| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D970407.2 | Incorrect surface temperature | sgpsondewrpnB4.a1 |
| D970409.3 | Reprocess: Jump in pressure value | sgpsondewrpnB6.a1 |
| D970410.5 | Reprocess: Jump in pressure value | sgpsondewrpnB5.a1 |
| D970410.6 | Reprocess: Incorrect surface wind speed | sgpsondewrpnB4.a1 |
| D970422.1 | Jump in pressure value | sgpsondewrpnB6.a1 |
| D970424.3 | Jump in pressure value | sgpsondewrpnB4.a1 |
| D970430.1 | Jump in pressure value | sgpsondewrpnB6.a1 |
| D970623.1 | Jump in pressure value B4 sounding | sgpsondewrpnB4.a1 |
| D970624.3 | Jump in pressure value B6 sounding | sgpsondewrpnB6.a1 |
| D970624.4 | Jump in pressure value B6 | sgpsondewrpnB6.a1 |
| D970709.1 | Bad pressure values CF sounding 970704:0525 | sgpsondewrpnC1.a1 |
| D970714.1 | Last sample incorrect b6 sounding 970712:1130 | sgpsondewrpnB6.a0, sgpsondewrpnB6.a1 |
| D970714.2 | qc flags set incorrectly at 11:52:44 | sgpsondewrpnB6.a1 |
| D970717.1 | possible telemetry interference/interpolated data | sgpsondewrpnB5.a1 |
| D970717.2 | Pressure jump at launch | sgpsondewrpnB5.a1 |
| D970718.1 | Missing/Questionable data 970715:0530 sounding | sgpsondewrpnB6.a1 |
| D970721.1 | Pressure jump after launch | sgpsondewrpnB6.a1 |
| D970921.1 | Pressure jump at launch | sgpsondewrpnB6.a1 |
| D970921.2 | Pressure jump at launch | sgpsondewrpnB6.a1 |
| D970921.3 | Pressure jump at launch | sgpsondewrpnB4.a1 |
| D970923.1 | Pressure jump at launch | sgpsondewrpnB5.a1 |
| D970923.2 | Pressure jump at launch | sgpsondewrpnC1.a1 |
| D970930.1 | Pressure jump at launch | sgpsondewrpnB1.a1 |
| D970930.2 | Pressure jump at launch | sgpsondewrpnB6.a1 |
| D971002.1 | Pressure jump at launch | sgpsondewrpnB6.a1 |
| D971006.2 | Pressure jump after launch | sgpsondewrpnB6.a1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/03/1997 | 2332 | 04/03/1997 | 2332 |
| Subject: | Incorrect surface temperature |
| DataStreams: | sgpsondewrpnB4.a1 |
| Description: | DQR No: Platform: sgpsondeB4
Subject: Incorrect surface pressure: sounding B4 04/03/97:2332
Date Submitted: 4/07/97
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: sgpsondewrpnB4/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: B4
Period of time in question
Begin Date 04/03/97 Time 23:32 (GMT)
End Date Time (GMT)
Data should be labeled:
____ questionable ___ All data fields affected
_X__ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
It appears that the site operator made a keyboard mistake when entering the
surface temperature for the subject sounding. The temperature was entered
as 26.0 degC and the first temperature value reported by the radiosonde was
14.3 degC. The operators' meteorological observation log shows that the
surface temperature was 14.2 degC at 2300.
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: | sgpsondewrpnB4.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/04/1997 | 1733 | 04/04/1997 | 1733 |
| Subject: | Reprocess: Jump in pressure value |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | DQR No: Platform: sgpsondeB6
Subject: Jump in pressure value B6 sounding 970404.1733
Date Submitted: 4/9/97
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: sgpsondewrpnb6/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/BF6
Period of time in question
Begin Date 4/04/97 Time 17:33 (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
879.2. The surface pressure value was 962.1 hPa. Either the pressure
sensor was jarred during launch or the system mis-identified the actual
launch start time. Further clarification requires analysis of the raw
data which will take some time. The altitude values for this sounding
will be incorrect. The ascent rate values during the first 30 seconds
also will be wrong. Because the system will reject samples with out
of bound ascent rates (i.e., during the first 30 seconds), the temperature
and rh values also will be incorrect (result of interpolation). Relative
height values after 30 seconds should be okay.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/05/1997 | 2030 | 04/05/1997 | 2030 |
| Subject: | Reprocess: Jump in pressure value |
| DataStreams: | sgpsondewrpnB5.a1 |
| Description: | DQR No: Platform: sgpsondeB5
Subject: Jump in pressure value B5 sounding 970405.2030
Date Submitted: 4/10/97
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnb5/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/BF5
Period of time in question
Begin Date 4/5/97 Time 20:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The first pressure value reported by the radiosonde (t = 2 sec) is
967.3. The surface pressure value was 973.5 hPa. This difference
is slightly greater than the expected (normal) change and may mean that
either the pressure sensor was jarred during launch or the system
mis-identified the actual launch start time. Further clarification requires
analysis of the raw data which will take some time. The altitude values
for this sounding will be incorrect. The ascent rate values during the
first 30 seconds also will be wrong. Because the system will reject
samples with out of bound ascent rates (i.e., during the first 30 seconds),
the temperature and rh values also will be incorrect (result of
interpolation). Relative height values after 30 seconds should be okay.
Other observations/measurements impacted by this problem:
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnB5.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/03/1997 | 2030 | 04/03/1997 | 2030 |
| Subject: | Reprocess: Incorrect surface wind speed |
| DataStreams: | sgpsondewrpnB4.a1 |
| Description: | DQR No: Platform: sgpsondeB4
Subject: Incorrect surface wind speed B4 970403:2030
Date Submitted: 4/10/97
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnb4
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/BF4
Period of time in question
Begin Date 4/03/97 Time 20:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface wind speed was entered by the operator as 103 m/s. This is
clearly a typo and was flagged by the automatic QC check. The surface
speed at 2000 was 0.9 and at 2100 was 0.0. It is likely the operator
intended to enter either 1.3 or 0.3 m/s.
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: | sgpsondewrpnB4.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/18/1997 | 1731 | 04/18/1997 | 1731 |
| Subject: | Jump in pressure value |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | DQR No: Platform: sgpsondeB6
Subject: Jump in pressure value B6 sounding 970418.1731
Date Submitted: 4/22/97
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: sgpsondewrpnb6/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/BF6
Period of time in question
Begin Date 4/18/97 Time 17:31 (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
913.4. The surface pressure value was 973.9 hPa. This difference
is substantially 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: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/20/1997 | 2030 | 04/20/1997 | 2030 |
| Subject: | Jump in pressure value |
| DataStreams: | sgpsondewrpnB4.a1 |
| Description: | DQR No: Platform: sgpsondeB4
Subject: Jump in pressure value B4 sounding 970420.2030
Date Submitted: 4/24/97
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: sgpsondewrpnb4/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/BF4
Period of time in question
Begin Date 4/20/97 Time 20:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The first pressure value reported by the radiosonde (t = 2 sec) is
925.7. The surface pressure value was 933.7 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: | sgpsondewrpnB4.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/12/1997 | 0832 | 04/12/1997 | 0832 |
| Subject: | Jump in pressure value |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | DQR No: Platform: sgpsondeB6
Subject: Jump in pressure value B6 sounding 970412.0832
Date Submitted: 4/30/97
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: sgpsondewrpnb6/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/BF6
Period of time in question
Begin Date 4/12/97 Time 08:32 (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:
This is a sounding that was just reprocessed because the original data
was not sent to the SDS due to a communication problem.
The first pressure value reported by the radiosonde (t = 2 sec) is
904.3. The surface pressure value was 978.9 hPa. This difference
is substantially 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: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/16/1997 | 1730 | 06/16/1997 | 1730 |
| Subject: | Jump in pressure value B4 sounding |
| DataStreams: | sgpsondewrpnB4.a1 |
| Description: | DQR No: Platform: sgpsondeB4
Subject: Jump in pressure value B4 sounding 970616:1730
Date Submitted: 6/22/97
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: sgpsondewrpnb4/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/BF4
Period of time in question
Begin Date 6/16/97 Time 17:30 (GMT)
End Date Time (GMT)
Data should be labeled:
_X_ questionable _X_ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The first pressure value reported by the radiosonde (t = 2 sec) is
931.4. The surface pressure value was 936.9 hPa. This difference
is slightly greater than the expected (normal) change and may mean that
either the pressure sensor was jarred during launch or the system
mis-identified the actual launch start time. Further clarification requires
analysis of the raw data which will take some time. The altitude values
for this sounding may 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: | sgpsondewrpnB4.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/19/1997 | 0530 | 06/19/1997 | 0530 |
| Subject: | Jump in pressure value B6 sounding |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | DQR No: Platform: sgpsondeB6
Subject: Jump in pressure value B6 sounding 970619:0530
Date Submitted: 6/24/97
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: sgpsondewrpnb6/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/BF6
Period of time in question
Begin Date 6/19/97 Time 05:30 (GMT)
End Date Time (GMT)
Data should be labeled:
_X_ questionable ___ All data fields affected
___ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The first pressure value reported by the radiosonde (t = 2 sec) is
970.4. The surface pressure value was 975.1 hPa. This difference
is 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 may 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: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 06/19/1997 | 1130 | 06/19/1997 | 1130 |
| Subject: | Jump in pressure value B6 |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | DQR No: Platform: sgpsondeB6
Subject: Jump in pressure value B6 sounding 970619:1130
Date Submitted: 6/24/97
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: sgpsondewrpnb6/ (alt, asc, press)
What level data: (raw,a0,a1,b1,c1 etc): all
What location was the data collected at: SGP/BF6
Period of time in question
Begin Date 6/19/97 Time 11:30 (GMT)
End Date Time (GMT)
Data should be labeled:
_X_ questionable ___ All data fields affected
___ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The first pressure value reported by the radiosonde (t = 2 sec) is
968.0. The surface pressure value was 974.5 hPa. This difference
is 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 may 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: | sgpsondewrpnB6.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 |
|---|---|---|---|
| 07/12/1997 | 1314 | 07/12/1997 | 1314 |
| Subject: | Last sample incorrect b6 sounding 970712:1130 |
| DataStreams: | sgpsondewrpnB6.a0, sgpsondewrpnB6.a1 |
| Description: | It appears that a communications glitch resulted in the last sample line of the raw data provided by the instrument being corrupted. As a result, the ingest translated the corrupted data as real information. The last valid sample is the one collected at 104 min 48 seconds into the sounding. Because this was the last sample in the file, I do not recommend that we reprocess these data. |
| Measurements: | sgpsondewrpnB6.a0:
sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/12/1997 | 1152 | 07/12/1997 | 1152 |
| Subject: | qc flags set incorrectly at 11:52:44 |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | This should be an 'inverse' data quality report. Because of the problem with the ingest of this file caused by the communication glitch (see earlier DQR and PIF submitted today) the qc_delta flags for variabels tdry and asc were set incorrectly. All data for this sounding from 11:30 to one sample from the end are correct and the only qc flags that should be set are at the first and last samples of the file. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/15/1997 | 1836 | 07/15/1997 | 1851 |
| Subject: | possible telemetry interference/interpolated data |
| DataStreams: | sgpsondewrpnB5.a1 |
| Description: | It appears that this sonde lost signal briefly a little after an hour into the flight at 18:36:42 (altitude approx 17 km. Signal was recovered, but it is possible that the signal was from a different sonde - temp and RH data appear to be interpolated in the interval from 17 to 20 km. I would treat all data above 17 km (after 18:36:42) as questionable. |
| Measurements: | sgpsondewrpnB5.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/15/1997 | 2030 | 07/15/1997 | 2030 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB5.a1 |
| Description: | The first pressure value returned by the radiosonde after launch (985.2) is somewhat lower than would be expected based on the entered surface pressure (990.0). It is likely that either the pressure sensor was jarred at launch or that the system mis-identified the launch time. Altitude and absolute pressure values will be affected and ascent rate values during the first 30 sec of flight will be incorrect. |
| Measurements: | sgpsondewrpnB5.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/15/1997 | 0604 | 07/15/1997 | 0705 |
| Subject: | Missing/Questionable data 970715:0530 sounding |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | DATA QUALITY REPORT(DQR)
DQR No: D970718.1
o Date Submitted: Fri Jul 18 16:29:46 GMT 1997
o Submitted By: Barry Lesht
Organization: ANL
Telephone: (630) 252-4208
Email: bmlesht@anl.gov
o Subject of DQR: sgpsondewrpnB6.9707150604.9707150705.all - Missing/Questionable data
970715:0530 sounding
o Data should be labeled: questionable, missing
o Description:
This file has two problems. The first is possible interference and
incorrect data from 34:32 into the flight (06:04:32 or 9673 m) to
38:48 (06:08:48 or 10718 m). I would treat these data a questionable.
There is a gap in the data, possibly due to SDS communication problems
from 38:48 to 95:42 (07:05:42 or 25112 m) in which all data are missing.
o Suggested Corrections:
Reprocess file from raw data (companion PIF will be submitted).
Flag data. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/17/1997 | 2340 | 07/17/1997 | 2340 |
| Subject: | Pressure jump after launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | First pressure value returned by the sonde after launch was 966.8, somewhat lower than would be expected given the surface pressure reading of 971.3. This resulted in an apparent ascent rate that is greater than the QC flag trigger. Ascent rates during the first 30 s of flight are likely incorrect. Absolute altitudes also are likely incorrect. Relative pressure differences after launch should be okay. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/16/1997 | 1728 | 09/16/1997 | 1728 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | The first pressure value reported by the sonde after launch (966.1) is lower than the surface pressure value (972.1) by a greater difference than normally would be expected. This may indicate that the sonde was jarred on launch, that the system mis-identified actual launch time, or that the operator entered and incorrect value (typo or read too early). The altitude values for this sounding will be wrong as will the ascent rates during the first 30 seconds. If the ascent rates were such that the sample acceptance criteria were violated, the pressure, temperature, and RH values in the first part of the profile may be the result of interpolation. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/17/1997 | 0530 | 09/17/1997 | 0530 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | The difference between the first pressure value reported by the sonde (958.8) and the surface pressure (969.3) is considerable greater than would be expected. The altitude values for this sounding will be incorrect, as will be the ascent rate values during the first 30 seconds. Values of P, T, and RH during the first 30 seconds will most likely be values interpolated betwen the surface and the 30 second sample. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/17/1997 | 2030 | 09/17/1997 | 2030 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB4.a1 |
| Description: | The difference between the first pressure reported by the sonde after launch (930.0) and that reported at the surface (935.7) is larger than would be expected. The altitude values for this sounding will be incorrect, as will be the ascent rates for the first 30 seconds. Some of the P, T, and RH samples (most likely those nearest the ground) will be interpolated values. |
| Measurements: | sgpsondewrpnB4.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/21/1997 | 1430 | 09/21/1997 | 1430 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB5.a1 |
| Description: | The difference between the first pressure value reported by the sonde after launch (992.7) and the surface value entered by the operator (997.5) is somewhat greater than would normally be expected. This may indicate jarring of the pressure sensor at launch or misidentification of the start time by the system. The altitude values in the file will be incorrect as well be the ascent rate values during the first 30 seconds of the sounding. |
| Measurements: | sgpsondewrpnB5.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/21/1997 | 0530 | 09/21/1997 | 0530 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | The difference between the first pressure value recorded by the radiosonde after launch (984.5) that the surface value entered by the operator (989.3) is somewhat larger than would normally be expected. This will result in incorrect altitude values throughout the sounding. The ascent rates during the first 30 seconds also will be incorrect. |
| Measurements: | sgpsondewrpnC1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/27/1997 | 0530 | 09/27/1997 | 0530 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB1.a1 |
| Description: | The difference between first pressure value reported by the radiosonde after launch (954.4) and the surface value entered by the operator (961.7) is greater than expected , indicating that either ths sonde was jarred on launch or that the system mis-identified start time. |
| Measurements: | sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/27/1997 | 2030 | 09/27/1997 | 2030 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | The difference between the first pressure value reported by the radiosonde aloft (957.9) and the surface value entered by the operator (962.6) is greater than would be expected normally. This may indicate that the sonde was jarred at launch or that the system mis-identified the launch start time. The altitude values for this sounding will be incorrect as will be the ascent rates in the first 30 seconds. If the reported ascent rates exceed 12 m/s, the thermodynamic data will be interpolated rather than sampled. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/29/1997 | 2030 | 09/29/1997 | 2030 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | The difference between the first pressure value reported by the sonde after launch (968.5) and the surface value entered by the opertor (973.5) is greater than would normally be expected. This may indicate that either the sonde was jarred at launch or that the system mis-identified launch start time. The altitude values for this sounding will be in error and the ascent rate values in the first 30 seconds also will be wrong. |
| Measurements: | sgpsondewrpnB6.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/29/1997 | 2030 | 09/29/1997 | 2030 |
| Subject: | Pressure jump after launch |
| DataStreams: | sgpsondewrpnB6.a1 |
| Description: | The difference between the first pressure value reported by the sonde after launch (968.5) and the surface value entered by the operator (973.8) is greater than would normally be expected. The altitude values for this sounding will be incorrect as will be the ascent rates for the first 30 seconds. Some of the thermodynamic data at the beginning of the soundings (when ascent rates exceed 12 m/s) will be the result of interpolation between the surface value and the first value obtained when the ascent rate with in acceptable limits. |
| Measurements: | sgpsondewrpnB6.a1:
|