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 |
D000625.1 | SGP/SONDE/C1 - Operator used wrong calibration tape | sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1 |
D000801.2 | SGP/SONDE/C1 - Incorrect absolute pressure | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1 |
D001107.1 | SGP/SONDE/C1 - Incorrect surface temperature | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D011207.3 | SGP/SONDE/C1 - Bad temp (other?) data in 12/3/01:2328 sounding | sgpsondeC1.00, sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D011231.1 | SGP/SONDE/C1 - Bad temperature in CF sounding 12/22/01:0527 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D011231.2 | SGP/SONDE/C1 - Bad temperature data CF sounding 12/28/01:2326 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020110.1 | SGP/SONDE/C1 - Bad temperature in SGP/CF sounding 20020108:0528 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020524.27 | SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RH | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020526.1 | SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020611.2 | SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etc | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020626.34 | SGP/SONDE/C1 - Incorrect Surface Pressure | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020626.35 | SGP/SONDE/C1 - Bad Temperature Sensor | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020703.1 | SGP/SONDE/C1 - Temperature sensor failure | sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020909.1 | SGP/SONDE/C1 - Bad Temperature Sensor | sgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020909.2 | SGP/SONDE/C1 - Bad Temperature Sensor | sgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021006.1 | Bad temperature sensor | sgplssondeC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021117.1 | SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021121.1 | SGP/SONDE/C1 - Contaminated by interference | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021123.2 | SGP/SONDE/C1 - Interference CF sounding 20021120:0225 | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021201.1 | SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030114.1 | SGP/SONDE/C1 - Bad RH Data | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030122.1 | SGP/SONDE/C1 - Broken temperature sensor SGP/CF sounding | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030206.5 | SGP/SONDE/C1 - Bad temperature/RH | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030312.10 | SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgp1mwravgC1.c1, sgp5mwravgC1.c1 |
D030330.1 | SGP/Sonde/C1 - Bad temperature, RH | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030409.1 | SGP/Sonde/C1 - Bad RH in sounding | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030411.1 | SGP/Sonde/C1 - Sondes launched an hour early | sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030411.2 | SGP/Sonde/C1 - Incorrect surface temperature on CF sounding | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030411.3 | SGP/Sonde/C1 - Failed Sonde Launches due to Antenna problems | sgpsondeC1.00, sgplssondeC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030419.2 | SGP/SONDE/C1 - Broken Temperature Sensor | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030427.1 | SGP/SONDE/C1 - Broken temperature sensor | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030507.3 | SGP/SONDE/C1 - Broken temperature sensors | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030614.1 | SGP/SONDE/C1 - Broken temperature sensor | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030707.7 | SGP/SONDE/C1 - Incorrect surface RH value. | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030722.1 | SGP/SONDE/C1 - Broken temperature sensor | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D030807.1 | SGP/SONDE/C1 - A few bad temperature values at the beginning of the sounding | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D031112.1 | SGP/SONDE/C1 - Broken temperature sensor | sgpsondewnpnC1.b1 |
D050722.1 | SGP/MWR/C1 - REPROCESS - Revised Retrieval Coefficients | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpqmemwrcolC1.c1 |
D060928.3 | SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry | sgpsondewnpnC1.b1 |
D100803.3 | SGP/SONDE/C1 - Sensor failure | sgpsondewnpnC1.b1 |
D960122.1 | Jump in pressure value upon launch | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960122.2 | Jump in pressure value upon launch | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960202.2 | bad pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960223.1 | Incorrect surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960223.2 | Incorrect surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960403.1 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960405.1 | SGP/MWR/C1 - Loss of thermal stabilization | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgp1mwravgC1.c1, sgp5mwravgC1.c1 |
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 |
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 |
D961120.1 | SGP/MWR/B1/B4/B5/B6/C1 - Thermal Stabilization Adjustment | sgpmwrlosB1.a0, sgpmwrlosB1.a1, sgpmwrlosB4.a0, sgpmwrlosB4.a1, sgpmwrlosB5.a0, sgpmwrlosB5.a1, sgpmwrlosB6.a0, sgpmwrlosB6.a1, sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgp1mwravgC1.c1, sgp5mwravgB1.c1, sgp5mwravgB4.c1, sgp5mwravgB5.c1, sgp5mwravgB6.c1, sgp5mwravgC1.c1 |
D970111.1 | Incorrect surface temperature | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D970318.2 | Questionable RH | sgpsondewrpnC1.a1 |
D970507.2 | Jump in pressure value | sgpsondewrpnC1.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 |
D970923.2 | Pressure jump at launch | sgpsondewrpnC1.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 |
D980126.2 | Incorrect surface temperature and humidity | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D980506.1 | Incorrect surface values | sgpsondewrpnC1.a1 |
D980507.4 | Incorrect surface pressure | sgpsondewrpnC1.a1 |
D980511.2 | Incorrect surface pressure | sgpsondewrpnC1.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 | 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, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, sgpsondeptuC1.00, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, 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, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1 |
D990210.1 | SGP/SONDE - Wrong cal tape | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1 |
D990303.1 | SGP/SONDE - Pressure jump at launch | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.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.a1:
sgpsondewrpnC1.a0:
|
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: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
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: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
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, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1 |
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: | sgpsondewndcalcC1.c1:
sgpsondewrpnC1.00:
sgpsondeC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
sgpsondeC1.a1:
sgpsondeC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/25/2000 | 0533 | 07/25/2000 | 0724 |
Subject: | SGP/SONDE/C1 - Incorrect absolute pressure |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1 |
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: | sgpsondewndcalcC1.c1:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
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: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/03/2001 | 2328 | 12/04/2001 | 0158 |
Subject: | SGP/SONDE/C1 - Bad temp (other?) data in 12/3/01:2328 sounding |
DataStreams: | sgpsondeC1.00, sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It looks as though the temperature sensor was damaged on launch. The recorded temp goes from 16.4 at the surface to -42.6 at 2 seconds into the flight. The temperature never exceeds -42 though the RH and pressure look reasonable, but probably should be considered questionable. |
Measurements: | sgpsondewnpnC1.00:
sgpsondeC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/22/2001 | 0527 | 12/22/2001 | 0659 |
Subject: | SGP/SONDE/C1 - Bad temperature in CF sounding 12/22/01:0527 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature data in this sounding look bad after the first value. The temperature series is 11.4, 2.6, -14.3, -32.4 in the first 6 seconds of flight. I don't know why this occurred, but it obviously is incorrect. The pressure and RH data look reasonable. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/28/2001 | 2326 | 12/29/2001 | 0045 |
Subject: | SGP/SONDE/C1 - Bad temperature data CF sounding 12/28/01:2326 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature data in this sounding are bad from approximately 16 seconds into the flight. The temperature series is 9.9, 10.8, 11.3, 1.5, 11.6, 11.6, 11.6, -32.2 and remains below -30 degC. I don't know why this occurred, but it clearly is incorrect. The pressure data looks OK as does the RH, though the RH data are missing (probably sensor failure) above roughly 3.5 km. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/08/2002 | 0528 | 01/08/2002 | 0714 |
Subject: | SGP/SONDE/C1 - Bad temperature in SGP/CF sounding 20020108:0528 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | Temperature values in this sounding went from 3.5 degC at the surface to -33.3 degC at the next sample. It appears that all the remaining temperature values have an approximate -35 degC offset. The pressure and RH values appear reasonable. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/22/2002 | 1130 | 05/22/2002 | 1347 |
Subject: | SGP/SONDE/C1 - CF sounding 20020522:1130 bad temperature/RH |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the sonde sensor boom was damaged upon launch. The result is that no RH data are reported and the reported temperature is something on the order of 60 degC too low. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/23/2002 | 1129 | 05/23/2002 | 1322 |
Subject: | SGP/SONDE/C1 - Bad T/RH data in CF sounding 20020523:1129 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the sensor boom was damaged shortly after launch. The temperature reading jumps -60 degC and the RH goes to 0. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/09/2002 | 0229 | 06/09/2002 | 0236 |
Subject: | SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etc |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature and RH for this sounding look bad, either because of interference from another sonde or because the temperature sensor was broken on launch. The sounding terminated early in any event. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/17/2002 | 1128 | 06/17/2002 | 1313 |
Subject: | SGP/SONDE/C1 - Incorrect Surface Pressure |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the operator made a typographical error when entering the surface pressure. The file has 987.0 hPa and it probably should be 978.0 which would be consistent with the first sample provided by the radiosonde (977.3 hPa), the surface pressures recorded for the adjacent soundings, and the THWAPS pressure. Because the sounding altitude is calculated assuming the surface pressure is correct, the altitude values for the entire flight and the ascent rate values for the first 30 seconds of the sounding will be incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/19/2002 | 2329 | 06/20/2002 | 0036 |
Subject: | SGP/SONDE/C1 - Bad Temperature Sensor |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the temperature sensor broke shortly after launch. As a result, the temperature and dewpoint values are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/27/2002 | 1728 | 06/27/2002 | 1908 |
Subject: | SGP/SONDE/C1 - Temperature sensor failure |
DataStreams: | sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | Temperature sensor broke at launch. All temperature-related variables are incorrect. |
Measurements: | sgpqmemwrcolC1.c1:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/06/2002 | 1727 | 09/06/2002 | 1854 |
Subject: | SGP/SONDE/C1 - Bad Temperature Sensor |
DataStreams: | sgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the temperature sensor broke upon launch and therefore the reported temperature is approximately 40 degC too low. |
Measurements: | sgplssondeC1.c1:
sgpqmemwrcolC1.c1:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/06/2002 | 0527 | 09/06/2002 | 0718 |
Subject: | SGP/SONDE/C1 - Bad Temperature Sensor |
DataStreams: | sgplssondeC1.c1, sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the temperature sensor broke shortly after launch. Temperatures are offset by approxmiately (but not constantly) 40 degC. |
Measurements: | sgplssondeC1.c1:
sgpqmemwrcolC1.c1:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/03/2002 | 1120 | 10/03/2002 | 1320 |
Subject: | Bad temperature sensor |
DataStreams: | sgplssondeC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the temperture sensor broke a few seconds into flight. This results in an unreasonably low temperature for the rest of the flight. For some reason, the rh values also go missing shortly after launch. Only the wind and pressure data are reliable. |
Measurements: | sgplssondeC1.c1:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/13/2002 | 2044 | 11/13/2002 | 2205 |
Subject: | SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The RH data in this sounding is erratic between 2km and 10 km, oscillating between reasonable values (~40%RH) and zero. I certainly doubt that this is a real, heretofore unreported, atmospheric phenomenon so I have to conclude that something is probably wrong with the sensor. I have not seen this behavior before. One would have to look at the absolutely raw RH data to explore further. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/19/2002 | 1423 | 11/19/2002 | 1623 |
11/19/2002 | 1726 | 11/19/2002 | 1917 |
11/19/2002 | 2026 | 11/19/2002 | 2204 |
Subject: | SGP/SONDE/C1 - Contaminated by interference |
DataStreams: | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | These three soundings are contaminated by interference from another radiosonde. It is not clear why; this doesn't usually happen at the CF where the operators are very experienced and frequency separation is not usually a problem. |
Measurements: | sgpsondeC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/20/2002 | 0225 | 11/20/2002 | 0412 |
Subject: | SGP/SONDE/C1 - Interference CF sounding 20021120:0225 |
DataStreams: | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | Like several soundings on 11/19, this sounding was affected by interference from another radiosonde. |
Measurements: | sgpsondeC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/21/2002 | 1130 | 11/21/2002 | 1311 |
Subject: | SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The RH samples in this sounding oscillate between reasonable values (60-80%) and zero. This may be a problem with the RH sensor or the software that alternates between the heated and non-heated RH elements. In either case, the reported values are questionable. More investigation of the raw binary data would be required to diagnose further. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/11/2003 | 0536 | 01/11/2003 | 0551 |
Subject: | SGP/SONDE/C1 - Bad RH Data |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The RH values during the first 15 minutes of this sounding oscillate between reasonable values and near-zero values. The oscillation is irregular and seems to be related to failure of the RH sensor heating process. I have informed Vaisala of the problem and provided raw data files to them for analysis. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/19/2003 | 1134 | 01/19/2003 | 1259 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor SGP/CF sounding |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The radiosonde temperature sensor apparently broke during launch. This results in bad temperature, dew point, and rh data. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/02/2003 | 1732 | 02/02/2003 | 1832 |
Subject: | SGP/SONDE/C1 - Bad temperature/RH |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke shortly after launch. All temperature and RH-related data are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/17/1999 | 1800 | 07/31/2002 | 2034 |
Subject: | SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgp1mwravgC1.c1, sgp5mwravgC1.c1 |
Description: | Several related and recurring problems with the SGP MWRs have been reported dating back to 1999. These problems were due to the occurrence of blackbody signals (in counts) that were half of those expected. The symptoms included noisy data (especially at Purcell), spikes in the data (especially at Vici), negative brightness temperatures, and apparent loss of serial communication between the computer and the radiometer, which results in a self-termination of the MWR program (especially at the CF). Because these all initially appeared to be hardware-related problems, the instrument mentor and SGP site operations personnel (1) repeatedly cleaned and replaced the fiber optic comm. components, (2) swapped radiometers, (3) sent radiometers back to Radiometrics for evaluation (which has not revealed any instrument problems), and (4) reconfigured the computer's operating system. Despite several attempts to isolate and correct it, the problem persisted. It became apparent that some component of the Windows98 configuration conflicted with the DOS-based MWR program or affected the serial port or the contents of the serial port buffer. This problem was finally corrected by upgrading the MWR software with a new Windows-compatible program. |
Measurements: | sgp5mwravgC1.c1:
sgp1mwravgC1.c1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/18/2003 | 1132 | 03/18/2003 | 1322 |
03/20/2003 | 1131 | 03/20/2003 | 1140 |
03/20/2003 | 1731 | 03/20/2003 | 1904 |
Subject: | SGP/Sonde/C1 - Bad temperature, RH |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | These three soundings all show the effects of a temperature sensor broken at launch. The temperature, RH, dew-point values all are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/2003 | 1144 | 04/06/2003 | 1203 |
Subject: | SGP/Sonde/C1 - Bad RH in sounding |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The RH sensor heating circuit was out of synch from about 400 sec after launch until the circuit was turned off whent he sounding temperature reached approximately 233 degK (-40 degC) about 1500 sec after launch. During this time period the reported RH oscillates between reasonable values and near-zero values. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/2003 | 2200 | 04/07/2003 | 0700 |
Subject: | SGP/Sonde/C1 - Sondes launched an hour early |
DataStreams: | sgpsondewnpnC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It looks like someone forgot to set his/her clock ahead. The sounding that should have been done at 23:30 UTC on 4/6 was done at 22:38 and the following sounding, which should have been done at 0530 on 4/7 was done at 04:31. The subsequent soundings all are done at the correct times. |
Measurements: | sgpsondewnpnC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/06/2003 | 2238 | 04/06/2003 | 2238 |
Subject: | SGP/Sonde/C1 - Incorrect surface temperature on CF sounding |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the operator entered an incorrect value for surface temperature. Rather than 43.2 degC in the file, the value is most likely 19. degC (thwaps reading 19.4, first sonde reading aloft 18.6). |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2003 | 1730 | 04/01/2003 | 1930 |
04/02/2003 | 0530 | 04/02/2003 | 0730 |
04/02/2003 | 1130 | 04/02/2003 | 1330 |
Subject: | SGP/Sonde/C1 - Failed Sonde Launches due to Antenna problems |
DataStreams: | sgpsondeC1.00, sgplssondeC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | These sonde launches where unsuccessful due to problems with the antenna configuration resulting in signal loss before the launch. |
Measurements: | sgplssondeC1.c1:
sgpsondeC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/15/2003 | 2332 | 04/16/2003 | 0124 |
Subject: | SGP/SONDE/C1 - Broken Temperature Sensor |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke shortly after launch as a result all variables that are affected by temperature are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/18/2003 | 1130 | 04/18/2003 | 1310 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensor on this radiosonde broke after launch. All temperature-related variables (dp, tdry, rh) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/04/2003 | 1130 | 05/04/2003 | 1145 |
05/04/2003 | 2330 | 05/05/2003 | 0116 |
Subject: | SGP/SONDE/C1 - Broken temperature sensors |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensors broke at launch on both of these soundings. All of the temperature-related data (tdry, rh, dp) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/09/2003 | 1730 | 06/09/2003 | 1737 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke at launch on this sounding. All of the temperature-related data (tdry, rh, dp) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/22/2003 | 2331 | 06/22/2003 | 2331 |
Subject: | SGP/SONDE/C1 - Incorrect surface RH value. |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The surface RH value, reported as 0%RH should be 52%. This resulted from a typographical error by the operator when entering the surface data. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/19/2003 | 1730 | 07/19/2003 | 1930 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke at launch on this sounding. All of the temperature-related data (tdry, rh, dp) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/02/2003 | 1725 | 08/02/2003 | 1726 |
Subject: | SGP/SONDE/C1 - A few bad temperature values at the beginning of the sounding |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | I've never seen this before. The temperature reported by the radiosonde dropped over 30 degC just after launch (usually a symptom of a broken temperature sensor), but then recovered after 14 seconds of bad readings. The temperatures from 2 seconds through 14 seconds after launch are incorrect, the remainder of the sounding looks fine. I have sent the data files to Vaisala for their consideration. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2003 | 1133 | 11/01/2003 | 1315 |
Subject: | SGP/SONDE/C1 - Broken temperature sensor |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The temperature sensor broke at launch on this sounding. All of the temperature-related data (tdry, rh, dp) are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/16/2002 | 2000 | 06/28/2005 | 2300 |
Subject: | SGP/MWR/C1 - REPROCESS - Revised Retrieval Coefficients |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1, sgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpqmemwrcolC1.c1 |
Description: | IN THE BEGINNING (June 1992), the retrieval coefficients used to derive the precipitable water vapor (PWV) and liquid water path (LWP) from the MWR brightness temperatures were based on the Liebe and Layton (1987) water vapor and oxygen absorption model and the Grant (1957) liquid water absorption model. Following the SHEBA experience, revised retrievals based on the more recent Rosenkranz (1998) water vapor and oxygen absorption models and the Liebe (1991) liquid waer absorption model were developed. The Rosenkranz water vapor absorption model resulted a 2 percent increase in PWV relative to the earlier Liebe and Layton model. The Liebe liquid water absorption model decreased the LWP by 10% relative to the Grant model. However, the increased oxygen absorption caused a 0.02-0.03 mm (20-30 g/m2) reduction in LWP, which was particularly significant for low LWP conditions (i.e. thin clouds encountered at SHEBA). Recently, it has been shown (Liljegren, Boukabara, Cady-Pereira, and Clough, TGARS v. 43, pp 1102-1108, 2005) that the half-width of the 22 GHz water vapor line from the HITRAN compilation, which is 5 percent smaller than the Liebe and Dillon (1969) half-width used in Rosenkranz (1998), provided a better fit to the microwave brightness temperature measurements at 5 frequencies in the range 22-30 GHz, and yielded more accurate retrievals. Accordingly, revised MWR retrieval coefficients have been developed using MONORTM, which utilizes the HITRAN compilation for its spectroscopic parameters. These new retrievals provide 3 percent less PWV and 2.6 percent greater LWP than the previous retrievals based on Rosenkranz (1998). Although the MWR data will be reprocessed to apply the new monortm-based retrievals, for most purposes it will be sufficient to correct the data using the following factors: PWV_MONORTM = 0.9695 * PWV_ROSENKRANZ LWP_MONORTM = 1.026 * LWP_ROSENKRANZ The Rosenkranz-based retrieval coefficients became active as follows (BCR 456): SGP/C1 (Lamont) 4/16/2002, 2000 SGP/B1 (Hillsboro) 4/12/2002, 1600 SGP/B4 (Vici) 4/15/2002, 2300 SGP/B5 (Morris) 4/15/2002, 2300 SGP/B6 (Purcell) 4/16/2002, 2200 SGP/E14(Lamont) 4/16/2002, 0000 NSA/C1 (Barrow) 4/25/2002, 1900 NSA/C2 (Atqasuk) 4/18/2002, 1700 TWP/C1 (Manus) 5/04/2002, 0200 TWP/C2 (Nauru) 4/27/2002, 0600 TWP/C3 (Darwin) inception The MONORTM-based retrieval coefficients became active as follows (BCR 984): SGP/C1 (Lamont) 6/28/2005, 2300 SGP/B1 (Hillsboro) 6/24/2005, 2100 SGP/B4 (Vici) 6/24/2005, 2100 SGP/B5 (Morris) 6/24/2005, 2100 SGP/B6 (Purcell) 6/24/2005, 1942 SGP/E14(Lamont) 6/28/2005, 2300 NSA/C1 (Barrow) 6/29/2005, 0000 NSA/C2 (Atqasuk) 6/29/2005, 0000 TWP/C1 (Manus) 6/30/2005, 2100 TWP/C2 (Nauru) 6/30/2005, 2100 TWP/C3 (Darwin) 6/30/2005, 2100 PYE/M1 (Pt. Reyes) 4/08/2005, 1900** ** At Pt. Reyes, the original retrieval coefficients implemented in March 2005 were based on a version of the Rosenkranz model that had been modified to use the HITRAN half-width at 22 GHz and to be consistent with the water vapor continuum in MONORTM. These retrievals yield nearly identical results to the MONORTM retrievals. Therefore the Pt. Reyes data prior to 4/08/2005 may not require reprocessing. |
Measurements: | sgp5mwravgC1.c1:
sgpmwrtipC1.a1:
sgpqmemwrcolC1.c1:
sgp1mwravgC1.c1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/28/2006 | 1728 | 12/31/9999 | 2359 |
Subject: | SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | The output precision of the following variables was increased 20060928 alt changed from 1m to 0.1m dp changed from 0.1degC to 0.01degC pres changed from 0.1 hPa to 0.01 hPa RH changed from 1%RH to 0.01%RH tdry changed from .1degC to 0.01degC Note that the increase in precision does not necessarily imply an increase in accuracy. Users are cautioned to continue to use their best scientific judgement when using these or any other data. |
Measurements: | sgpsondewnpnC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/12/2002 | 0533 | 06/12/2002 | 0533 |
Subject: | SGP/SONDE/C1 - Sensor failure |
DataStreams: | sgpsondewnpnC1.b1 |
Description: | Temperature sensor failure on sonde. Data is incorrect, do not use. |
Measurements: | sgpsondewnpnC1.b1:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/19/1995 | 0000 | 08/20/1995 | 2359 |
08/26/1995 | 0000 | 09/04/1995 | 2359 |
07/01/1996 | 1825 | 07/23/1996 | 2300 |
Subject: | SGP/MWR/C1 - Loss of thermal stabilization |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgp1mwravgC1.c1, sgp5mwravgC1.c1 |
Description: | Periodically during August and September 1995 all microwave radiometers at the SGP CART generated error messages in the Site Operations Log like: Time: Sat Aug 19 18:41:20 1995 MWRLOS.C1, tkxc: Value above Maximum. This indicates that the temperature of the microwave hardware (specifically, the cross-coupler or "xc") exceeded its controlled temperature (47-52 deg C) at which point it was no longer thermally stabilized and the gain was uncontrolled. During these periods which typically last about 8 hours from about local noon until about sunset the data behave anomalously and should be considered invalid. Specifically the precipitable water vapor increases and the liquid water path decreases (and becomes SIGNIFICANTLY NEGATIVE (-0.1 mm) on clear sky days). The RMS noise level in the data also increases sharply. The 'Tkxc' field appears ONLY in the a0-level data and does NOT appear in either the a1 (mwrlos) or c1 (mwr5avg) files. Therefore THESE ANOMALOUS VALUES HAVE BEEN INCLUDED IN THE 5-MINUTE AVERAGES. The microwave hardware is thermally stabilized to about +/- 0.1 deg C by resistive heating. When the internal temperature rises above the set point the thermal stabilization of the instrument gain is lost. >From an examination of the component temperature data it appears that increasing the set point temperature to about 55 deg C (328 K) would prevent a re-ocurrance of this problem at the SGP. The manufacturer, Radiometrics, concurs that raising the set point will fix this problem and will not cause other problems. I will have to carefully examine the MCTEX data to determine whether this will be a problem for the TWP. The manufacturer and I had discussed this possibility prior to building the TWP MWRs (S/N 015, 016, and 017) and those instruments have set points above 50 deg C. Note that MWR 018 has a set point near 52 deg C (like the TWP models) but it still experienced a few loss-of-stabilization events. Note that the instruments with the lowest set points had the most loss-of-stabilization events. |
Measurements: | sgp5mwravgC1.c1:
sgp1mwravgC1.c1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
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.a1:
sgpsondewrpnC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/01/1996 | 0000 | 08/31/1996 | 2359 |
Subject: | SGP/MWR/B1/B4/B5/B6/C1 - Thermal Stabilization Adjustment |
DataStreams: | sgpmwrlosB1.a0, sgpmwrlosB1.a1, sgpmwrlosB4.a0, sgpmwrlosB4.a1, sgpmwrlosB5.a0, sgpmwrlosB5.a1, sgpmwrlosB6.a0, sgpmwrlosB6.a1, sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgp1mwravgC1.c1, sgp5mwravgB1.c1, sgp5mwravgB4.c1, sgp5mwravgB5.c1, sgp5mwravgB6.c1, sgp5mwravgC1.c1 |
Description: | In order to correct a thermal stabilization problem identified earlier I adjusted the thermal set point of the microwave radiometers at the SGP upward from 48-50 deg C to 55 deg C in early August 1996 according to the schedule given below. B6 5 August 1996 C1 6 August 1996 B1 7 August 1996 B5 8 August 1996 Subsequent to making this adjustment the MWRs were put in TIP mode to check on whether the change in set point temperature affected their calibration. Because clear sky conditions were quite intermittent, it is difficult to determine whether the substantial variability in the tip data were attributable to the change in thermal set point. The instrument calibration was not altered in August. Tip data were again collected with these instruments in September prior to the beginning and at the close of the Water Vapor IOP. For example, the calibration of the instrument at the central facility (S/N 10) derived from the September data was essentially the same as that derived from calibration data acquired in February 1996. Although this would lead one to believe that altering the thermal set point did not affect the instrument calibration, it may be that some transient effect was induced. In comparing soundings launched from the central facility with the microwave radiometer there, I noticed that those sondes calibrated in June 1996 consistently reported lower integrated water vapor than the radiometer in July and September (during the IOP) but were in better agreement with the radiometer for the two weeks period immediately after the set point was adjusted. I suspect that adjusting the thermal set point may have temporarily increased the radiometer gain (kelvins/volt) thereby lowering the measured brightness temperature and the retrieved integrated water vapor. It is not clear why a temporary change in gain should occur or even whether it did. But users of the data should be aware that the data from the microwave radiometers at the SGP may be anomalous during August 1996. |
Measurements: | sgpmwrlosB1.a1:
sgpmwrlosB1.a0:
sgp1mwravgC1.c1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
sgp5mwravgB5.c1:
sgp5mwravgB1.c1:
sgp5mwravgB4.c1:
sgpmwrlosB6.a1:
sgp5mwravgC1.c1:
sgpmwrlosB6.a0:
sgpmwrlosB4.a0:
sgpmwrlosB5.a0:
sgpmwrlosB4.a1:
sgpmwrlosB5.a1:
sgp5mwravgB6.c1:
|
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.a1:
sgpsondewrpnC1.a0:
|
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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
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 |
---|---|---|---|
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: | sgpsondewrpnB4.a0:
sgpsondewrpnB5.a0:
sgpsondewrpnB5.a1:
sgpsondewrpnB4.a1:
sgpsondewrpnB1.a1:
sgpsondewrpnB1.a0:
sgpsondewrpnB6.a0:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
sgpsondewrpnB6.a1:
|
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.a1:
sgpsondewrpnC1.a0:
|
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 |
---|---|---|---|
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: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
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: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
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: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
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: | 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, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, sgpsondeptuC1.00, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, 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, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1 |
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: | sgpsondeptuC1.00:
sgpsondeB4.a1:
sgpsondeB4.a0:
DsgpsondeptuB4.00:
sgpsondewrprB1.00:
DsgpsondeC1.a1:
DsgpsondeB5.a0:
DsgpsondeC1.a0:
sgpsondewrpnC1.a1:
sgpsondewnprC1.a1:
DsgpsondenogcptucalcC1.c1:
sgpsondewrpnB5.00:
sgpsondewrpnB4.a0:
sgpsondewnpnB1.a0:
sgpsondewnpnB1.a1:
DsgpsondeB5.a1:
sgpsondewrprB4.a1:
sgpsondewrpnB4.a1:
DsgpsondeB4.a0:
sgpsondewrpnB6.00:
DsgpsondeB4.a1:
sgpsondewrprB4.a0:
DsgpsondeptuB6.00:
sgpsondewnpnC1.a0:
sgpsondewrpnB6.a0:
DsgpsondeptuB5.00:
sgpsondewnpnC1.a1:
DsgpsondenogcwrpnB4.c1:
DsgpsondeB4.00:
sgpsondewrpnB6.a1:
DsgpsondenogcptucalcB4.c1:
DsgpsondeC1.00:
DsgpsondeptuC1.00:
DsgpsondeptucalcB1.c1:
DsgpsondeptucalcB5.c1:
sgpsondewrpnB1.00:
sgpsondewrpnB1.a1:
sgpsondewrpnB1.a0:
DsgpsondeptuB1.00:
DsgpsondeB1.00:
DsgpsondeptucalcB4.c1:
DsgpsondenogcwrpnB5.c1:
sgpsondewrpnB5.a0:
sgpsondewrpnB5.a1:
DsgpsondenogcptucalcB1.c1:
sgpsondeC1.00:
sgpsondewrprB4.00:
sgpsondeB4.00:
sgpsondewrprB1.a0:
sgpsondewrprC1.00:
sgpsondewrprB1.a1:
sgpsondewnpnB5.a0:
sgpsondeB1.a0:
DsgpsondeB5.00:
sgpsondewnpnB5.a1:
sgpsondeB1.a1:
sgpsondewnpnB4.a1:
sgpsondewnpnB6.a0:
sgpsondewnpnB6.a1:
sgpsondewnpnB4.a0:
DsgpsondenogcwrpnB1.c1:
sgpsondeB5.00:
sgpsondeB6.00:
DsgpsondenogcptucalcB5.c1:
sgpsondewrprB5.00:
DsgpsondeptucalcC1.c1:
DsgpsondenogcwrpnC1.c1:
sgpsondeC1.a1:
sgpsondeC1.a0:
DsgpsondeB1.a0:
sgpsondewrpnC1.00:
sgpsondeB5.a0:
sgpsondewrpnB4.00:
sgpsondeB5.a1:
DsgpsondeB1.a1:
sgpsondewrprC1.a1:
sgpsondewrprB5.a0:
sgpsondewrprB5.a1:
sgpsondewrpnC1.a0:
sgpsondewnprC1.a0:
sgpsondeB1.00:
sgpsondewrprC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/09/1999 | 0834 | 02/09/1999 | 1016 |
Subject: | SGP/SONDE - Wrong cal tape |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1 |
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: | sgpsondewndcalcC1.c1:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
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: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
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: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
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: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
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: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
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: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|