DQR ID | Subject | Data Streams Affected |
---|---|---|
D940804.1 | Possible error in humidity ground check | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D941104.1 | Bad surface RH value in sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D941108.2 | Bad surface RH value in sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D941108.4 | CF Sonde Ground Check Corrections | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D941213.1 | Questionable initial values sounding 941209:1133 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D950109.1 | Questionable surface value 1/2/95 11:32 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D950109.2 | Questionable surface value 1/3/95 11:29 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D950304.1 | Reprocess: Sounding 950222:0530 done in research mode | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D950310.1 | Bad surface values in sounding 3/9/95:0530 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D950316.1 | Reprocess: Sounding 950315:1429 done in research mode | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D950417.1 | Reprocess: Sounding 950413:1130 done in research mode | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D950419.1 | Bad surface values in sounding 4/17/95 14:29 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D950816.5 | bad surface tdry value in sounding 17:55 | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D951006.1 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D951006.2 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D951006.3 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D951006.4 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D951006.5 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D951006.6 | Apparent Interference Signal in Sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960122.1 | Jump in pressure value upon launch | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960122.2 | Jump in pressure value upon launch | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960129.1 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960202.2 | bad pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960223.1 | Incorrect surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960223.2 | Incorrect surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960229.2 | SGP/SONDE/C1 - incorrect factory RH calib-radiosondes | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960403.1 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960415.1 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960506.1 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960602.2 | bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960611.3 | bad surface values sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960701.4 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D960706.1 | Bad surface pressure sounding | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D970710.1 | Questionable pressure/altitude data | sgpsondewrpnC1.a1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/13/1994 | 1131 | 08/03/1994 | 1430 |
Subject: | Possible error in humidity ground check |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondewrpnC1 Subject: Possible error in humidity ground check Date Submitted: 8/3/94 Submitted By: Barry Lesht _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: What level data: (raw,a0,a1,b1,c1 etc): raw, a0, a1 What location was the data collected at: CF Period of time in question Begin Date 7/13/94 Time 11:31 (GMT) End Date 8/ 3/94 Time 14:30 (GMT) Data should be labeled: _X_ questionable ___ All data fields affected ___ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: We suspect that the dessicant in the bbss ground check set (located only at the central facility) has become saturated and is no longer providing a 0 %RH environment against which to check the sonde RH sensor. This would result in a bias in the correction for humidity for those soundings that were done during the time the dessicant was bad. Examination of the data suggests that the potential errors are small, (on the order of a few percent RH), but sufficiently different from previous corrections to warrant temporary suspension of the ground check procedure. A review of the data collected since the beginning of the year shows no trend in humidity correction until July 13, 1994. The last positive humidity correction was recorded on July 12, 1994 and since then has been noticably (though slightly) downward. The humidity correction is applied linearly. That is, U = U' + (Uo - Uo') where U is the humidity with the ground check applied (this is the RH value in our data stream), U' is the humidity measured at the sonde before correction, Uo is the reference humidity (assumed to be 0%), and Uo' is is the humidity measured by the sonde in the ground check set. Users can recover the RH measured at the sonde by subtracing the global attribute "humidity-correction" from the RH values in the data set. Based on our experience with the ground check data, we expect the RH values measured at the sonde to be accurate within +/-2% RH. Other observations/measurements impacted by this problem: Any measurement derived from the sonde RH measurement, for example dew point temperature, water vapor mixing ratio). Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data warning user that RH may be biased high by an unknown amount, probably not exceeding 2% RH. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/30/1994 | 2326 | 10/30/1994 | 2326 |
Subject: | Bad surface RH value in sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: SGPSONDEC1 Subject: Bad surface RH value in sounding 10/30/94 23:26 Date Submitted: 11/4/94 Submitted By: Barry Lesht _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: All What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: SGP/CF Period of time in question Begin Date 10/30/94 Time 23:26 (GMT) End Date 10/30/94 Time 23:26 (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It looks as though an incorrect value was entered by the operator for surface relative humidity. The value entered 16% is much lower than the first value given by the radiosonde 80%. The rest of the sounding is consistent with humid, rainy conditions, suggesting a typographical error (16 instead of 76?). Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/06/1994 | 1733 | 11/06/1994 | 1733 |
Subject: | Bad surface RH value in sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: SGPSONDEC1 Subject: Bad surface RH value in sounding 11/6/94 17:33 Date Submitted: 11/8/94 Submitted By: Barry Lesht _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: All What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: SGP/CF Period of time in question Begin Date 11/06/94 Time 17:33 (GMT) End Date 11/06/94 Time 17:33 (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: An incorrect value was entered by the operator for surface relative humidity. The value as entered as 4% should be 45%. This typographical error was noted in the site operations log by the operator shortly after it occurred. The remaining values in the sounding should be fine. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/21/1993 | 1640 | 08/03/1994 | 1430 |
Subject: | CF Sonde Ground Check Corrections |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: SGPSONDEC1 Subject: CF Sonde Ground Check Corrections Date Submitted: 11/8/94 Submitted By: Barry Lesht _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondec1 What level data: (raw,a0,a1,b1,c1 etc): all What location was the data collected at: SGP/CF Period of time in question Begin Date 01/21/93 Time 16:40 (GMT) End Date 08/03/94 Time 14:30 (GMT) Data should be labeled: _?_ questionable ___ All data fields affected ___ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: Between 1/21/93 and 8/3/94 all radiosondes launched from the central facility were ground checked before launch. The ground check procedure consists of placing the sonde sensor arm into a sealed, dessicated chamber containing a certified calibrated mercury thermometer, allowing the sonde to equilibrate, and comparing the sonde output readings for RH and temperature to the thermometer reading and an assumed 0% RH. All data after launch were "corrected" to account for any differences between the sonde output and the reference conditions in the ground check set. Analysis of the population of ground check values shows that the average RH correction was 0% RH and average temperature correction was -0.4 degC. Because there is some question as to whether applying the ground check correction increases or decreases the accuracy of the output data, some investigators may wish to remove the effect of the ground check before using the data in their analyses. Ground checks were suspended on 8/3/94. The algorithms for removing the ground check are: RH (without ground check) = RH (as reported) - humidity_correction Temp (without ground chk) = [Temp (as reported) - FACTOR1]/FACTOR2 where FACTOR1 = [(90*temperature_correction)/(tref+90) FACOTR2 = [1+(temperature_correction)/(tref+90) The variables "humidity_correction" and "temperature_correction" are metadata contained in the netCDF data files from 5/20/93 to 8/3/94. Between 1/21/93 and 5/20/93 these variables were misnamed and are not easily accessible via FORTRAN (see PIF 940917.1). The variable tref is the actual temperature reported by the radiosonde while in the ground check set. This variable is not included in the netCDF file and can be estimated by using a value of 15 degC. The correction function is relatively insensitive to variations in this value. (see PIF 940917.2) FORTRAN routines for reading the metadata and for applying the algorithms to produce "uncorrected" data are available from the instrument mentor. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Send (another) notice to users of the data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/09/1994 | 1133 | 12/09/1994 | 1133 |
Subject: | Questionable initial values sounding 941209:1133 |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondec1 Subject: Questionable initial values sounding 941209:1133 Date Submitted: 12/12/94 Submitted By: Barry Lesht _x_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: All What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: SGP/CF Period of time in question Begin Date 12/09/94 Time 11:33:00 (GMT) End Date 12/09/94 Time 11:33:02 (GMT) Data should be labeled: _x_ questionable ___ All data fields affected ___ incorrect _x_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears that incorrect values were entered for surface temperature and relative humidity in the subject sounding. The values entered were temp = 25.1 degC, rh = 18 %. The next values in the sounding are temp =- 2.4 degC, rh = 70 %. Because these do not appear to be simple typographical errors, the values should be noted as questionable rather than incorrect until the paper log can be consulted by site ops. Initial values for subsequent soundings seem fine. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Check paper log and flag data. Note for possible correction later. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/02/1995 | 1132 | 01/02/1995 | 1132 |
Subject: | Questionable surface value 1/2/95 11:32 |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondec1wrpn Subject: Questionable surface value 1/2/95 11:32 Date Submitted: 1/9/95 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondec1 What level data: (raw,a0,a1,b1,c1 etc): all What location was the data collected at: cf Period of time in question Begin Date 1/02/95 Time 11:32:00 (GMT) End Date 1/02/95 Time 11:32:02 (GMT) Data should be labeled: _x_ questionable ___ All data fields affected ___ incorrect ___ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears that incorrect surface values of temperature and relative humidity were entered for the subject sounding. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/03/1995 | 1129 | 01/03/1995 | 1129 |
Subject: | Questionable surface value 1/3/95 11:29 |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondec1wrpn Subject: Questionable surface value 1/3/95 11:29 Date Submitted: 1/9/95 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondec1 What level data: (raw,a0,a1,b1,c1 etc): all What location was the data collected at: cf Period of time in question Begin Date 1/03/95 Time 11:29:00 (GMT) End Date 1/03/95 Time 11:29:02 (GMT) Data should be labeled: _x_ questionable ___ All data fields affected ___ incorrect ___ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears that incorrect surface values of temperature and relative humidity were entered for the subject sounding. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/22/1995 | 0530 | 02/22/1995 | 0730 |
Subject: | Reprocess: Sounding 950222:0530 done in research mode |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: Subject: Sounding 950222:0530 Done in Research Mode Date Submitted: 3/4/95 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: SGPSONDEC1 What level data: (raw,a0,a1,b1,c1 etc): ALL What location was the data collected at: SGP/CF Period of time in question Begin Date 2/22/95 Time 05:30 (GMT) End Date 2/22/95 Time 07:30 (GMT) Data should be labeled: ___ questionable _X_ All data fields affected ___ incorrect ___ Only some data fields affected ___ wrong calibration _X_ others Discussion of Problem: This sounding was done in RESEARCH mode for both thermodynamic as well as wind data. The normal mode is to for RESEARCH winds only. As a result, both the ascending and descending flights of the sonde are included in the data file and none of the data are smoothed or filtered. Other observations/measurements impacted by this problem: I think that some of the radiation codes that use the sonde data as input don't handle the descending samples well. I'm not sure which ones may be affected. Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Users should be notified and, if (and only if) requested, the sounding could be reprocessed either using the software developed at the EC or the digi-CORA. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/09/1995 | 0530 | 03/09/1995 | 0530 |
Subject: | Bad surface values in sounding 3/9/95:0530 |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Bad surface values in sounding 3/9/95:0530 Date Submitted: 3/10/95 Submitted By: _x_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: What level data: (raw,a0,a1,b1,c1 etc): all What location was the data collected at: sgp/cf Period of time in question Begin Date 3/09/95 Time 05:30 (GMT) End Date 3/09/95 Time 05:30 (GMT) Data should be labeled: ___ questionable ___ All data fields affected _x_ incorrect _x_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears that the operator entered incorrect values for the surface temperature and humidity for this sounding. The entered values are 24.8 degC (temp) and 19 %RH (humidity) which are most likely the values obtained from the met instruments inside the trailer rather from the sonde on the launch platfrom. The next sample values of -3.1 degC (temp) and 81 %RH (humidity) appear to be valid. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/15/1995 | 1429 | 03/15/1995 | 1629 |
Subject: | Reprocess: Sounding 950315:1429 done in research mode |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | P950316.1 Barry Lesht SGP/SONDE.C1.950315.950315 - Sounding 950315:1429 Done in Research Mode DQR No: Platform: Subject: Sounding 950315:1429 Done in Research Mode Date Submitted: 3/4/95 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: SGPSONDEC1 What level data: (raw,a0,a1,b1,c1 etc): ALL What location was the data collected at: SGP/CF Period of time in question Begin Date 3/15/95 Time 14:29 (GMT) End Date 3/15/95 Time 16:29 (GMT) Data should be labeled: ___ questionable _X_ All data fields affected ___ incorrect ___ Only some data fields affected ___ wrong calibration _X_ others Discussion of Problem: This sounding was done in RESEARCH mode for both thermodynamic as well as wind data. The normal mode is to for RESEARCH winds only. As a result, both the ascending and descending flights of the sonde are included in the data file and none of the data are smoothed or filtered. Other observations/measurements impacted by this problem: I think that some of the radiation codes that use the sonde data as input don't handle the descending samples well. I'm not sure which ones may be affected. Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Users should be notified and, if (and only if) requested, the sounding could be reprocessed either using the software developed at the EC or the digi-CORA. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/13/1995 | 1130 | 04/13/1995 | 1330 |
Subject: | Reprocess: Sounding 950413:1130 done in research mode |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: Subject: Sounding 950413:1130 Done in Research Mode Date Submitted: 4/17/95 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: SGPSONDEC1 What level data: (raw,a0,a1,b1,c1 etc): ALL What location was the data collected at: SGP/CF Period of time in question Begin Date 4/13/95 Time 11:30 (GMT) End Date 4/13/95 Time 13:30 (GMT) Data should be labeled: ___ questionable _X_ All data fields affected ___ incorrect ___ Only some data fields affected ___ wrong calibration _X_ others Discussion of Problem: This sounding was done in RESEARCH mode for both thermodynamic as well as wind data. The normal mode is to for RESEARCH winds only. As a result, both the ascending and descending flights of the sonde are included in the data file and none of the data are smoothed or filtered. Other observations/measurements impacted by this problem: I think that some of the radiation codes that use the sonde data as input don't handle the descending samples well. I'm not sure which ones may be affected. Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Users should be notified and, if (and only if) requested, the sounding could be reprocessed either using the software developed at the EC or the digi-CORA. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/17/1995 | 1429 | 04/17/1995 | 1551 |
Subject: | Bad surface values in sounding 4/17/95 14:29 |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: SGPSONDEC1 Subject: Bad surface values in sounding 4/17/95 14:29 Date Submitted: 4/19/95 Submitted By: Barry Lesht _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: All What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: SGP/CF Period of time in question Begin Date 4/17/95 Time 14:29 (GMT) End Date 4/17/95 Time 15:51 (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The operator entered incorrect surface values for both RH and pressure. Because of the way altitude is calculated, the incorrect pressure value has the effect of making all subsequent altitude values incorrect. The RH error only affects the first sample. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/11/1995 | 1755 | 08/11/1995 | 1755 |
Subject: | bad surface tdry value in sounding 17:55 |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: SGPSONDEC1 Subject: Bad surface tdry value in sounding 8/11/95 17:55 Date Submitted: 8/16/95 Submitted By: Barry Lesht _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: All What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: SGP/CF Period of time in question Begin Date 8/11/95 Time 17:55 (GMT) End Date 8/11/95 Time 17:55 (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: An incorrect value was entered by the operator for surface temperature. The value entered as 28.8 should be 31.8. This error was noted in the site operations log by the operator shortly after it occurred. The remaining values in the sounding should be fine. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/03/1995 | 0000 | 10/03/1995 | 0100 |
Subject: | Apparent Interference Signal in Sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sondeC1 Subject: Apparent Interference Signal in Sounding CF:951002:2330 Date Submitted: October 6, 1995 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: What level data: (raw,a0,a1,b1,c1 etc): All What location was the data collected at: CF Period of time in question Begin Date 10/03/95 Time XX:XX:XX (GMT) End Date 10/03/95 Time 00:54:12 (GMT) Data should be labeled: ___ questionable _X_ All data fields affected _X_ incorrect ___ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears as if the ground station started to receive data from a foreign sonde (i.e., not the sonde originally being tracked) at an altitude of about 14.5 km. At this point the RH signal drops out, and both the pressure and temperature signals are noisy and look unnatural. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/03/1995 | 0000 | 10/03/1995 | 0940 |
Subject: | Apparent Interference Signal in Sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sondeC1 Subject: Apparent Interference Signal in Sounding CF:951003:0830 Date Submitted: October 6, 1995 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: What level data: (raw,a0,a1,b1,c1 etc): All What location was the data collected at: CF Period of time in question Begin Date 10/03/95 Time XX:XX:XX (GMT) End Date 10/03/95 Time 09:40:20 (GMT) Data should be labeled: ___ questionable _X_ All data fields affected _X_ incorrect ___ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears as if the ground station started to receive data from a foreign sonde (i.e., not the sonde originally being tracked) at an altitude of about 14.0 km. At this point the RH signal drops out, and both the pressure and temperature signals are noisy and look unnatural. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/03/1995 | 0000 | 10/03/1995 | 1525 |
Subject: | Apparent Interference Signal in Sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sondeC1 Subject: Apparent Interference Signal in Sounding CF:951003:1429 Date Submitted: October 6, 1995 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: What level data: (raw,a0,a1,b1,c1 etc): All What location was the data collected at: CF Period of time in question Begin Date 10/03/95 Time XX:XX:XX (GMT) End Date 10/03/95 Time 15:25:24 (GMT) Data should be labeled: ___ questionable _X_ All data fields affected _X_ incorrect ___ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears as if the ground station started to receive data from a foreign sonde (i.e., not the sonde originally being tracked) at an altitude of about 12.7 km. At this point the RH signal drops out, and both the pressure and temperature signals are noisy and look unnatural. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/04/1995 | 0000 | 10/04/1995 | 0707 |
Subject: | Apparent Interference Signal in Sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sondeC1 Subject: Apparent Interference Signal in Sounding CF:951004:0530 Date Submitted: October 6, 1995 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: What level data: (raw,a0,a1,b1,c1 etc): All What location was the data collected at: CF Period of time in question Begin Date 10/04/95 Time XX:XX:XX (GMT) End Date 10/04/95 Time 07:07:50 (GMT) Data should be labeled: ___ questionable _X_ All data fields affected _X_ incorrect ___ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears as if the ground station started to receive data from a foreign sonde (i.e., not the sonde originally being tracked) at an altitude of about 12.0 km. At this point the RH signal drops out, and both the pressure and temperature signals are noisy and look unnatural. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/04/1995 | 0000 | 10/04/1995 | 0945 |
Subject: | Apparent Interference Signal in Sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sondeC1 Subject: Apparent Interference Signal in Sounding CF:951004:0834 Date Submitted: October 6, 1995 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: What level data: (raw,a0,a1,b1,c1 etc): All What location was the data collected at: CF Period of time in question Begin Date 10/04/95 Time XX:XX:XX (GMT) End Date 10/04/95 Time 09:45:30 (GMT) Data should be labeled: ___ questionable _X_ All data fields affected _X_ incorrect ___ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears as if the ground station started to receive data from a foreign sonde (i.e., not the sonde originally being tracked) at an altitude of about 11.5 km. At this point the RH signal and the pressure and temperature signals are noisy and look unnatural. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/04/1995 | 0000 | 10/04/1995 | 1312 |
Subject: | Apparent Interference Signal in Sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sondeC1 Subject: Apparent Interference Signal in Sounding CF:951004:1130 Date Submitted: October 6, 1995 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: What level data: (raw,a0,a1,b1,c1 etc): All What location was the data collected at: CF Period of time in question Begin Date 10/04/95 Time XX:XX:XX (GMT) End Date 10/04/95 Time 13:12:02 (GMT) Data should be labeled: ___ questionable _X_ All data fields affected _X_ incorrect ___ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears as if the ground station started to receive data from a foreign sonde (i.e., not the sonde originally being tracked) at an altitude of about 17.0 km. At this point the RH signal drops out and the pressure and temperature signals are noisy and look unnatural. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/17/1996 | 2031 | 01/17/1996 | 2031 |
Subject: | Jump in pressure value upon launch |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: SGPSONDEC1 Subject: Jump in pressure value upon launch 960117:2031 Date Submitted: 1/22/96 Submitted By: Barry Lesht _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondeWRPNC1/ (alt, asc, press) What level data: (raw,a0,a1,b1,c1 etc): all What location was the data collected at: SGP/CF Period of time in question Begin Date 1/17/96 Time 20:31 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears that the pressure sensor was jarred during launch and jumped readings from 975.4 hPa at the surface to 950.2 hPa at the first sample after launch. This results in erroneous altitude values throughout the sounding and erroneous ascent rate values during the first 30 seconds. The relative altitude calculations after the second sample should be correct. Although the surface wind speed was recorded at 10.3 m/s, the next wind value is reported as 18.2 m/s - quite strong. The bouncing of the balloon during the launch might account for the abnormal jarring of the sonde. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/18/1996 | 0533 | 01/18/1996 | 0533 |
Subject: | Jump in pressure value upon launch |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: SGPSONDEC1 Subject: Jump in pressure value upon launch 960118:0533 Date Submitted: 1/22/96 Submitted By: Barry Lesht _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondeWRPNC1/ (alt, asc, press) What level data: (raw,a0,a1,b1,c1 etc): all What location was the data collected at: SGP/CF Period of time in question Begin Date 1/18/96 Time 05:33 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: It appears that the pressure sensor was jarred during launch and jumped readings from 973.1 hPa at the surface to 960.7 hPa at the first sample after launch. This results in erroneous altitude values throughout the sounding and erroneous ascent rate values during the first 30 seconds. The relative altitude calculations after the second sample should be correct. The surface winds were quite strong, 16.5 m/s. The bouncing of the balloon during the launch might account for the abnormal jarring of the sonde. Other observations/measurements impacted by this problem: Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/13/1995 | 0531 | 12/13/1995 | 0531 |
Subject: | Bad surface pressure sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Bad surface pressure sounding 12/13/95:0531 Date Submitted: 1/29/96 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 12/13/95 Time 05:31 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The surface pressure for this sounding was entered by the operator as 1010 hPa. The first pressure value reported by the sonde is 971.8 hPa. Pressure at SMOS13 at 05:30 was 973.7 hPa. The reason for the discrepency between the apparent surface pressure and that entered by the operator is unknown. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/1996 | 1129 | 02/01/1996 | 1129 |
Subject: | bad pressure sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Bad pressure sounding 02/01/96:1129 Date Submitted: 2/01/96 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 02/01/96 Time 11:29 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The surface pressure for this sounding was entered by the operator as 962.6. The first pressure value reported by the sonde is 962.4 hPa. The surface pressure in the previous (0533) and subsequent (1429) soundings were 983.3 and 985.7 respectively. SMOS13 pressures were in the 983+ range during this same period. It appears that the sonde pressure sensor was bad and was used as the source of the surface pressure (this is CF standard procedure). Both the pressure and altitude values for this sounding are likely incorrect. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/21/1996 | 1131 | 02/21/1996 | 1131 |
Subject: | Incorrect surface pressure sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Incorrect surface pressure sounding 960221:1131 Date Submitted: 2/22/96 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 02/21/96 Time 11:31 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The surface pressure for this sounding was entered by the operator as 995.6 hPa. The first pressure value reported by the sonde is 972.3 hPa. It appears that the operator entered sea-level pressure reported by the WeatherMeasureII instead of sonde surface pressure. The altitude values for this sounding are likely incorrect. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data and remind operators of current procedures. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/21/1996 | 1430 | 02/21/1996 | 1430 |
Subject: | Incorrect surface pressure sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Incorrect surface pressure sounding 960221:1430 Date Submitted: 2/22/96 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 02/21/96 Time 14:30 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The surface pressure for this sounding was entered by the operator as 995.6 hPa. The first pressure value reported by the sonde is 969.7 hPa. It appears that the operator entered sea-level pressure reported by the WeatherMeasureII instead of sonde surface pressure. The altitude values for this sounding are likely incorrect. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data and remind operators of current procedures. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/20/1995 | 1130 | 09/22/1995 | 1130 |
Subject: | SGP/SONDE/C1 - incorrect factory RH calib-radiosondes |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | Ongoing investigation of differences between preciptiable water vapor measured by the microwave radiometer and precipitable water vapor estimated by integrating the radiosonde-measured profile of water vapor density, along with isolated periods of anomalous behavior in the AERI/LBLRTM QME results led to the suggestion that the calibration of some radiosondes may be suspect. One group of radiosondes, calibrated in November 1994, seemed particularly irregular. I met with the manufacturer on February 7 to show them my results and discuss this issue with them. The manufacturer agreed that the data were suggestive of a calibration problem and offered to review their calibration records for the period in question. The initial results of the manufacture's investigation were sent to me on February 27. The manufacturer found that radiosondes assembled between 10/26/94 and 11/22/94 were incorrectly calibrated. The incorrect calibration affected only the relative humidity measurement; the nature of the calibration error is non-linear, with the radiosondes meeting the specified +/- 2% RH accuracy at both 20%RH (+45 degC) and 0%RH (room temperature). The error in calibration occurs at high RH and low temperature (approximate saturation at -30 degC) and can be as large as 10%RH with the radiosonde reading high. The direction of this error agrees with the observation of negative integrated residuals in the AERI ch 1 region made by Tony Clough and the tendency toward greater than 'normal' differences in PWV when compared to the MWR when these sondes were used. The cause of the calibration error was the addition of new, high RH, quality control check (-30 degC) into the manufacturing stream that required a change in the calibration software. The new software mistakenly loaded an incorrect parameter file that caused the calibration to be off at high RH - this was not noticed at the time because the radiosondes passed the regular production QC checks and the failure to agree at the new QC value was thought to result from a problem with the new reference standard. Troubleshooting the entire calibration system in an effort to incorporate the new QC check was conducted along with normal production, and took about a month to complete. The troubleshooting including adjustment of the calibration software, at which time the correct parameter file happened to be reloaded, and after which the radiosondes met the desired specification at the high RH value. According to the manufacturer, approximately 1900 radiosondes were calibrated during the period in question. Sondes from this period were used at all CART facilities. At least 1178 soundings involving these sondes were included in the QME results I looked at (some QME results were discarded because of problems with either the MWR data or the sounding data). The distribution of these 1178 by facility is: Facility Number of Sondes First Used Last Used (based on QME) CF 316 1/20/95 (11:30) 9/22/95 (11:30) B1 143 2/21/95 (17:30) 9/29/95 ( 8:30) B4 313 4/ 6/95 (17:30) 11/ 7/95 (17:28) B5 153 4/14/95 (17:30) 12/14/95 (17:30) B6 253 3/22/95 (17:30) 10/19/95 (17:30) The sondes can be recognized by decoding the serial_number metadata word in the sounding netCDF file. The serial number of the sondes in question is a number (8 or 9 digit) of the form DDMMYTTPP where DD is the day of the month (leading zero missing in the netCDF data), MM is the month +80 (e.g. 91 for November), Y is the last digit of the year (4 for 1994), TT is the calibration tray ID, and PP is the position of the sonde in the calibration tray. The sondes in question will therefore have serial numbers coded between 26904TTPP and 22914TTPP. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/1996 | 1430 | 04/01/1996 | 1430 |
Subject: | Bad surface pressure sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Bad surface pressure sounding 04/01/96 14:30 Date Submitted: 4/2/96 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 4/01/96 Time 14:30 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The surface pressure for this sounding was entered by the operator as 1016.1 hPa. The first pressure value reported by the sonde is 988.3 hPa. The surface pressure at 11:29 was 987.6 and at 17:32 was 988.3. It appears that the operator entered the sea-level pressure rather than the station pressure. Note that this will affect the altitude calculation throughout the sounding. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/12/1996 | 0531 | 04/12/1996 | 0531 |
Subject: | Bad surface pressure sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Bad surface pressure sounding 04/12/96 05:31 Date Submitted: 4/15/96 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 4/12/96 Time 05:31 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The surface pressure for this sounding was entered by the operator as 996.1 hPa. The first pressure value reported by the sonde is 964.2 hPa. The surface pressure at 11:30 was 972.0 and at 14:30 was 973.5. It appears that the operator entered the sea-level pressure rather than the station pressure. The SMOS pressure during the period is in the 960-970 range. Note that this will affect the altitude calculation throughout the sounding. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/06/1996 | 0529 | 05/06/1996 | 0529 |
Subject: | Bad surface pressure sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Bad surface pressure sounding 05/04/96 05:29 Date Submitted: 5/06/96 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 5/06/96 Time 05:29 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The surface pressure for this sounding was entered by the operator as 993.3 hPa. The first pressure value reported by the sonde is 964.0 hPa. The surface pressure at 08:30 was 964.7 and at 11:31 was 954.3. It appears that the operator entered the sea-level pressure rather than the station pressure. The SMOS pressure during the period is in the 960-950 range. Note that this will affect the altitude calculation throughout the sounding. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/29/1996 | 2031 | 05/29/1996 | 2031 |
Subject: | bad surface pressure sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Bad surface pressure sounding 05/29/96 20:31 Date Submitted: 6/2/96 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 05/29/96 Time 20:31 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The surface pressure for this sounding was entered by the operator as 999.2 hPa. The first pressure value reported by the sonde is 978.2 hPa. The surface pressure at 17:25 was 980.1 and at 05:30 (5/30) was 981.8. It appears that the operator entered the sea-level pressure rather than the station pressure. Note that this will affect the altitude calculation throughout the sounding. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/10/1996 | 1730 | 06/10/1996 | 1730 |
Subject: | bad surface values sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Bad surface values sounding 06/10/96 17:30 Date Submitted: 6/11/96 Submitted By: Barry Lesht _X_ Instrument Mentor David Glahn ___ EST Member ___ Science Team Member _X_ Other _Site Ops__________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 06/10/96 Time 17:30 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The site operator inadvertently entered incorrect surface met values for the subject sounding. Although he caught the error soon after launch and reported it immediately, it was too late to correct. The following table shows the incorrect (present in the file) and correct values. Incorrect Correct Pressure 1000.0 973.9 Temperature 35.0 30.5 Relative Humidity 27 30 The incorrect values of surface temperature and relative humidity will not affect the other values in the sounding. The incorrect surface pressure will, however, affect the altitude calculation throughout the sounding. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/1996 | 1130 | 07/01/1996 | 1130 |
Subject: | Bad surface pressure sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Bad surface pressure sounding 06/21/96 11:30 Date Submitted: 7/1/96 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 07/01/96 Time 11:30 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The surface pressure for this sounding was entered by the operator as 996.4 hPa. The first pressure value reported by the sonde is 972.3 hPa. The surface pressure at 05:30 was 972.3 and at 14:46 was 976.1. It appears that the operator entered the sea-level pressure rather than the station pressure. Note that this will affect the altitude calculation throughout the sounding. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
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Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/04/1996 | 1728 | 07/04/1996 | 1728 |
Subject: | Bad surface pressure sounding |
DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | DQR No: Platform: sgpsondeC1 Subject: Bad surface pressure sounding 07/04/96 17:28 Date Submitted: 7/6/96 Submitted By: _X_ Instrument Mentor ___ EST Member ___ Science Team Member ___ Other _____________________________ For questions or problems, please contact the ARM Experiment Center at 509-375-6898 or via email at dqr@arm.gov. Platform/Measurement: sgpsondewrpnC1/all What level data: (raw,a0,a1,b1,c1 etc): What location was the data collected at: CF Period of time in question Begin Date 07/04/96 Time 17:28 (GMT) End Date Time (GMT) Data should be labeled: ___ questionable ___ All data fields affected _X_ incorrect _X_ Only some data fields affected ___ wrong calibration ___ others Discussion of Problem: The surface pressure for this sounding was entered by the operator as 995.4 hPa. The first pressure value reported by the sonde is 970.1 hPa. The surface pressure at 14:30 was 972.3 and at 20:27 was 971.1. It appears that the operator entered the sea-level pressure rather than the station pressure. Note that this will affect the altitude calculation throughout the sounding. Other observations/measurements impacted by this problem: None Suggested Corrections of the Problem: (e.g. change calibration factor and recompute, flag data with this comment, etc.) Flag data. Data Processing Notes Date |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
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:
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