will only affect those who use the absolute pressure values. The file altitudes, which are based on the relative pressure changes from the surface, should be fine. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/04/2000 | 0229 | 03/04/2000 | 0359 |
| Subject: | SGP/SONDE - Questionable absolute pressures |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | The sonde surface pressure reading was considerably higher than the corresponding THWAPS pressure (992.9 hPa vs 983.0 hPa). The sonde readings are consistent during the sounding, however, suggesting that this is not a case of a pressure jump at launch but one of sensor offset. This problem will only affect those who use the absolute pressure values. The file altitudes, which are based on the relative pressure changes from the surface, should be fine. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/16/2000 | 2042 | 03/16/2000 | 2143 |
| Subject: | SGP/SONDE - Data missing from sounding |
| DataStreams: | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | It appears that the collection of the raw data file was interupted by the SDS. The following message appears in the raw file (sonde-hills10003161901.rawraw): 12 0 4.8 4384 589.3 -11.0 87 -12.7 274 12.8 110001110110 #Collection process shut down by SIGTERM Another raw file (sonde-hills10003162145.raw) follows with: ~LL? 73 30 4.7 22154 37.9 -63.4 1 -93.3 250 13.2 110001110110 I don't understand the cause of this problem, but am confident that it is not instrument related. These files were merged on ingest. |
| Measurements: | sgpsondewrpnB1.00:
sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/23/2000 | 2330 | 06/24/2000 | 0100 |
| Subject: | SGP/SONDE/C1 - Operator used wrong calibration tape |
| DataStreams: | sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | It appears as if the operators had a problem with the original sounding and launched a second radiosonde. Apparently they used the calibration tape that came with the first radiosonde (serial number 943156405) in place of the one that was correct for the second radiosonde (sn 943156406) and all the data are bad after the first sample (surface values). |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondeC1.a0:
sgpsondewrpnC1.00:
sgpsondewndcalcC1.c1:
sgpsondeC1.a1:
sgpsondeC1.00:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/25/2000 | 0533 | 07/25/2000 | 0724 |
| Subject: | SGP/SONDE/C1 - Incorrect absolute pressure |
| DataStreams: | sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | The surface pressure (983.5 hPa) reported by this radiosonde (sn 94315713) is substantially higher than that reported by the THWAPS (~977) or by the sondes used in the previous and following soundings (976.6, 977.3). This may be a calibration problem or a mechanic problem on launch. The pressure values reported in the remainder of the sounding are consistent with the reported surface pressure, so the altitudes should be correct. The absolute pressure values may be high by about 5 hPa. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewndcalcC1.c1:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/03/2000 | 2030 | 11/03/2000 | 2030 |
| Subject: | SGP/SONDE/C1 - Incorrect surface temperature |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | The value for air temperature at the surface in this file is 23.3 degC. This value is too high and resulted from incorrect data entry (typographic mistake) by the operator. The true value as determined from the operator pre-launch logs is 12.3 degC. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/13/1994 | 1131 | 08/03/1994 | 1430 |
| Subject: | Possible error in humidity ground check |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondewrpnC1
Subject: Possible error in humidity ground check
Date Submitted: 8/3/94
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement:
What level data: (raw,a0,a1,b1,c1 etc): raw, a0, a1
What location was the data collected at: CF
Period of time in question
Begin Date 7/13/94 Time 11:31 (GMT)
End Date 8/ 3/94 Time 14:30 (GMT)
Data should be labeled:
_X_ questionable ___ All data fields affected
___ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
We suspect that the dessicant in the bbss ground check set (located
only at the central facility) has become saturated and is no longer
providing a 0 %RH environment against which to check the sonde RH sensor.
This would result in a bias in the correction for humidity for
those soundings that were done during the time the dessicant was bad.
Examination of the data suggests that the potential errors are small,
(on the order of a few percent RH), but sufficiently different from previous
corrections to warrant temporary suspension of the ground check procedure.
A review of the data collected since the beginning of the year shows no
trend in humidity correction until July 13, 1994. The last positive
humidity correction was recorded on July 12, 1994 and since then has been
noticably (though slightly) downward.
The humidity correction is applied linearly. That is, U = U' + (Uo - Uo')
where U is the humidity with the ground check applied (this is the RH
value in our data stream), U' is the humidity measured at the sonde before
correction, Uo is the reference humidity (assumed to be 0%), and Uo' is
is the humidity measured by the sonde in the ground check set. Users
can recover the RH measured at the sonde by subtracing the global attribute
"humidity-correction" from the RH values in the data set. Based on our
experience with the ground check data, we expect the RH values measured
at the sonde to be accurate within +/-2% RH.
Other observations/measurements impacted by this problem:
Any measurement derived from the sonde RH measurement, for example
dew point temperature, water vapor mixing ratio).
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data warning user that RH may be biased high by an unknown amount,
probably not exceeding 2% RH.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/30/1994 | 2326 | 10/30/1994 | 2326 |
| Subject: | Bad surface RH value in sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: SGPSONDEC1
Subject: Bad surface RH value in sounding 10/30/94 23:26
Date Submitted: 11/4/94
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: All
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 10/30/94 Time 23:26 (GMT)
End Date 10/30/94 Time 23:26 (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
It looks as though an incorrect value was entered by the operator for
surface relative humidity. The value entered 16% is much lower than the
first value given by the radiosonde 80%. The rest of the sounding is
consistent with humid, rainy conditions, suggesting a typographical
error (16 instead of 76?).
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/06/1994 | 1733 | 11/06/1994 | 1733 |
| Subject: | Bad surface RH value in sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: SGPSONDEC1
Subject: Bad surface RH value in sounding 11/6/94 17:33
Date Submitted: 11/8/94
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: All
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 11/06/94 Time 17:33 (GMT)
End Date 11/06/94 Time 17:33 (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
An incorrect value was entered by the operator for surface relative humidity.
The value as entered as 4% should be 45%. This typographical error was
noted in the site operations log by the operator shortly after it occurred.
The remaining values in the sounding should be fine.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/21/1993 | 1640 | 08/03/1994 | 1430 |
| Subject: | CF Sonde Ground Check Corrections |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: SGPSONDEC1
Subject: CF Sonde Ground Check Corrections
Date Submitted: 11/8/94
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondec1
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 01/21/93 Time 16:40 (GMT)
End Date 08/03/94 Time 14:30 (GMT)
Data should be labeled:
_?_ questionable ___ All data fields affected
___ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
Between 1/21/93 and 8/3/94 all radiosondes launched from the central
facility were ground checked before launch. The ground check procedure
consists of placing the sonde sensor arm into a sealed, dessicated chamber
containing a certified calibrated mercury thermometer, allowing the sonde
to equilibrate, and comparing the sonde output readings for RH and
temperature to the thermometer reading and an assumed 0% RH. All data after
launch were "corrected" to account for any differences between the sonde
output and the reference conditions in the ground check set.
Analysis of the population of ground check values shows that the average
RH correction was 0% RH and average temperature correction was -0.4 degC.
Because there is some question as to whether applying the ground check
correction increases or decreases the accuracy of the output data, some
investigators may wish to remove the effect of the ground check before
using the data in their analyses. Ground checks were suspended on 8/3/94.
The algorithms for removing the ground check are:
RH (without ground check) = RH (as reported) - humidity_correction
Temp (without ground chk) = [Temp (as reported) - FACTOR1]/FACTOR2 where
FACTOR1 = [(90*temperature_correction)/(tref+90)
FACOTR2 = [1+(temperature_correction)/(tref+90)
The variables "humidity_correction" and "temperature_correction" are
metadata contained in the netCDF data files from 5/20/93 to 8/3/94.
Between 1/21/93 and 5/20/93 these variables were misnamed and are not
easily accessible via FORTRAN (see PIF 940917.1).
The variable tref is the actual temperature reported by the radiosonde
while in the ground check set. This variable is not included in the
netCDF file and can be estimated by using a value of 15 degC. The
correction function is relatively insensitive to variations in this
value. (see PIF 940917.2)
FORTRAN routines for reading the metadata and for applying the algorithms
to produce "uncorrected" data are available from the instrument mentor.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Send (another) notice to users of the data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/09/1994 | 1133 | 12/09/1994 | 1133 |
| Subject: | Questionable initial values sounding 941209:1133 |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondec1
Subject: Questionable initial values sounding 941209:1133
Date Submitted: 12/12/94
Submitted By: Barry Lesht _x_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: All
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 12/09/94 Time 11:33:00 (GMT)
End Date 12/09/94 Time 11:33:02 (GMT)
Data should be labeled:
_x_ questionable ___ All data fields affected
___ incorrect _x_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
It appears that incorrect values were entered for surface temperature and
relative humidity in the subject sounding. The values entered were
temp = 25.1 degC, rh = 18 %. The next values in the sounding are
temp =- 2.4 degC, rh = 70 %. Because these do not appear to be simple
typographical errors, the values should be noted as questionable rather
than incorrect until the paper log can be consulted by site ops.
Initial values for subsequent soundings seem fine.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Check paper log and flag data. Note for possible correction later.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/02/1995 | 1132 | 01/02/1995 | 1132 |
| Subject: | Questionable surface value 1/2/95 11:32 |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondec1wrpn
Subject: Questionable surface value 1/2/95 11:32
Date Submitted: 1/9/95
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondec1
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: cf
Period of time in question
Begin Date 1/02/95 Time 11:32:00 (GMT)
End Date 1/02/95 Time 11:32:02 (GMT)
Data should be labeled:
_x_ questionable ___ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
It appears that incorrect surface values of temperature and relative
humidity were entered for the subject sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/03/1995 | 1129 | 01/03/1995 | 1129 |
| Subject: | Questionable surface value 1/3/95 11:29 |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondec1wrpn
Subject: Questionable surface value 1/3/95 11:29
Date Submitted: 1/9/95
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondec1
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: cf
Period of time in question
Begin Date 1/03/95 Time 11:29:00 (GMT)
End Date 1/03/95 Time 11:29:02 (GMT)
Data should be labeled:
_x_ questionable ___ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
It appears that incorrect surface values of temperature and relative
humidity were entered for the subject sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/22/1995 | 0530 | 02/22/1995 | 0730 |
| Subject: | Reprocess: Sounding 950222:0530 done in research mode |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform:
Subject: Sounding 950222:0530 Done in Research Mode
Date Submitted: 3/4/95
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: SGPSONDEC1
What level data: (raw,a0,a1,b1,c1 etc): ALL
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 2/22/95 Time 05:30 (GMT)
End Date 2/22/95 Time 07:30 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
_X_ others
Discussion of Problem: This sounding was done in RESEARCH mode for
both thermodynamic as well as wind data. The
normal mode is to for RESEARCH winds only. As
a result, both the ascending and descending
flights of the sonde are included in the data
file and none of the data are smoothed or
filtered.
Other observations/measurements impacted by this problem: I think that
some of the radiation codes that use the sonde
data as input don't handle the descending samples
well. I'm not sure which ones may be affected.
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.) Users should be notified and,
if (and only if) requested, the sounding could be reprocessed either using
the software developed at the EC or the digi-CORA.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/09/1995 | 0530 | 03/09/1995 | 0530 |
| Subject: | Bad surface values in sounding 3/9/95:0530 |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface values in sounding 3/9/95:0530
Date Submitted: 3/10/95
Submitted By: _x_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement:
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: sgp/cf
Period of time in question
Begin Date 3/09/95 Time 05:30 (GMT)
End Date 3/09/95 Time 05:30 (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_x_ incorrect _x_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem: It appears that the operator entered incorrect
values for the surface temperature and humidity for this sounding. The
entered values are 24.8 degC (temp) and 19 %RH (humidity) which are most
likely the values obtained from the met instruments inside the trailer
rather from the sonde on the launch platfrom. The next sample values of
-3.1 degC (temp) and 81 %RH (humidity) appear to be valid.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/15/1995 | 1429 | 03/15/1995 | 1629 |
| Subject: | Reprocess: Sounding 950315:1429 done in research mode |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | P950316.1 Barry Lesht
SGP/SONDE.C1.950315.950315 - Sounding 950315:1429 Done in Research Mode
DQR No: Platform:
Subject: Sounding 950315:1429 Done in Research Mode
Date Submitted: 3/4/95
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: SGPSONDEC1
What level data: (raw,a0,a1,b1,c1 etc): ALL
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 3/15/95 Time 14:29 (GMT)
End Date 3/15/95 Time 16:29 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
_X_ others
Discussion of Problem: This sounding was done in RESEARCH mode for
both thermodynamic as well as wind data. The
normal mode is to for RESEARCH winds only. As
a result, both the ascending and descending
flights of the sonde are included in the data
file and none of the data are smoothed or
filtered.
Other observations/measurements impacted by this problem: I think that
some of the radiation codes that use the sonde
data as input don't handle the descending samples
well. I'm not sure which ones may be affected.
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.) Users should be notified and,
if (and only if) requested, the sounding could be reprocessed either using
the software developed at the EC or the digi-CORA.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/13/1995 | 1130 | 04/13/1995 | 1330 |
| Subject: | Reprocess: Sounding 950413:1130 done in research mode |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform:
Subject: Sounding 950413:1130 Done in Research Mode
Date Submitted: 4/17/95
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: SGPSONDEC1
What level data: (raw,a0,a1,b1,c1 etc): ALL
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 4/13/95 Time 11:30 (GMT)
End Date 4/13/95 Time 13:30 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
_X_ others
Discussion of Problem: This sounding was done in RESEARCH mode for
both thermodynamic as well as wind data. The
normal mode is to for RESEARCH winds only. As
a result, both the ascending and descending
flights of the sonde are included in the data
file and none of the data are smoothed or
filtered.
Other observations/measurements impacted by this problem: I think that
some of the radiation codes that use the sonde
data as input don't handle the descending samples
well. I'm not sure which ones may be affected.
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.) Users should be notified and,
if (and only if) requested, the sounding could be reprocessed either using
the software developed at the EC or the digi-CORA.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/17/1995 | 1429 | 04/17/1995 | 1551 |
| Subject: | Bad surface values in sounding 4/17/95 14:29 |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: SGPSONDEC1
Subject: Bad surface values in sounding 4/17/95 14:29
Date Submitted: 4/19/95
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: All
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 4/17/95 Time 14:29 (GMT)
End Date 4/17/95 Time 15:51 (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The operator entered incorrect surface values for both RH and pressure.
Because of the way altitude is calculated, the incorrect pressure value
has the effect of making all subsequent altitude values incorrect. The
RH error only affects the first sample.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/17/1995 | 2330 | 07/17/1995 | 2330 |
| Subject: | Reprocess: Sounding done in research mode |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR No: Platform:
Subject: B1 Sounding 950717:2330 Done in Research Mode
Date Submitted: 7/22/95
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: SGPSONDEB1
What level data: (raw,a0,a1,b1,c1 etc): ALL
What location was the data collected at: SGP/B1 (Hillsboro)
Period of time in question
Begin Date 7/17/95 Time 23:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
_X_ others
Discussion of Problem: This sounding was done in RESEARCH mode for
both thermodynamic as well as wind data. The
normal mode is to for RESEARCH winds only. As
a result, both the ascending and descending
flights of the sonde are included in the data
file and none of the data are smoothed or
filtered.
Other observations/measurements impacted by this problem: I think that
some of the radiation codes that use the sonde
data as input don't handle the descending samples
well. I'm not sure which ones may be affected.
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.) Users should be notified and,
if (and only if) requested, the sounding could be reprocessed either using
the software developed at the EC or the digi-CORA.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/18/1995 | 0530 | 07/18/1995 | 0530 |
| Subject: | Reprocess: Sounding done in research mode |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR No: Platform:
Subject: B1 Sounding 950718:0530 Done in Research Mode
Date Submitted: 7/22/95
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: SGPSONDEB1
What level data: (raw,a0,a1,b1,c1 etc): ALL
What location was the data collected at: SGP/B1 (Hillsboro)
Period of time in question
Begin Date 7/18/95 Time 05:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
_X_ others
Discussion of Problem: This sounding was done in RESEARCH mode for
both thermodynamic as well as wind data. The
normal mode is to for RESEARCH winds only. As
a result, both the ascending and descending
flights of the sonde are included in the data
file and none of the data are smoothed or
filtered.
Other observations/measurements impacted by this problem: I think that
some of the radiation codes that use the sonde
data as input don't handle the descending samples
well. I'm not sure which ones may be affected.
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.) Users should be notified and,
if (and only if) requested, the sounding could be reprocessed either using
the software developed at the EC or the digi-CORA.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/18/1995 | 2330 | 07/18/1995 | 2330 |
| Subject: | Reprocess: Sounding done in research mode |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR No: Platform:
Subject: B1 Sounding 950718:2330 Done in Research Mode
Date Submitted: 7/23/95
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: SGPSONDEB1
What level data: (raw,a0,a1,b1,c1 etc): ALL
What location was the data collected at: SGP/B1 (Hillsboro)
Period of time in question
Begin Date 7/18/95 Time 23:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
_X_ others
Discussion of Problem: This sounding was done in RESEARCH mode for
both thermodynamic as well as wind data. The
normal mode is to for RESEARCH winds only. As
a result, both the ascending and descending
flights of the sonde are included in the data
file and none of the data are smoothed or
filtered.
Other observations/measurements impacted by this problem: I think that
some of the radiation codes that use the sonde
data as input don't handle the descending samples
well. I'm not sure which ones may be affected.
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.) Users should be notified and,
if (and only if) requested, the sounding could be reprocessed either using
the software developed at the EC or the digi-CORA.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/20/1994 | 2330 | 05/21/1994 | 2359 |
| Subject: | SGP/SONDE/B1 - Reprocess: sonde RESEARCH mode altitudes biased low |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR DESCRIPTION:
DQR No: Platform: BBSS
Subject: Sonde RESEARCH mode altitudes biased low
Date Submitted: 8/15/95
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement:
What level data: (raw,a0,a1,b1,c1 etc): All
What location was the data collected at: CF, all BFs
Period of time in question
Begin Date 4/ 7/94 Time : (GMT)
End Date / / Time : (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem: I have discovered a problem with the RESEARCH mode
(for PTU) Vaisala processing that results in a negative bias in the calculation
of sonde altitude. This bias results from neglecting the sensed relative
humidity when calculating air density when integrating the hydrostatic
equation. In essence, the Vaisala RESEARCH mode (PTU) processing assumes
a dry atmosphere when calculating sonde altitude. The magnitude of the bias
is cumulative with height and will depend on the vertical distribution of
moisture, but I have found that it can be as much as 20 meters at the
tropopause (the RESEARCH-mode sounding altitudes will be smaller than
altitudes calculated by using sensed RH). This problem applies to all
soundings done in "WXPR" mode, where X is either R or N. In particular,
all soundings done during the April 1994 (RCS) IOP (4/7/94 to 5/21/94)
are affected as well as those occasional inadvertent WXPR soundings.
Note that the only variable affected is "alt."
In response to my queries, Vaisala explained that the dry-air calculation was
selected to increase the processing speed in RESEARCH mode. They consider
the problem to be a minor one. Vaisala claims that altitudes in NORMAL
(or NOMINAL) processing are calculated by including the sensed RH. My
simulation experiments have not yet progressed to the point where I can
confirm this independently.
Other observations/measurements impacted by this problem: Unknown.
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Users of the data should be informed of the problem. I have developed software
that will reproduce the standard output stream with correct altitudes from
the raw binary data and can provide it to interested users. Boundary facility
soundings can also be reprocessed through the digi-CORA systems if need be.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/11/1995 | 1755 | 08/11/1995 | 1755 |
| Subject: | bad surface tdry value in sounding 17:55 |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: SGPSONDEC1
Subject: Bad surface tdry value in sounding 8/11/95 17:55
Date Submitted: 8/16/95
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: All
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 8/11/95 Time 17:55 (GMT)
End Date 8/11/95 Time 17:55 (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
An incorrect value was entered by the operator for surface temperature.
The value entered as 28.8 should be 31.8. This error was noted in the
site operations log by the operator shortly after it occurred.
The remaining values in the sounding should be fine.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/03/1995 | 0000 | 10/03/1995 | 0100 |
| Subject: | Apparent Interference Signal in Sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sondeC1
Subject: Apparent Interference Signal in Sounding CF:951002:2330
Date Submitted: October 6, 1995
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement:
What level data: (raw,a0,a1,b1,c1 etc): All
What location was the data collected at: CF
Period of time in question
Begin Date 10/03/95 Time XX:XX:XX (GMT)
End Date 10/03/95 Time 00:54:12 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem: It appears as if the ground station started to
receive data from a foreign sonde (i.e., not the sonde originally being
tracked) at an altitude of about 14.5 km. At this point the RH signal
drops out, and both the pressure and temperature signals are noisy and
look unnatural.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/03/1995 | 0000 | 10/03/1995 | 0940 |
| Subject: | Apparent Interference Signal in Sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sondeC1
Subject: Apparent Interference Signal in Sounding CF:951003:0830
Date Submitted: October 6, 1995
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement:
What level data: (raw,a0,a1,b1,c1 etc): All
What location was the data collected at: CF
Period of time in question
Begin Date 10/03/95 Time XX:XX:XX (GMT)
End Date 10/03/95 Time 09:40:20 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem: It appears as if the ground station started to
receive data from a foreign sonde (i.e., not the sonde originally being
tracked) at an altitude of about 14.0 km. At this point the RH signal
drops out, and both the pressure and temperature signals are noisy and
look unnatural.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/03/1995 | 0000 | 10/03/1995 | 1525 |
| Subject: | Apparent Interference Signal in Sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sondeC1
Subject: Apparent Interference Signal in Sounding CF:951003:1429
Date Submitted: October 6, 1995
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement:
What level data: (raw,a0,a1,b1,c1 etc): All
What location was the data collected at: CF
Period of time in question
Begin Date 10/03/95 Time XX:XX:XX (GMT)
End Date 10/03/95 Time 15:25:24 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem: It appears as if the ground station started to
receive data from a foreign sonde (i.e., not the sonde originally being
tracked) at an altitude of about 12.7 km. At this point the RH signal
drops out, and both the pressure and temperature signals are noisy and
look unnatural.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/04/1995 | 0000 | 10/04/1995 | 0707 |
| Subject: | Apparent Interference Signal in Sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sondeC1
Subject: Apparent Interference Signal in Sounding CF:951004:0530
Date Submitted: October 6, 1995
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement:
What level data: (raw,a0,a1,b1,c1 etc): All
What location was the data collected at: CF
Period of time in question
Begin Date 10/04/95 Time XX:XX:XX (GMT)
End Date 10/04/95 Time 07:07:50 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem: It appears as if the ground station started to
receive data from a foreign sonde (i.e., not the sonde originally being
tracked) at an altitude of about 12.0 km. At this point the RH signal
drops out, and both the pressure and temperature signals are noisy and
look unnatural.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/04/1995 | 0000 | 10/04/1995 | 0945 |
| Subject: | Apparent Interference Signal in Sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sondeC1
Subject: Apparent Interference Signal in Sounding CF:951004:0834
Date Submitted: October 6, 1995
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement:
What level data: (raw,a0,a1,b1,c1 etc): All
What location was the data collected at: CF
Period of time in question
Begin Date 10/04/95 Time XX:XX:XX (GMT)
End Date 10/04/95 Time 09:45:30 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem: It appears as if the ground station started to
receive data from a foreign sonde (i.e., not the sonde originally being
tracked) at an altitude of about 11.5 km. At this point the RH signal
and the pressure and temperature signals are noisy and look unnatural.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/04/1995 | 0000 | 10/04/1995 | 1312 |
| Subject: | Apparent Interference Signal in Sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sondeC1
Subject: Apparent Interference Signal in Sounding CF:951004:1130
Date Submitted: October 6, 1995
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement:
What level data: (raw,a0,a1,b1,c1 etc): All
What location was the data collected at: CF
Period of time in question
Begin Date 10/04/95 Time XX:XX:XX (GMT)
End Date 10/04/95 Time 13:12:02 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem: It appears as if the ground station started to
receive data from a foreign sonde (i.e., not the sonde originally being
tracked) at an altitude of about 17.0 km. At this point the RH signal
drops out and the pressure and temperature signals are noisy and look
unnatural.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/17/1996 | 2031 | 01/17/1996 | 2031 |
| Subject: | Jump in pressure value upon launch |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: SGPSONDEC1
Subject: Jump in pressure value upon launch 960117:2031
Date Submitted: 1/22/96
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondeWRPNC1/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 1/17/96 Time 20:31 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
It appears that the pressure sensor was jarred during launch and jumped
readings from 975.4 hPa at the surface to 950.2 hPa at the first sample
after launch. This results in erroneous altitude values throughout the
sounding and erroneous ascent rate values during the first 30 seconds.
The relative altitude calculations after the second sample should be
correct. Although the surface wind speed was recorded at 10.3 m/s,
the next wind value is reported as 18.2 m/s - quite strong. The bouncing
of the balloon during the launch might account for the abnormal jarring
of the sonde.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/18/1996 | 0533 | 01/18/1996 | 0533 |
| Subject: | Jump in pressure value upon launch |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: SGPSONDEC1
Subject: Jump in pressure value upon launch 960118:0533
Date Submitted: 1/22/96
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondeWRPNC1/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 1/18/96 Time 05:33 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
It appears that the pressure sensor was jarred during launch and jumped
readings from 973.1 hPa at the surface to 960.7 hPa at the first sample
after launch. This results in erroneous altitude values throughout the
sounding and erroneous ascent rate values during the first 30 seconds.
The relative altitude calculations after the second sample should be
correct. The surface winds were quite strong, 16.5 m/s. The bouncing
of the balloon during the launch might account for the abnormal jarring
of the sonde.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/13/1995 | 0531 | 12/13/1995 | 0531 |
| Subject: | Bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding 12/13/95:0531
Date Submitted: 1/29/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 12/13/95 Time 05:31 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 1010 hPa.
The first pressure value reported by the sonde is 971.8 hPa. Pressure at SMOS13
at 05:30 was 973.7 hPa. The reason for the discrepency between the apparent
surface pressure and that entered by the operator is unknown.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/01/1996 | 1129 | 02/01/1996 | 1129 |
| Subject: | bad pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad pressure sounding 02/01/96:1129
Date Submitted: 2/01/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 02/01/96 Time 11:29 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 962.6.
The first pressure value reported by the sonde is 962.4 hPa. The surface
pressure in the previous (0533) and subsequent (1429) soundings were 983.3
and 985.7 respectively. SMOS13 pressures were in the 983+ range during
this same period. It appears that the sonde pressure sensor was bad and
was used as the source of the surface pressure (this is CF standard procedure).
Both the pressure and altitude values for this sounding are likely incorrect.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/01/1996 | 1745 | 02/01/1996 | 1746 |
| Subject: | signal interruption |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR No: Platform: sgpsondeB1
Subject: Signal Interuption BF1 Sounding 02/01/96:1730
Date Submitted: 2/20/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnB1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: Morris - CF
Period of time in question
Begin Date 02/01/96 Time 17:45:50 (GMT)
End Date 02/01/96 Time 17:46:56 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The normal data in this sounding were interupted mid-flight, possibly as
a result of interference from another sonde. Because this interuption did
not cause 'missing' data but rather incorrect data to be inserted into the
output file, the normal qc flags WERE triggered and users who normally check
the flags should have no trouble. Other users should be alerted.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date
----- End Included Message ----- |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/21/1996 | 1131 | 02/21/1996 | 1131 |
| Subject: | Incorrect surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Incorrect surface pressure sounding 960221:1131
Date Submitted: 2/22/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 02/21/96 Time 11:31 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 995.6 hPa.
The first pressure value reported by the sonde is 972.3 hPa. It appears that
the operator entered sea-level pressure reported by the WeatherMeasureII instead
of sonde surface pressure. The altitude values for this sounding are likely
incorrect.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data and remind operators of current procedures. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/21/1996 | 1430 | 02/21/1996 | 1430 |
| Subject: | Incorrect surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Incorrect surface pressure sounding 960221:1430
Date Submitted: 2/22/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 02/21/96 Time 14:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 995.6 hPa.
The first pressure value reported by the sonde is 969.7 hPa. It appears that
the operator entered sea-level pressure reported by the WeatherMeasureII instead
of sonde surface pressure. The altitude values for this sounding are likely
incorrect.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data and remind operators of current procedures. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/14/1995 | 1730 | 12/14/1995 | 1730 |
| Subject: | SGP/SONDE/B5 - incorrect factory RH calib-radiosondes |
| DataStreams: | sgpsondewrpnB5.a0, sgpsondewrpnB5.a1 |
| Description: | Ongoing investigation of differences between preciptiable water vapor
measured by the microwave radiometer and precipitable water vapor estimated
by integrating the radiosonde-measured profile of water vapor density, along
with isolated periods of anomalous behavior in the AERI/LBLRTM QME results
led to the suggestion that the calibration of some radiosondes may be suspect.
One group of radiosondes, calibrated in November 1994, seemed particularly
irregular. I met with the manufacturer on February 7 to show them my
results and discuss this issue with them. The manufacturer agreed that
the data were suggestive of a calibration problem and offered to review
their calibration records for the period in question.
The initial results of the manufacture's investigation were sent to me
on February 27. The manufacturer found that radiosondes assembled
between 10/26/94 and 11/22/94 were incorrectly calibrated. The incorrect
calibration affected only the relative humidity measurement; the nature
of the calibration error is non-linear, with the radiosondes meeting
the specified +/- 2% RH accuracy at both 20%RH (+45 degC) and 0%RH (room
temperature). The error in calibration occurs at high RH and low temperature
(approximate saturation at -30 degC) and can be as large as 10%RH with
the radiosonde reading high. The direction of this error agrees with
the observation of negative integrated residuals in the AERI ch 1 region
made by Tony Clough and the tendency toward greater than 'normal' differences
in PWV when compared to the MWR when these sondes were used.
The cause of the calibration error was the addition of new, high RH,
quality control check (-30 degC) into the manufacturing stream that
required a change in the calibration software. The new software mistakenly
loaded an incorrect parameter file that caused the calibration to be
off at high RH - this was not noticed at the time because the radiosondes
passed the regular production QC checks and the failure to agree at the
new QC value was thought to result from a problem with the new reference
standard. Troubleshooting the entire calibration system in an effort
to incorporate the new QC check was conducted along with normal production,
and took about a month to complete. The troubleshooting including adjustment
of the calibration software, at which time the correct parameter file
happened to be reloaded, and after which the radiosondes met the desired
specification at the high RH value.
According to the manufacturer, approximately 1900 radiosondes were calibrated
during the period in question. Sondes from this period were used at all
CART facilities. At least 1178 soundings involving these sondes were
included in the QME results I looked at (some QME results were discarded
because of problems with either the MWR data or the sounding data). The
distribution of these 1178 by facility is:
Facility Number of Sondes First Used Last Used
(based on QME)
CF 316 1/20/95 (11:30) 9/22/95 (11:30)
B1 143 2/21/95 (17:30) 9/29/95 ( 8:30)
B4 313 4/ 6/95 (17:30) 11/ 7/95 (17:28)
B5 153 4/14/95 (17:30) 12/14/95 (17:30)
B6 253 3/22/95 (17:30) 10/19/95 (17:30)
The sondes can be recognized by decoding the serial_number metadata word
in the sounding netCDF file. The serial number of the sondes in question
is a number (8 or 9 digit) of the form DDMMYTTPP where DD is the day of
the month (leading zero missing in the netCDF data), MM is the month +80
(e.g. 91 for November), Y is the last digit of the year (4 for 1994),
TT is the calibration tray ID, and PP is the position of the sonde in
the calibration tray. The sondes in question will therefore have serial
numbers coded between 26904TTPP and 22914TTPP. |
| Measurements: | sgpsondewrpnB5.a1:
sgpsondewrpnB5.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/20/1995 | 1130 | 09/22/1995 | 1130 |
| Subject: | SGP/SONDE/C1 - incorrect factory RH calib-radiosondes |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | Ongoing investigation of differences between preciptiable water vapor
measured by the microwave radiometer and precipitable water vapor estimated
by integrating the radiosonde-measured profile of water vapor density, along
with isolated periods of anomalous behavior in the AERI/LBLRTM QME results
led to the suggestion that the calibration of some radiosondes may be suspect.
One group of radiosondes, calibrated in November 1994, seemed particularly
irregular. I met with the manufacturer on February 7 to show them my
results and discuss this issue with them. The manufacturer agreed that
the data were suggestive of a calibration problem and offered to review
their calibration records for the period in question.
The initial results of the manufacture's investigation were sent to me
on February 27. The manufacturer found that radiosondes assembled
between 10/26/94 and 11/22/94 were incorrectly calibrated. The incorrect
calibration affected only the relative humidity measurement; the nature
of the calibration error is non-linear, with the radiosondes meeting
the specified +/- 2% RH accuracy at both 20%RH (+45 degC) and 0%RH (room
temperature). The error in calibration occurs at high RH and low temperature
(approximate saturation at -30 degC) and can be as large as 10%RH with
the radiosonde reading high. The direction of this error agrees with
the observation of negative integrated residuals in the AERI ch 1 region
made by Tony Clough and the tendency toward greater than 'normal' differences
in PWV when compared to the MWR when these sondes were used.
The cause of the calibration error was the addition of new, high RH,
quality control check (-30 degC) into the manufacturing stream that
required a change in the calibration software. The new software mistakenly
loaded an incorrect parameter file that caused the calibration to be
off at high RH - this was not noticed at the time because the radiosondes
passed the regular production QC checks and the failure to agree at the
new QC value was thought to result from a problem with the new reference
standard. Troubleshooting the entire calibration system in an effort
to incorporate the new QC check was conducted along with normal production,
and took about a month to complete. The troubleshooting including adjustment
of the calibration software, at which time the correct parameter file
happened to be reloaded, and after which the radiosondes met the desired
specification at the high RH value.
According to the manufacturer, approximately 1900 radiosondes were calibrated
during the period in question. Sondes from this period were used at all
CART facilities. At least 1178 soundings involving these sondes were
included in the QME results I looked at (some QME results were discarded
because of problems with either the MWR data or the sounding data). The
distribution of these 1178 by facility is:
Facility Number of Sondes First Used Last Used
(based on QME)
CF 316 1/20/95 (11:30) 9/22/95 (11:30)
B1 143 2/21/95 (17:30) 9/29/95 ( 8:30)
B4 313 4/ 6/95 (17:30) 11/ 7/95 (17:28)
B5 153 4/14/95 (17:30) 12/14/95 (17:30)
B6 253 3/22/95 (17:30) 10/19/95 (17:30)
The sondes can be recognized by decoding the serial_number metadata word
in the sounding netCDF file. The serial number of the sondes in question
is a number (8 or 9 digit) of the form DDMMYTTPP where DD is the day of
the month (leading zero missing in the netCDF data), MM is the month +80
(e.g. 91 for November), Y is the last digit of the year (4 for 1994),
TT is the calibration tray ID, and PP is the position of the sonde in
the calibration tray. The sondes in question will therefore have serial
numbers coded between 26904TTPP and 22914TTPP. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/21/1995 | 1730 | 09/29/1995 | 0830 |
| Subject: | SGP/SONDE/B1 - incorrect factory RH calib-radiosondes |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | Ongoing investigation of differences between preciptiable water vapor
measured by the microwave radiometer and precipitable water vapor estimated
by integrating the radiosonde-measured profile of water vapor density, along
with isolated periods of anomalous behavior in the AERI/LBLRTM QME results
led to the suggestion that the calibration of some radiosondes may be suspect.
One group of radiosondes, calibrated in November 1994, seemed particularly
irregular. I met with the manufacturer on February 7 to show them my
results and discuss this issue with them. The manufacturer agreed that
the data were suggestive of a calibration problem and offered to review
their calibration records for the period in question.
The initial results of the manufacture's investigation were sent to me
on February 27. The manufacturer found that radiosondes assembled
between 10/26/94 and 11/22/94 were incorrectly calibrated. The incorrect
calibration affected only the relative humidity measurement; the nature
of the calibration error is non-linear, with the radiosondes meeting
the specified +/- 2% RH accuracy at both 20%RH (+45 degC) and 0%RH (room
temperature). The error in calibration occurs at high RH and low temperature
(approximate saturation at -30 degC) and can be as large as 10%RH with
the radiosonde reading high. The direction of this error agrees with
the observation of negative integrated residuals in the AERI ch 1 region
made by Tony Clough and the tendency toward greater than 'normal' differences
in PWV when compared to the MWR when these sondes were used.
The cause of the calibration error was the addition of new, high RH,
quality control check (-30 degC) into the manufacturing stream that
required a change in the calibration software. The new software mistakenly
loaded an incorrect parameter file that caused the calibration to be
off at high RH - this was not noticed at the time because the radiosondes
passed the regular production QC checks and the failure to agree at the
new QC value was thought to result from a problem with the new reference
standard. Troubleshooting the entire calibration system in an effort
to incorporate the new QC check was conducted along with normal production,
and took about a month to complete. The troubleshooting including adjustment
of the calibration software, at which time the correct parameter file
happened to be reloaded, and after which the radiosondes met the desired
specification at the high RH value.
According to the manufacturer, approximately 1900 radiosondes were calibrated
during the period in question. Sondes from this period were used at all
CART facilities. At least 1178 soundings involving these sondes were
included in the QME results I looked at (some QME results were discarded
because of problems with either the MWR data or the sounding data). The
distribution of these 1178 by facility is:
Facility Number of Sondes First Used Last Used
(based on QME)
CF 316 1/20/95 (11:30) 9/22/95 (11:30)
B1 143 2/21/95 (17:30) 9/29/95 ( 8:30)
B4 313 4/ 6/95 (17:30) 11/ 7/95 (17:28)
B5 153 4/14/95 (17:30) 12/14/95 (17:30)
B6 253 3/22/95 (17:30) 10/19/95 (17:30)
The sondes can be recognized by decoding the serial_number metadata word
in the sounding netCDF file. The serial number of the sondes in question
is a number (8 or 9 digit) of the form DDMMYTTPP where DD is the day of
the month (leading zero missing in the netCDF data), MM is the month +80
(e.g. 91 for November), Y is the last digit of the year (4 for 1994),
TT is the calibration tray ID, and PP is the position of the sonde in
the calibration tray. The sondes in question will therefore have serial
numbers coded between 26904TTPP and 22914TTPP. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/01/1996 | 1430 | 04/01/1996 | 1430 |
| Subject: | Bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding 04/01/96 14:30
Date Submitted: 4/2/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 4/01/96 Time 14:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 1016.1
hPa. The first pressure value reported by the sonde is 988.3 hPa. The surface
pressure at 11:29 was 987.6 and at 17:32 was 988.3. It appears that the
operator entered the sea-level pressure rather than the station pressure.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/12/1996 | 0531 | 04/12/1996 | 0531 |
| Subject: | Bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding 04/12/96 05:31
Date Submitted: 4/15/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 4/12/96 Time 05:31 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 996.1
hPa. The first pressure value reported by the sonde is 964.2 hPa. The surface
pressure at 11:30 was 972.0 and at 14:30 was 973.5. It appears that the
operator entered the sea-level pressure rather than the station pressure.
The SMOS pressure during the period is in the 960-970 range.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/06/1996 | 0529 | 05/06/1996 | 0529 |
| Subject: | Bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding 05/04/96 05:29
Date Submitted: 5/06/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 5/06/96 Time 05:29 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 993.3
hPa. The first pressure value reported by the sonde is 964.0 hPa. The surface
pressure at 08:30 was 964.7 and at 11:31 was 954.3. It appears that the
operator entered the sea-level pressure rather than the station pressure.
The SMOS pressure during the period is in the 960-950 range.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/29/1996 | 2031 | 05/29/1996 | 2031 |
| Subject: | bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding 05/29/96 20:31
Date Submitted: 6/2/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 05/29/96 Time 20:31 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 999.2
hPa. The first pressure value reported by the sonde is 978.2 hPa. The surface
pressure at 17:25 was 980.1 and at 05:30 (5/30) was 981.8. It appears that the
operator entered the sea-level pressure rather than the station pressure.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/10/1996 | 1730 | 06/10/1996 | 1730 |
| Subject: | bad surface values sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface values sounding 06/10/96 17:30
Date Submitted: 6/11/96
Submitted By: Barry Lesht _X_ Instrument Mentor
David Glahn ___ EST Member
___ Science Team Member
_X_ Other _Site Ops__________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 06/10/96 Time 17:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The site operator inadvertently entered incorrect surface met values for
the subject sounding. Although he caught the error soon after launch
and reported it immediately, it was too late to correct. The following
table shows the incorrect (present in the file) and correct values.
Incorrect Correct
Pressure 1000.0 973.9
Temperature 35.0 30.5
Relative Humidity 27 30
The incorrect values of surface temperature and relative humidity will not
affect the other values in the sounding. The incorrect surface pressure
will, however, affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/01/1996 | 1130 | 07/01/1996 | 1130 |
| Subject: | Bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding 06/21/96 11:30
Date Submitted: 7/1/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 07/01/96 Time 11:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 996.4
hPa. The first pressure value reported by the sonde is 972.3 hPa. The surface
pressure at 05:30 was 972.3 and at 14:46 was 976.1. It appears that the
operator entered the sea-level pressure rather than the station pressure.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/04/1996 | 1728 | 07/04/1996 | 1728 |
| Subject: | Bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding 07/04/96 17:28
Date Submitted: 7/6/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 07/04/96 Time 17:28 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 995.4
hPa. The first pressure value reported by the sonde is 970.1 hPa. The surface
pressure at 14:30 was 972.3 and at 20:27 was 971.1. It appears that the
operator entered the sea-level pressure rather than the station pressure.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/02/1996 | 2330 | 08/02/1996 | 2330 |
| Subject: | Bad surface pressure sounding |
| DataStreams: | sgpsondewrpnB5.a0, sgpsondewrpnB5.a1 |
| Description: | DQR No: Platform: sgpsondeB5
Subject: Bad surface pressure sounding BF5 08/02/96:2330
Date Submitted: 8/5/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnB5/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: BF5 Morris
Period of time in question
Begin Date 08/02/96 Time 23:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 997.5
hPa. The first pressure value reported by the sonde is 986.9 hPa. The surface
pressure at 20:30 was 988.3 and at 02:30 was 986.4. It appears that the
operator mistakenly entered the 997.5 rather than 987.5.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date
----- End Included Message ----- |
| Measurements: | sgpsondewrpnB5.a1:
sgpsondewrpnB5.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/05/1996 | 0530 | 08/05/1996 | 0530 |
| Subject: | Questionable surface pressure sounding |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | Subject: DQR B1 sounding 960805:0530
Content-Length: 1852
DQR No: Platform: sgpsondeB1
Subject: Questionable surface pressure sounding BF1 08/05/96:0530
Date Submitted: 8/5/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnB1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: BF1 Hillsboro
Period of time in question
Begin Date 08/05/96 Time 05:30 (GMT)
End Date Time (GMT)
Data should be labeled:
_X_ questionable ___ All data fields affected
___ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 967.1
hPa. The first pressure value reported by the sonde is 954.4 hPa. The surface
pressure at 02:30 was 950.3 but at 23:30 (8/4) it was 962.5 (sonde 960.7).
It appears that the either the operator mistakenly entered the 967.1 rather
than 957.1 and/or that the pressure sensor may have jumped after launch.
In any event, the difference between the surface sample and the first sonde
sample exceeds our criterion for flagging.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date
----- End Included Message ----- |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/06/1996 | 1730 | 08/06/1996 | 1730 |
| Subject: | Questionable surface pressure sounding |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR No: Platform: sgpsondeB1
Subject: Questionable surface pressure sounding BF1 08/06/96:17:30
Date Submitted: 8/9/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnB1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: BF1 Hillsboro
Period of time in question
Begin Date 08/06/96 Time 17:30 (GMT)
End Date Time (GMT)
Data should be labeled:
_X_ questionable ___ All data fields affected
___ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 967.8
hPa. The first pressure value reported by the sonde is 956.5 hPa. I cannot
tell if the operator entered the surface pressure incorrectly or if the
sonde pressure sensor jumped after launch. In any event, the difference
between the surface sample and the first sonde sample exceeds our
criterion for flagging.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/09/1996 | 1429 | 09/09/1996 | 1429 |
| Subject: | bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding C1 09/09/96:14:29
Date Submitted: 9/9/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 09/09/96 Time 14:29 (GMT)
End Date Time (GMT)
Data should be labeled:
____ questionable ___ All data fields affected
_X__ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 1001.4
hPa. The first pressure value reported by the sonde is 979.7 hPa. It appears
that the operator incorrectly entered sea-level pressure obtained from the
WeatherMeasure set rather than surface pressure obtained from the radiosonde.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/09/1996 | 1731 | 09/09/1996 | 1731 |
| Subject: | bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding C1 09/09/96:17:31
Date Submitted: 9/9/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 09/09/96 Time 17:31 (GMT)
End Date Time (GMT)
Data should be labeled:
____ questionable ___ All data fields affected
_X__ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 1001.5
hPa. The first pressure value reported by the sonde is 978.9 hPa. It appears
that the operator incorrectly entered sea-level pressure obtained from the
WeatherMeasure set rather than surface pressure obtained from the radiosonde.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date
----- End Included Message ----- |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/09/1996 | 2029 | 09/09/1996 | 2029 |
| Subject: | bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding C1 09/09/96:20:29
Date Submitted: 9/9/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 09/09/96 Time 20:29 (GMT)
End Date Time (GMT)
Data should be labeled:
____ questionable ___ All data fields affected
_X__ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 999.4
hPa. The first pressure value reported by the sonde is 975.4 hPa. It appears
that the operator incorrectly entered sea-level pressure obtained from the
WeatherMeasure set rather than surface pressure obtained from the radiosonde.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/12/1996 | 0830 | 09/12/1996 | 0830 |
| Subject: | bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding C1 09/12/96:0830
Date Submitted: 9/13/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 012/96 Time 08:30 (GMT)
End Date Time (GMT)
Data should be labeled:
____ questionable ___ All data fields affected
_X__ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 987.7
hPa. The first pressure value reported by the sonde is 976.1 hPa. The
operator transposed the correct surface pressure 978.7 when entering the
data.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/27/1996 | 0828 | 09/27/1996 | 0828 |
| Subject: | Bad surface pressure sounding |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Bad surface pressure sounding C1 09/26/96:0828
Date Submitted: 9/27/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 09/27/96 Time 08:28 (GMT)
End Date Time (GMT)
Data should be labeled:
____ questionable ___ All data fields affected
_X__ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 976.1
hPa. Analysis of the raw data file suggests that the actual surface pressure
at time of launch was 967.1 hPa. It appears that the operator transposed
the correct surface pressure from 967.1 to 976.1 when entering the data.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/10/1997 | 1730 | 01/10/1997 | 1730 |
| Subject: | Incorrect surface temperature |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Incorrect surface temperature: sounding C1 01/10/97:1730
Date Submitted: 1/11/97
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
_X_ Other - Site Ops
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 01/10/97 Time 17:30 (GMT)
End Date Time (GMT)
Data should be labeled:
____ questionable ___ All data fields affected
_X__ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The site operator noted that the surface temperature for the subject sounding
was entered incorrectly. The value entered was -3.3 degC; the correct value
should be -6.3 degC. This is a fairly benign error, only the surface values
will be affected.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/17/1997 | 1730 | 03/17/1997 | 1730 |
| Subject: | Incorrect surface pressure |
| DataStreams: | sgpsondewrpnB5.a1 |
| Description: | DQR No: Platform: sgpsondeB5
Subject: Incorrect surface pressure: sounding B5 03/17/97:1730
Date Submitted: 3/18/97
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other - Site Ops
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnB5.A1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: B5
Period of time in question
Begin Date 03/17/97 Time 17:30 (GMT)
End Date Time (GMT)
Data should be labeled:
____ questionable ___ All data fields affected
_X__ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
It appears that the site operator made a keyboard mistake when entering the
surface pressure for the subject sounding. The pressure was entered as 999.6
and the first pressure value reported by the radiosonde was 989.3 hPa. The
operators meteorological observaation log shows a sea-level pressure of 992.3
hPa at 1700.
The incorrect pressure value will affect the altitude values reported during
the sounding and the ascent rate values during the first 30 seconds of the
sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnB5.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/07/1997 | 1427 | 03/07/1997 | 1427 |
| Subject: | Questionable RH |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Questionable RH: sounding C1 03/07/97:1427
Date Submitted: 3/18/97
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other - Site Ops
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnC1.A1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: CF
Period of time in question
Begin Date 03/07/97 Time 14:27 (GMT)
End Date Time (GMT)
Data should be labeled:
_X__ questionable _?_ All data fields affected
_X__ incorrect _X_ Only some data fields affected
_?_ wrong calibration
___ others
Discussion of Problem:
David Cook pointed out that the RH values for the subject sounding disagree
substantially with values reported at the 60m tower. Review of the sounding
data shows saturation (100%) values reported at the surface and during
most of the sounding. The site ops log shows RH values of between 68% (1400)
and 52% (1500) at the surface. Surface temperature (8.4) and pressure (983.0)
obtained from the sonde are not substantially different from the surface
observations (7.8/10.8) and (982.7/982.4) at 1400 and 1500 respectively, so
it is unlikely that an incorrect calibration tape was used for the sonde.
I think the conclusion must be that the RH sensor on this sonde was bad.
As an operational issue, this sonde should have been rejected by site ops
because the surface RH value of 100% is more than 7% different than the surface
value obtained from an independent reference instrument. I will check the
procedures that I have provided to site ops to be sure that I included this
criterion.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/05/1997 | 2030 | 04/05/1997 | 2030 |
| Subject: | Reprocess: Jump in pressure value |
| DataStreams: | sgpsondewrpnB5.a1 |
| Description: | DQR No: Platform: sgpsondeB5
Subject: Jump in pressure value B5 sounding 970405.2030
Date Submitted: 4/10/97
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnb5/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/BF5
Period of time in question
Begin Date 4/5/97 Time 20:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The first pressure value reported by the radiosonde (t = 2 sec) is
967.3. The surface pressure value was 973.5 hPa. This difference
is slightly greater than the expected (normal) change and may mean that
either the pressure sensor was jarred during launch or the system
mis-identified the actual launch start time. Further clarification requires
analysis of the raw data which will take some time. The altitude values
for this sounding will be incorrect. The ascent rate values during the
first 30 seconds also will be wrong. Because the system will reject
samples with out of bound ascent rates (i.e., during the first 30 seconds),
the temperature and rh values also will be incorrect (result of
interpolation). Relative height values after 30 seconds should be okay.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnB5.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/05/1997 | 1732 | 05/05/1997 | 1732 |
| Subject: | Jump in pressure value |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Jump in pressure value C1 sounding 970505.1732
Date Submitted: 5/06/97
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnc1/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 5/05/97 Time 17:32 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The first pressure value reported by the radiosonde (t = 2 sec) is
974.9. The surface pressure value was 980.9 hPa. This difference
is somewhat greater than the expected (normal) change and may mean that
either the pressure sensor was jarred during launch or the system
mis-identified the actual launch start time. Further clarification requires
analysis of the raw data which will take some time. The altitude values
for this sounding will be incorrect. The ascent rate values during the
first 30 seconds also will be wrong. Because the system will reject
samples with out of bound ascent rates (i.e., during the first 30 seconds),
the temperature and rh values also will be incorrect (result of
interpolation). Relative height values after 30 seconds should be okay.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/06/1997 | 1814 | 05/06/1997 | 1815 |
| Subject: | Corrupted and missing data |
| DataStreams: | sgpsondewrpnB5.a1 |
| Description: | DQR No: Platform: sgpsondeB5
Subject: Corrupted and missing data B5 sounding 970506.1731
Date Submitted: 5/07/97
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnb5/ (all)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/BF5
Period of time in question
Begin Date 5/06/97 Time 18:14:30 (GMT)
End Date 5/06/97 Time 18:15:12 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
An apparent communication problem between the digi-CORA and the SDS led
to inclusion of one corrupt data scan (at 43 minutes, 30 seconds into
the sounding) and no data between valid scans at 43 min, 28 sec and
44 min, 16 sec. The corrupt data was interpreted by the ingest as
valid data and it is included in the netCDF file. Note, however, that
the QC flags for this scan are set correctly, indicating that the data
in the netCDF file violated the mentor QC criteria.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Reprocess sounding at BF5 pending decision of PRB. |
| Measurements: | sgpsondewrpnB5.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/21/1997 | 2027 | 06/21/1997 | 2027 |
| Subject: | Incorrect surface values |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | DQR No: Platform: sgpsondeC1
Subject: Incorrect surface values sounding 970621:2027
Date Submitted: 6/23/97
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnc1
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/CF
Period of time in question
Begin Date 6/21/97 Time 20:27 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
Site operations reports that incorrect surface values were entered into
the subject sounding. Instead of 972.3, 33.7, and 46 the surface pressure,
temperature, and humidity values should have been 971.8, 33.3, and 47.
The incorrect surface pressure will result in incorrect altitudes throughout
the profile and incorrect ascent rate values during the first 30 seconds.
The effects of the incorrect temperature and relative humidty values should
be negligable.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/22/1997 | 0228 | 06/22/1997 | 0236 |
| Subject: | Bad sounding file CF 970622:0228 |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | It appears that there was a problem with the radiosonde that generated this short file. The pressure values are unreasonably high and the file terminated after only 484 seconds of flight. I note that the operators started a new sounding at 0252. This entire file should be disregarded or deleted. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/04/1997 | 0525 | 07/04/1997 | 0630 |
| Subject: | Bad pressure values CF sounding 970704:0525 |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | The pressure values and hence altitude values are most likely incorrect in this sounding. It also appears that an incorrect surface pressure value was entered by the operator. The surface pressure value in the data (986.8) is somewhat higher than the surface pressures for the neighboring soundings and higher than recorded in the raw data collected before launch (~978 hPa). The first pressure value recorded by the sonde after launch is 884.8 hPa. Analysis of the absolutely raw data reveals that the sonde was reading about 978 hPa well before launch, then suddenly dropped to 886.8 at which it remained stable for several minutes, then began slowly decreasing as would be expected after launch. My best guess is that the sonde was somehow damaged during handling before launch resulting in erroneous pressure values. Relative pressure changes from an 'apparent' surface value of 886.8 hPa may be correct, but the absolute pressure values are not. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/29/1996 | 0527 | 04/29/1996 | 0527 |
| Subject: | Questionable pressure/altitude data |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | Ric Cederwall noticed that the lowest 85 samples of this sounding have nearly constant values of temperature and relative humidity. It appears that the system may have mis-identified the launch start time in a way that resulted in the system using interpolated values of pressure even though the sonde was still on the ground. This may have been caused by a damaged pressure sensor. I will examine the absolutely raw data to try and understand this further, but I think it is reasonable to assume that the first 85 samples or so are incorrect and representative of condidtions at the surface and that the pressure sensor was damaged during this sounding. I will request the raw data from the archive today. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/15/1997 | 1836 | 07/15/1997 | 1851 |
| Subject: | possible telemetry interference/interpolated data |
| DataStreams: | sgpsondewrpnB5.a1 |
| Description: | It appears that this sonde lost signal briefly a little after an hour into the flight at 18:36:42 (altitude approx 17 km. Signal was recovered, but it is possible that the signal was from a different sonde - temp and RH data appear to be interpolated in the interval from 17 to 20 km. I would treat all data above 17 km (after 18:36:42) as questionable. |
| Measurements: | sgpsondewrpnB5.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/15/1997 | 2030 | 07/15/1997 | 2030 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB5.a1 |
| Description: | The first pressure value returned by the radiosonde after launch (985.2) is somewhat lower than would be expected based on the entered surface pressure (990.0). It is likely that either the pressure sensor was jarred at launch or that the system mis-identified the launch time. Altitude and absolute pressure values will be affected and ascent rate values during the first 30 sec of flight will be incorrect. |
| Measurements: | sgpsondewrpnB5.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/21/1997 | 1430 | 09/21/1997 | 1430 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB5.a1 |
| Description: | The difference between the first pressure value reported by the sonde after launch (992.7) and the surface value entered by the operator (997.5) is somewhat greater than would normally be expected. This may indicate jarring of the pressure sensor at launch or misidentification of the start time by the system. The altitude values in the file will be incorrect as well be the ascent rate values during the first 30 seconds of the sounding. |
| Measurements: | sgpsondewrpnB5.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/21/1997 | 0530 | 09/21/1997 | 0530 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | The difference between the first pressure value recorded by the radiosonde after launch (984.5) that the surface value entered by the operator (989.3) is somewhat larger than would normally be expected. This will result in incorrect altitude values throughout the sounding. The ascent rates during the first 30 seconds also will be incorrect. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/27/1997 | 0530 | 09/27/1997 | 0530 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB1.a1 |
| Description: | The difference between first pressure value reported by the radiosonde after launch (954.4) and the surface value entered by the operator (961.7) is greater than expected , indicating that either ths sonde was jarred on launch or that the system mis-identified start time. |
| Measurements: | sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/03/1997 | 2030 | 10/03/1997 | 2030 |
| Subject: | Bad pressure absolute pressure values |
| DataStreams: | sgpsondewrpnB5.a1 |
| Description: | The BF operator noted that the sonde pressure was reading about 20 hPa low relative to ambient. Based on interpolation from the previous and subsequent soundings, the surface pressure was probably something like 978 hPa. The sonde pressure sensor was reading 955.8. It is possible that the operator used the wrong calibration tape, but it is more likely that their was a problem with the pressure sensor (based on the reasonable values of surface temperature and rh). |
| Measurements: | sgpsondewrpnB5.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/01/1998 | 0000 | 12/31/1999 | 2359 |
| Subject: | Incorrect radiosonde serial numbers |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | Radiosondes manufactured at Vaisala's Woburn, MA factory during the first of January 1998 have incorrect serial numbers. Instead of being numbered 8012XXXXX these sondes are numbered 7012XXXXX. Vaisala has been informed of this, has confirmed the problem, and has corrected their numbering for all subsequent sondes. 163 incorrectly numbered sondes were shipped to ARM on 1/9/98. Some have been used at the CF since 1/19/98:1430. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnB5.a1:
sgpsondewrpnB4.a0:
sgpsondewrpnB1.a0:
sgpsondewrpnB6.a0:
sgpsondewrpnB5.a0:
sgpsondewrpnB4.a1:
sgpsondewrpnB6.a1:
sgpsondewrpnC1.a1:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/23/1998 | 0830 | 01/23/1998 | 0830 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered inside temperature (24.1 degC) and RH (15) instead of outside (approx -5.6 degC, 89RH). This will affect the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/23/1998 | 1130 | 01/23/1998 | 1130 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered inside temperature (24.4 degC) and relative humidity (15) instead of outside (approx -4.0 degC, 82). This will affect the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/20/1998 | 1808 | 01/20/1998 | 1814 |
| Subject: | Telemetry interference |
| DataStreams: | sgpsondewrpnB5.a0, sgpsondewrpnB5.a1 |
| Description: | The ground station began tracking a different radiosonde at 18:08:26. Pressure and temperature data were recorded from this point to the end of the sounding at 18:12:52 but are incorrect. No wind or RH data were recorded after 18:08:26. The sounding up to this point is okay. |
| Measurements: | sgpsondewrpnB5.a1:
sgpsondewrpnB5.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/19/1998 | 1130 | 01/19/1998 | 1130 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | Incorrect values of surface temperature and relative humidity were entered by the operator. The surface temperature was entered as 17.5 degC; the first value reported by the sonde was -3.6 degC. The surface humidity was entered as 26; the first value reported by the sonde was 81%. It appears that the operator used the inside temperature/humidity rather than the sonde-reported outside temperature/humidity. Only the first few samples of the sounding will be affected. Note that the delta-check QC flag is set by this error. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/20/1998 | 0229 | 01/20/1998 | 0229 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | Incorrect values of surface temperature and relative humidity were entered by the operator. These were entered as 25.3 degC and 20% and should probably have been closer to -0.5 degC and 73%. It appears that the operator used the inside readings rather than the outside readings. This seems to be a recurring problem (similar DQRs follow) and site ops has been informed so procedures can be reviewed. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/20/1998 | 0530 | 01/20/1998 | 0530 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | Incorrect values of surface temperature and relative humidity were entered by the operator. These were entered as 22.1 degC and 20, but should probably be closer to -1.1 degC and 79%. It appears that the operator used the inside rather than the outside temperature. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/20/1998 | 2330 | 01/20/1998 | 2330 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered incorrect values of surface temperature and relative humidity. The values entered are 18.8 degC and 30rather should be closer to 10.0 degC and 55It appears that the operator entered the inside rather than the outside values. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/21/1998 | 0230 | 01/21/1998 | 0230 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered values of temperature and relative humidity obtained inside (21.3 degC, 23) rather than outside (closer to -0.4 degC, 79). These incorrect values will affect only the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/21/1998 | 0530 | 01/21/1998 | 0530 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered temperature and relative humidity values obtained from inside (21.8 degC, 20) rather than outside (closer to -1.8 degC, 78). The incorrect values will only affect the first few points in the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/22/1998 | 0830 | 01/22/1998 | 0830 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator apparently entered inside temperature and relative humidity (24.4, 21) rather than outside values (closer to -6.0, 81). The incorrect values will affect only the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/22/1998 | 1130 | 01/22/1998 | 1130 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered surface temperature and relative humidity (21.0, 18) obtained from inside rather than from outside (closer to -6.5, 75). This will affect the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/25/1998 | 1430 | 01/25/1998 | 1430 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | It appears that the operator incorrectly entered inside temperature (21.1 degC) and RH (23) instead of outside values obtained from the radiosonde (closer to 0.8 degC and 78) as surface values for this sounding. The first few levels of data will be affected. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/26/1998 | 1430 | 01/26/1998 | 1430 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | It appears that the operators entered the inside temperature (18.6 degC) and RH (29) rather than the outside values (approx 0.9 degC, 73) when prompted for the surface met data. These incorrect values will affect the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/29/1998 | 1431 | 04/29/1998 | 1431 |
| Subject: | Incorrect surface values |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | The surface pressure, temperature, and relative humidity are incorrect for this soundings. The values in the sounding netCDF file (975.6, 3.2, 86) are different from the surface observations in the site ops log (978.9, 9.1, and 83) and from the values in the raw radiosonde data file at the moment just before ascent (978.7, 9.5, 83). The reason for the differences are unknown, but insofar as the surface values are manually entered by the operator into both the log (where they are correct) and into the sounding file (where they are incorrect) an operator miscue is a possibility. The major effect of this problem will be incorrect absolute altitude. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/06/1998 | 0832 | 05/06/1998 | 0832 |
| Subject: | Incorrect surface pressure |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | The operator transposed the digits of the surface pressure entering 976.3 instead of 967.3. The ops log shows 967.3 for the sonde and 968.3 for the THWAPS. Analysis of the absolutely raw sonde data shows 968.0 at the system-identified launch time. Note that because the output pressure data are smoothed, under the assumption that the surface data value is true, the first value reported by the sonde after launch 970.4 also is incorrect. The raw value corresponding to the sample after launch is 966.6. The absolute pressure values will be incorrect for the first few samples of the sounding, as will be the ascent rates for the first 30 seconds. The absolute altitude values also will be in error. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/09/1998 | 1431 | 05/09/1998 | 1431 |
| Subject: | Incorrect surface pressure |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | The operator entered 960.2 for the surface pressure in both the log and the system. The first reading from the sonde is 950.9. Examination of the absolutely raw data shows that the sonde pressure before launch was 952.3. The THWAPS reading was 964.2. From the raw data it appears that either the system was not reset before this sounding or that a second sonde was started without resetting the system. The sonde pressure may be low in absolute terms or the operator may have mis-entered the actual sonde reading. In either case the absolute altitude will be wrong in this sounding and the ascent rates will be incorrect for the first 30 seconds. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/13/1998 | 2330 | 05/13/1998 | 2330 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB1.a1 |
| Description: | The difference between the first pressure reported by the sonde after launch (945.1) is substantially lower than that reported at the surface (955.7). This difference is greater than expected and suggests that either the sonde was jarred at launch or the system misidentified the actual start time. The effect is that the absolute altitudes will be incorrect for this sounding as will be the ascent rates during the first 30 seconds. |
| Measurements: | sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/14/1998 | 2346 | 07/14/1998 | 2346 |
| Subject: | Bad sounding |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | Data from this sounding look very fragmented as if only a few actual points were collected and intermediate points were intepolated. In a general sense this sounding looks 'weird' and should not be trusted. I do not yet have access to r1 so I can't look at the raw data, but I doubt that it will shed much light on the situation. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/09/1998 | 2029 | 05/09/1998 | 2029 |
| Subject: | Incorrect surface readings |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | It appears that the operator entered an incorrect set of surface data for the subject sounding. The sounding has surface PTU as 975.6 hPa, 20.0 degC, and 93% RH - the corresponding THWAPS readings are 969.7 hPa, 19.9 degC, and 72.1 %RH. The OMIS log for the subject souding shows sonde surface values of 969.2 hPa, 17.6 degC, and 70% RH. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/07/1998 | 2329 | 05/07/1998 | 2329 |
| Subject: | Incorrect surface RH |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | Because of what appears to be a typographical error, the operator entered 5% RH when the surface RH was 54% RH. The corresponding THWAPS reading is 50.1% RH and the OMIS log shows 54%RH. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/27/1992 | 0000 | 05/31/2002 | 2359 |
| Subject: | SGP/SONDE - Dry bias in sonde RH |
| DataStreams: | DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, sgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0, sgpsondeB4.a1, sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00, sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondeptuC1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0, sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1, sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00, sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0, sgpsondewrprB4.a1, sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00, sgpsondewrprC1.a0, sgpsondewrprC1.a1 |
| Description: | Vaisala has confirmed ARM findings of an apparent dry bias in the relative humidity measured by RS-80H radiosondes. The cause of the dry bias is thought to be contamination of the humidity sensor by volatile organic substances originating from some plastic parts of the radiosonde. The amount of contamination is a function of the time between the date of sonde manufacture and its use. All RS-80H sondes manufactured before week 34 of 1998 will show this bias. After week 34 of 1998 Vaisala changed its packaging to reduce, but not eliminate the contamination problem. Starting with RS-80 radiosonde manufactured in late June 2000 Vaisala enclosed the sensor boom in an inert plastic shield, thereby eliminating the contamination that caused the dry bias. Starting in May 2001 at the SGP, May 2002 at the TWP, and later 2002 at the NSA, ARM has moved to using RS-90 radiosondes. These sondes are not subject to the contaminatino that caused the dry bias. Vaisala is in the process of developing an algorithm that can be used to estimate the correct RH from knowledge of the sonde age. All of the ARM sounding data have sufficient metadata available to apply the correction. Additionally, ARM has funded a Science Team effort (Milosevich) to develop a 'best' correction algorithm for the RS-80 radiosonde humidity data. When completed this algorithm will allow us to reprocess the accumulated RS-80 data and produce a new data platform with what we hope will be more accurate data. |
| Measurements: | sgpsondeB4.00:
DsgpsondeB5.00:
sgpsondewrpnC1.00:
sgpsondewnpnC1.a1:
DsgpsondeptuB6.00:
DsgpsondenogcptucalcB1.c1:
sgpsondewrpnB6.a0:
DsgpsondeptuC1.00:
sgpsondewnprC1.a0:
DsgpsondenogcptucalcB5.c1:
DsgpsondeptucalcC1.c1:
sgpsondewnpnB4.a1:
sgpsondeB6.00:
sgpsondewrprB4.00:
DsgpsondeptuB1.00:
DsgpsondenogcptucalcC1.c1:
sgpsondewrpnC1.a1:
sgpsondewrpnB1.a1:
sgpsondewrprC1.00:
sgpsondewrpnB1.a0:
sgpsondewrprB5.a1:
sgpsondeB5.a1:
sgpsondewrprB5.00:
DsgpsondeC1.00:
sgpsondewrprB1.a1:
sgpsondeB1.00:
sgpsondeptuC1.00:
DsgpsondenogcptucalcB4.c1:
DsgpsondeB1.a0:
DsgpsondeC1.a1:
DsgpsondeptucalcB5.c1:
sgpsondewrprB1.00:
sgpsondewrpnC1.a0:
sgpsondewrpnB1.00:
sgpsondeB1.a0:
DsgpsondeC1.a0:
DsgpsondeB4.a1:
DsgpsondeptuB4.00:
sgpsondeB1.a1:
sgpsondewrprB5.a0:
sgpsondeC1.00:
sgpsondewnpnB1.a1:
sgpsondewrpnB6.a1:
sgpsondewrprC1.a0:
sgpsondeC1.a0:
sgpsondewrprC1.a1:
DsgpsondeptuB5.00:
sgpsondewrpnB5.a0:
sgpsondewrprB4.a1:
DsgpsondeB1.a1:
sgpsondeB5.a0:
sgpsondewnpnB6.a0:
DsgpsondeB5.a1:
DsgpsondenogcwrpnB1.c1:
sgpsondewrprB1.a0:
sgpsondewrpnB5.00:
DsgpsondeB4.a0:
DsgpsondenogcwrpnB4.c1:
DsgpsondeB5.a0:
sgpsondewnpnB4.a0:
sgpsondewnprC1.a1:
sgpsondewrpnB5.a1:
sgpsondewnpnB5.a0:
DsgpsondeB4.00:
sgpsondewrpnB6.00:
sgpsondewrprB4.a0:
sgpsondewnpnB1.a0:
sgpsondeB4.a1:
sgpsondeC1.a1:
sgpsondewrpnB4.00:
DsgpsondenogcwrpnB5.c1:
sgpsondewnpnC1.a0:
sgpsondewrpnB4.a0:
DsgpsondeB1.00:
sgpsondeB4.a0:
sgpsondewnpnB6.a1:
sgpsondewrpnB4.a1:
sgpsondewnpnB5.a1:
DsgpsondeptucalcB4.c1:
DsgpsondenogcwrpnC1.c1:
sgpsondeB5.00:
DsgpsondeptucalcB1.c1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/31/1999 | 0829 | 01/31/1999 | 0829 |
| Subject: | SGP/SONDE - Incorrect surface pressure |
| DataStreams: | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered the THWAPS surface pressure (965.6) rather than the sonde surface pressure (963.8) into the sounding file. This will result in inaccurate ascent rates during the first 30 seconds of the sounding and inaccurate absolute altitudes throughout. |
| Measurements: | sgpsondewrpnB1.00:
sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/09/1999 | 0834 | 02/09/1999 | 1016 |
| Subject: | SGP/SONDE - Wrong cal tape |
| DataStreams: | sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | There is something wrong with this sounding, its not clear exactly what happened, however. The first values reported by the radiosonde are much different from those entered by the operator. My impression is that this is a calibration tape mixup. The raw data file shows that the sounding software was initialized twice for this sounding, the first time showing sonde 823360910, the second time showing sonde 819351814. There is no enties in the operations log that describe a problem with a sonde before launch. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewndcalcC1.c1:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/02/1999 | 0828 | 03/02/1999 | 0828 |
| Subject: | SGP/SONDE - Pressure jump at launch |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | The difference between the sonde-reported pressure at the surface (969.1 hPa) and the first pressure value reported after launch (963.5) is larger than expected. This may indicate that either the pressure sensor was jarred at launch, that the system failed to correctly identify the launch start time, or some other problem. The ascent rates during the first 30 seconds of the sounding will be incorrect as will the absolute altitudes during the sounding. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/03/1999 | 0842 | 03/03/1999 | 0842 |
| Subject: | SGP/SONDE - Pressure jump at launch/incorrect surface values |
| DataStreams: | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | There are two problems here. First, the operator entered the values of PTU obtained from the THWAPS as the surface values for this sounding instead of the sonde values. In doing so, the surface pressure was entered incorrected (OMIS log shows both sonde and THWAPS at 969.0), surface value is entered as 969.9. The second problem is that apparently the system misidentified the time of release and as a result the ascent rates are wrong for the first 30 seconds. The time of release problem was caused because the operator started a new sonde instead of resetting the system. I am assuming that the values of PTU are correct, but I have no way of knowing the relationship betweeen the time into the sounding and the actual altitude/pressures. It seems likely that the altitudes are OK but that they do not correspond to the actual times after phyical launch. |
| Measurements: | sgpsondewrpnB1.00:
sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/22/1999 | 0230 | 03/22/1999 | 0230 |
| Subject: | Incorrect surface RH |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | The operator entered an incorrect value (7.5%) for the surface RH for this sounding. The correct value should have been 70%. The operator noticed the error after the sounding had been completed and reported it in his log. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/10/1999 | 1130 | 05/11/1999 | 2041 |
| Subject: | SGP/SONDE - RH probably biased low in several soundings |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | In the process of moving storage facilties, site operations uncovered some old radiosondes (vintage April 1998) that were used in several soundings starting on May 10 at 0530 and continuing at least through May 11 at 2040. Because these sondes are so old and pre-date Vaisala's repackaging they are likely subject to the sensor contamination problem that results in a dry bias in RH. The sondes in question have serial numbers 816XXXXXX. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/18/1999 | 0530 | 12/18/1999 | 0530 |
| Subject: | SGP/SONDE - Incorrect surface temperature |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | The operator entered 20.0 degrees rather than the true temperature of 2.0 degrees. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/22/1999 | 2330 | 12/22/1999 | 2330 |
| Subject: | SGP/SONDE - Incorrect surface temperature |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | The operator entered the surface temperature as 25 degC rather than the correct 2.5 deg C. This is the second time in a week this type of error has occurred. I have sent a separate e-mail to site ops. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|