| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D000319.1 | SGP/SONDE - Data missing from sounding | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D950722.1 | Reprocess: Sounding done in research mode | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D950722.2 | Reprocess: Sounding done in research mode | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D950723.1 | Reprocess: Sounding done in research mode | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D950815.4 | SGP/SONDE/B1 - Reprocess: sonde RESEARCH mode altitudes biased low | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D960221.1 | signal interruption | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D960229.3 | SGP/SONDE/B1 - incorrect factory RH calib-radiosondes | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D960807.1 | Questionable surface pressure sounding | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D960809.1 | Questionable surface pressure sounding | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D970930.1 | Pressure jump at launch | sgpsondewrpnB1.a1 |
| D980126.1 | Incorrect radiosonde serial numbers | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D980126.10 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.11 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.3 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.4 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.5 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.6 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.7 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.8 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980126.9 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980127.3 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980128.2 | Incorrect surface temperature and humidity | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D980517.1 | Pressure jump at launch | sgpsondewrpnB1.a1 |
| D990124.2 | SGP/SONDE - Dry bias in sonde RH | DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, sgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0, sgpsondeB4.a1, sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00, sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondeptuC1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0, sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1, sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00, sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0, sgpsondewrprB4.a1, sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00, sgpsondewrprC1.a0, sgpsondewrprC1.a1 |
| D990201.1 | SGP/SONDE - Incorrect surface pressure | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| D990304.1 | SGP/SONDE - Pressure jump at launch/incorrect surface values | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/16/2000 | 2042 | 03/16/2000 | 2143 |
| Subject: | SGP/SONDE - Data missing from sounding |
| DataStreams: | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | It appears that the collection of the raw data file was interupted by the SDS. The following message appears in the raw file (sonde-hills10003161901.rawraw): 12 0 4.8 4384 589.3 -11.0 87 -12.7 274 12.8 110001110110 #Collection process shut down by SIGTERM Another raw file (sonde-hills10003162145.raw) follows with: ~LL? 73 30 4.7 22154 37.9 -63.4 1 -93.3 250 13.2 110001110110 I don't understand the cause of this problem, but am confident that it is not instrument related. These files were merged on ingest. |
| Measurements: | sgpsondewrpnB1.00:
sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/17/1995 | 2330 | 07/17/1995 | 2330 |
| Subject: | Reprocess: Sounding done in research mode |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR No: Platform:
Subject: B1 Sounding 950717:2330 Done in Research Mode
Date Submitted: 7/22/95
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: SGPSONDEB1
What level data: (raw,a0,a1,b1,c1 etc): ALL
What location was the data collected at: SGP/B1 (Hillsboro)
Period of time in question
Begin Date 7/17/95 Time 23:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
_X_ others
Discussion of Problem: This sounding was done in RESEARCH mode for
both thermodynamic as well as wind data. The
normal mode is to for RESEARCH winds only. As
a result, both the ascending and descending
flights of the sonde are included in the data
file and none of the data are smoothed or
filtered.
Other observations/measurements impacted by this problem: I think that
some of the radiation codes that use the sonde
data as input don't handle the descending samples
well. I'm not sure which ones may be affected.
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.) Users should be notified and,
if (and only if) requested, the sounding could be reprocessed either using
the software developed at the EC or the digi-CORA.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/18/1995 | 0530 | 07/18/1995 | 0530 |
| Subject: | Reprocess: Sounding done in research mode |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR No: Platform:
Subject: B1 Sounding 950718:0530 Done in Research Mode
Date Submitted: 7/22/95
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: SGPSONDEB1
What level data: (raw,a0,a1,b1,c1 etc): ALL
What location was the data collected at: SGP/B1 (Hillsboro)
Period of time in question
Begin Date 7/18/95 Time 05:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
_X_ others
Discussion of Problem: This sounding was done in RESEARCH mode for
both thermodynamic as well as wind data. The
normal mode is to for RESEARCH winds only. As
a result, both the ascending and descending
flights of the sonde are included in the data
file and none of the data are smoothed or
filtered.
Other observations/measurements impacted by this problem: I think that
some of the radiation codes that use the sonde
data as input don't handle the descending samples
well. I'm not sure which ones may be affected.
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.) Users should be notified and,
if (and only if) requested, the sounding could be reprocessed either using
the software developed at the EC or the digi-CORA.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/18/1995 | 2330 | 07/18/1995 | 2330 |
| Subject: | Reprocess: Sounding done in research mode |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR No: Platform:
Subject: B1 Sounding 950718:2330 Done in Research Mode
Date Submitted: 7/23/95
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: SGPSONDEB1
What level data: (raw,a0,a1,b1,c1 etc): ALL
What location was the data collected at: SGP/B1 (Hillsboro)
Period of time in question
Begin Date 7/18/95 Time 23:30 (GMT)
End Date Time (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
___ incorrect ___ Only some data fields affected
___ wrong calibration
_X_ others
Discussion of Problem: This sounding was done in RESEARCH mode for
both thermodynamic as well as wind data. The
normal mode is to for RESEARCH winds only. As
a result, both the ascending and descending
flights of the sonde are included in the data
file and none of the data are smoothed or
filtered.
Other observations/measurements impacted by this problem: I think that
some of the radiation codes that use the sonde
data as input don't handle the descending samples
well. I'm not sure which ones may be affected.
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.) Users should be notified and,
if (and only if) requested, the sounding could be reprocessed either using
the software developed at the EC or the digi-CORA.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/20/1994 | 2330 | 05/21/1994 | 2359 |
| Subject: | SGP/SONDE/B1 - Reprocess: sonde RESEARCH mode altitudes biased low |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR DESCRIPTION:
DQR No: Platform: BBSS
Subject: Sonde RESEARCH mode altitudes biased low
Date Submitted: 8/15/95
Submitted By: Barry Lesht _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement:
What level data: (raw,a0,a1,b1,c1 etc): All
What location was the data collected at: CF, all BFs
Period of time in question
Begin Date 4/ 7/94 Time : (GMT)
End Date / / Time : (GMT)
Data should be labeled:
___ questionable ___ All data fields affected
_X_ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem: I have discovered a problem with the RESEARCH mode
(for PTU) Vaisala processing that results in a negative bias in the calculation
of sonde altitude. This bias results from neglecting the sensed relative
humidity when calculating air density when integrating the hydrostatic
equation. In essence, the Vaisala RESEARCH mode (PTU) processing assumes
a dry atmosphere when calculating sonde altitude. The magnitude of the bias
is cumulative with height and will depend on the vertical distribution of
moisture, but I have found that it can be as much as 20 meters at the
tropopause (the RESEARCH-mode sounding altitudes will be smaller than
altitudes calculated by using sensed RH). This problem applies to all
soundings done in "WXPR" mode, where X is either R or N. In particular,
all soundings done during the April 1994 (RCS) IOP (4/7/94 to 5/21/94)
are affected as well as those occasional inadvertent WXPR soundings.
Note that the only variable affected is "alt."
In response to my queries, Vaisala explained that the dry-air calculation was
selected to increase the processing speed in RESEARCH mode. They consider
the problem to be a minor one. Vaisala claims that altitudes in NORMAL
(or NOMINAL) processing are calculated by including the sensed RH. My
simulation experiments have not yet progressed to the point where I can
confirm this independently.
Other observations/measurements impacted by this problem: Unknown.
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Users of the data should be informed of the problem. I have developed software
that will reproduce the standard output stream with correct altitudes from
the raw binary data and can provide it to interested users. Boundary facility
soundings can also be reprocessed through the digi-CORA systems if need be.
Data Processing Notes Date |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/01/1996 | 1745 | 02/01/1996 | 1746 |
| Subject: | signal interruption |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR No: Platform: sgpsondeB1
Subject: Signal Interuption BF1 Sounding 02/01/96:1730
Date Submitted: 2/20/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnB1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: Morris - CF
Period of time in question
Begin Date 02/01/96 Time 17:45:50 (GMT)
End Date 02/01/96 Time 17:46:56 (GMT)
Data should be labeled:
___ questionable _X_ All data fields affected
_X_ incorrect ___ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The normal data in this sounding were interupted mid-flight, possibly as
a result of interference from another sonde. Because this interuption did
not cause 'missing' data but rather incorrect data to be inserted into the
output file, the normal qc flags WERE triggered and users who normally check
the flags should have no trouble. Other users should be alerted.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date
----- End Included Message ----- |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 02/21/1995 | 1730 | 09/29/1995 | 0830 |
| Subject: | SGP/SONDE/B1 - incorrect factory RH calib-radiosondes |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | Ongoing investigation of differences between preciptiable water vapor
measured by the microwave radiometer and precipitable water vapor estimated
by integrating the radiosonde-measured profile of water vapor density, along
with isolated periods of anomalous behavior in the AERI/LBLRTM QME results
led to the suggestion that the calibration of some radiosondes may be suspect.
One group of radiosondes, calibrated in November 1994, seemed particularly
irregular. I met with the manufacturer on February 7 to show them my
results and discuss this issue with them. The manufacturer agreed that
the data were suggestive of a calibration problem and offered to review
their calibration records for the period in question.
The initial results of the manufacture's investigation were sent to me
on February 27. The manufacturer found that radiosondes assembled
between 10/26/94 and 11/22/94 were incorrectly calibrated. The incorrect
calibration affected only the relative humidity measurement; the nature
of the calibration error is non-linear, with the radiosondes meeting
the specified +/- 2% RH accuracy at both 20%RH (+45 degC) and 0%RH (room
temperature). The error in calibration occurs at high RH and low temperature
(approximate saturation at -30 degC) and can be as large as 10%RH with
the radiosonde reading high. The direction of this error agrees with
the observation of negative integrated residuals in the AERI ch 1 region
made by Tony Clough and the tendency toward greater than 'normal' differences
in PWV when compared to the MWR when these sondes were used.
The cause of the calibration error was the addition of new, high RH,
quality control check (-30 degC) into the manufacturing stream that
required a change in the calibration software. The new software mistakenly
loaded an incorrect parameter file that caused the calibration to be
off at high RH - this was not noticed at the time because the radiosondes
passed the regular production QC checks and the failure to agree at the
new QC value was thought to result from a problem with the new reference
standard. Troubleshooting the entire calibration system in an effort
to incorporate the new QC check was conducted along with normal production,
and took about a month to complete. The troubleshooting including adjustment
of the calibration software, at which time the correct parameter file
happened to be reloaded, and after which the radiosondes met the desired
specification at the high RH value.
According to the manufacturer, approximately 1900 radiosondes were calibrated
during the period in question. Sondes from this period were used at all
CART facilities. At least 1178 soundings involving these sondes were
included in the QME results I looked at (some QME results were discarded
because of problems with either the MWR data or the sounding data). The
distribution of these 1178 by facility is:
Facility Number of Sondes First Used Last Used
(based on QME)
CF 316 1/20/95 (11:30) 9/22/95 (11:30)
B1 143 2/21/95 (17:30) 9/29/95 ( 8:30)
B4 313 4/ 6/95 (17:30) 11/ 7/95 (17:28)
B5 153 4/14/95 (17:30) 12/14/95 (17:30)
B6 253 3/22/95 (17:30) 10/19/95 (17:30)
The sondes can be recognized by decoding the serial_number metadata word
in the sounding netCDF file. The serial number of the sondes in question
is a number (8 or 9 digit) of the form DDMMYTTPP where DD is the day of
the month (leading zero missing in the netCDF data), MM is the month +80
(e.g. 91 for November), Y is the last digit of the year (4 for 1994),
TT is the calibration tray ID, and PP is the position of the sonde in
the calibration tray. The sondes in question will therefore have serial
numbers coded between 26904TTPP and 22914TTPP. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/05/1996 | 0530 | 08/05/1996 | 0530 |
| Subject: | Questionable surface pressure sounding |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | Subject: DQR B1 sounding 960805:0530
Content-Length: 1852
DQR No: Platform: sgpsondeB1
Subject: Questionable surface pressure sounding BF1 08/05/96:0530
Date Submitted: 8/5/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnB1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: BF1 Hillsboro
Period of time in question
Begin Date 08/05/96 Time 05:30 (GMT)
End Date Time (GMT)
Data should be labeled:
_X_ questionable ___ All data fields affected
___ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 967.1
hPa. The first pressure value reported by the sonde is 954.4 hPa. The surface
pressure at 02:30 was 950.3 but at 23:30 (8/4) it was 962.5 (sonde 960.7).
It appears that the either the operator mistakenly entered the 967.1 rather
than 957.1 and/or that the pressure sensor may have jumped after launch.
In any event, the difference between the surface sample and the first sonde
sample exceeds our criterion for flagging.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data.
Data Processing Notes Date
----- End Included Message ----- |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/06/1996 | 1730 | 08/06/1996 | 1730 |
| Subject: | Questionable surface pressure sounding |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | DQR No: Platform: sgpsondeB1
Subject: Questionable surface pressure sounding BF1 08/06/96:17:30
Date Submitted: 8/9/96
Submitted By: _X_ Instrument Mentor
___ EST Member
___ Science Team Member
___ Other _____________________________
For questions or problems, please contact the ARM Experiment Center at
509-375-6898 or via email at dqr@arm.gov.
Platform/Measurement: sgpsondewrpnB1/all
What level data: (raw,a0,a1,b1,c1 etc):
What location was the data collected at: BF1 Hillsboro
Period of time in question
Begin Date 08/06/96 Time 17:30 (GMT)
End Date Time (GMT)
Data should be labeled:
_X_ questionable ___ All data fields affected
___ incorrect _X_ Only some data fields affected
___ wrong calibration
___ others
Discussion of Problem:
The surface pressure for this sounding was entered by the operator as 967.8
hPa. The first pressure value reported by the sonde is 956.5 hPa. I cannot
tell if the operator entered the surface pressure incorrectly or if the
sonde pressure sensor jumped after launch. In any event, the difference
between the surface sample and the first sonde sample exceeds our
criterion for flagging.
Note that this will affect the altitude calculation throughout the sounding.
Other observations/measurements impacted by this problem:
None
Suggested Corrections of the Problem: (e.g. change calibration factor and
recompute, flag data with this comment, etc.)
Flag data. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/27/1997 | 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 |
|---|---|---|---|
| 01/01/1998 | 0000 | 12/31/1999 | 2359 |
| Subject: | Incorrect radiosonde serial numbers |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | Radiosondes manufactured at Vaisala's Woburn, MA factory during the first of January 1998 have incorrect serial numbers. Instead of being numbered 8012XXXXX these sondes are numbered 7012XXXXX. Vaisala has been informed of this, has confirmed the problem, and has corrected their numbering for all subsequent sondes. 163 incorrectly numbered sondes were shipped to ARM on 1/9/98. Some have been used at the CF since 1/19/98:1430. |
| Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnB5.a1:
sgpsondewrpnB4.a0:
sgpsondewrpnB1.a0:
sgpsondewrpnB6.a0:
sgpsondewrpnB5.a0:
sgpsondewrpnB4.a1:
sgpsondewrpnB6.a1:
sgpsondewrpnC1.a1:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/23/1998 | 0830 | 01/23/1998 | 0830 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered inside temperature (24.1 degC) and RH (15) instead of outside (approx -5.6 degC, 89RH). This will affect the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/23/1998 | 1130 | 01/23/1998 | 1130 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered inside temperature (24.4 degC) and relative humidity (15) instead of outside (approx -4.0 degC, 82). This will affect the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/20/1998 | 0229 | 01/20/1998 | 0229 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | Incorrect values of surface temperature and relative humidity were entered by the operator. These were entered as 25.3 degC and 20% and should probably have been closer to -0.5 degC and 73%. It appears that the operator used the inside readings rather than the outside readings. This seems to be a recurring problem (similar DQRs follow) and site ops has been informed so procedures can be reviewed. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/20/1998 | 0530 | 01/20/1998 | 0530 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | Incorrect values of surface temperature and relative humidity were entered by the operator. These were entered as 22.1 degC and 20, but should probably be closer to -1.1 degC and 79%. It appears that the operator used the inside rather than the outside temperature. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/20/1998 | 2330 | 01/20/1998 | 2330 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered incorrect values of surface temperature and relative humidity. The values entered are 18.8 degC and 30rather should be closer to 10.0 degC and 55It appears that the operator entered the inside rather than the outside values. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/21/1998 | 0230 | 01/21/1998 | 0230 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered values of temperature and relative humidity obtained inside (21.3 degC, 23) rather than outside (closer to -0.4 degC, 79). These incorrect values will affect only the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/21/1998 | 0530 | 01/21/1998 | 0530 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered temperature and relative humidity values obtained from inside (21.8 degC, 20) rather than outside (closer to -1.8 degC, 78). The incorrect values will only affect the first few points in the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/22/1998 | 0830 | 01/22/1998 | 0830 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator apparently entered inside temperature and relative humidity (24.4, 21) rather than outside values (closer to -6.0, 81). The incorrect values will affect only the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/22/1998 | 1130 | 01/22/1998 | 1130 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered surface temperature and relative humidity (21.0, 18) obtained from inside rather than from outside (closer to -6.5, 75). This will affect the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/25/1998 | 1430 | 01/25/1998 | 1430 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | It appears that the operator incorrectly entered inside temperature (21.1 degC) and RH (23) instead of outside values obtained from the radiosonde (closer to 0.8 degC and 78) as surface values for this sounding. The first few levels of data will be affected. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/26/1998 | 1430 | 01/26/1998 | 1430 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | It appears that the operators entered the inside temperature (18.6 degC) and RH (29) rather than the outside values (approx 0.9 degC, 73) when prompted for the surface met data. These incorrect values will affect the first few points of the sounding. |
| Measurements: | sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/13/1998 | 2330 | 05/13/1998 | 2330 |
| Subject: | Pressure jump at launch |
| DataStreams: | sgpsondewrpnB1.a1 |
| Description: | The difference between the first pressure reported by the sonde after launch (945.1) is substantially lower than that reported at the surface (955.7). This difference is greater than expected and suggests that either the sonde was jarred at launch or the system misidentified the actual start time. The effect is that the absolute altitudes will be incorrect for this sounding as will be the ascent rates during the first 30 seconds. |
| Measurements: | sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 05/27/1992 | 0000 | 05/31/2002 | 2359 |
| Subject: | SGP/SONDE - Dry bias in sonde RH |
| DataStreams: | DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, sgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0, sgpsondeB4.a1, sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00, sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, sgpsondeptuC1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0, sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1, sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00, sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0, sgpsondewrprB4.a1, sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00, sgpsondewrprC1.a0, sgpsondewrprC1.a1 |
| Description: | Vaisala has confirmed ARM findings of an apparent dry bias in the relative humidity measured by RS-80H radiosondes. The cause of the dry bias is thought to be contamination of the humidity sensor by volatile organic substances originating from some plastic parts of the radiosonde. The amount of contamination is a function of the time between the date of sonde manufacture and its use. All RS-80H sondes manufactured before week 34 of 1998 will show this bias. After week 34 of 1998 Vaisala changed its packaging to reduce, but not eliminate the contamination problem. Starting with RS-80 radiosonde manufactured in late June 2000 Vaisala enclosed the sensor boom in an inert plastic shield, thereby eliminating the contamination that caused the dry bias. Starting in May 2001 at the SGP, May 2002 at the TWP, and later 2002 at the NSA, ARM has moved to using RS-90 radiosondes. These sondes are not subject to the contaminatino that caused the dry bias. Vaisala is in the process of developing an algorithm that can be used to estimate the correct RH from knowledge of the sonde age. All of the ARM sounding data have sufficient metadata available to apply the correction. Additionally, ARM has funded a Science Team effort (Milosevich) to develop a 'best' correction algorithm for the RS-80 radiosonde humidity data. When completed this algorithm will allow us to reprocess the accumulated RS-80 data and produce a new data platform with what we hope will be more accurate data. |
| Measurements: | sgpsondeB4.00:
DsgpsondeB5.00:
sgpsondewrpnC1.00:
sgpsondewnpnC1.a1:
DsgpsondeptuB6.00:
DsgpsondenogcptucalcB1.c1:
sgpsondewrpnB6.a0:
DsgpsondeptuC1.00:
sgpsondewnprC1.a0:
DsgpsondenogcptucalcB5.c1:
DsgpsondeptucalcC1.c1:
sgpsondewnpnB4.a1:
sgpsondeB6.00:
sgpsondewrprB4.00:
DsgpsondeptuB1.00:
DsgpsondenogcptucalcC1.c1:
sgpsondewrpnC1.a1:
sgpsondewrpnB1.a1:
sgpsondewrprC1.00:
sgpsondewrpnB1.a0:
sgpsondewrprB5.a1:
sgpsondeB5.a1:
sgpsondewrprB5.00:
DsgpsondeC1.00:
sgpsondewrprB1.a1:
sgpsondeB1.00:
sgpsondeptuC1.00:
DsgpsondenogcptucalcB4.c1:
DsgpsondeB1.a0:
DsgpsondeC1.a1:
DsgpsondeptucalcB5.c1:
sgpsondewrprB1.00:
sgpsondewrpnC1.a0:
sgpsondewrpnB1.00:
sgpsondeB1.a0:
DsgpsondeC1.a0:
DsgpsondeB4.a1:
DsgpsondeptuB4.00:
sgpsondeB1.a1:
sgpsondewrprB5.a0:
sgpsondeC1.00:
sgpsondewnpnB1.a1:
sgpsondewrpnB6.a1:
sgpsondewrprC1.a0:
sgpsondeC1.a0:
sgpsondewrprC1.a1:
DsgpsondeptuB5.00:
sgpsondewrpnB5.a0:
sgpsondewrprB4.a1:
DsgpsondeB1.a1:
sgpsondeB5.a0:
sgpsondewnpnB6.a0:
DsgpsondeB5.a1:
DsgpsondenogcwrpnB1.c1:
sgpsondewrprB1.a0:
sgpsondewrpnB5.00:
DsgpsondeB4.a0:
DsgpsondenogcwrpnB4.c1:
DsgpsondeB5.a0:
sgpsondewnpnB4.a0:
sgpsondewnprC1.a1:
sgpsondewrpnB5.a1:
sgpsondewnpnB5.a0:
DsgpsondeB4.00:
sgpsondewrpnB6.00:
sgpsondewrprB4.a0:
sgpsondewnpnB1.a0:
sgpsondeB4.a1:
sgpsondeC1.a1:
sgpsondewrpnB4.00:
DsgpsondenogcwrpnB5.c1:
sgpsondewnpnC1.a0:
sgpsondewrpnB4.a0:
DsgpsondeB1.00:
sgpsondeB4.a0:
sgpsondewnpnB6.a1:
sgpsondewrpnB4.a1:
sgpsondewnpnB5.a1:
DsgpsondeptucalcB4.c1:
DsgpsondenogcwrpnC1.c1:
sgpsondeB5.00:
DsgpsondeptucalcB1.c1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/31/1999 | 0829 | 01/31/1999 | 0829 |
| Subject: | SGP/SONDE - Incorrect surface pressure |
| DataStreams: | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | The operator entered the THWAPS surface pressure (965.6) rather than the sonde surface pressure (963.8) into the sounding file. This will result in inaccurate ascent rates during the first 30 seconds of the sounding and inaccurate absolute altitudes throughout. |
| Measurements: | sgpsondewrpnB1.00:
sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/03/1999 | 0842 | 03/03/1999 | 0842 |
| Subject: | SGP/SONDE - Pressure jump at launch/incorrect surface values |
| DataStreams: | sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1 |
| Description: | There are two problems here. First, the operator entered the values of PTU obtained from the THWAPS as the surface values for this sounding instead of the sonde values. In doing so, the surface pressure was entered incorrected (OMIS log shows both sonde and THWAPS at 969.0), surface value is entered as 969.9. The second problem is that apparently the system misidentified the time of release and as a result the ascent rates are wrong for the first 30 seconds. The time of release problem was caused because the operator started a new sonde instead of resetting the system. I am assuming that the values of PTU are correct, but I have no way of knowing the relationship betweeen the time into the sounding and the actual altitude/pressures. It seems likely that the altitudes are OK but that they do not correspond to the actual times after phyical launch. |
| Measurements: | sgpsondewrpnB1.00:
sgpsondewrpnB1.a0:
sgpsondewrpnB1.a1:
|