DQR ID | Subject | Data Streams Affected |
---|---|---|
D000308.1 | SGP/SONDE - Questionable absolute pressures | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D000308.2 | SGP/SONDE - Questionable absolute pressures | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D020611.2 | SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etc | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020626.34 | SGP/SONDE/C1 - Incorrect Surface Pressure | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020626.35 | SGP/SONDE/C1 - Bad Temperature Sensor | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D020703.1 | SGP/SONDE/C1 - Temperature sensor failure | sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021117.1 | SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021121.1 | SGP/SONDE/C1 - Contaminated by interference | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021123.2 | SGP/SONDE/C1 - Interference CF sounding 20021120:0225 | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
D021201.1 | SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130 | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
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 |
D980507.4 | Incorrect surface pressure | sgpsondewrpnC1.a1 |
D980511.2 | Incorrect surface pressure | sgpsondewrpnC1.a1 |
D980917.1 | Incorrect surface readings | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D980917.2 | Incorrect surface RH | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D990124.2 | SGP/SONDE - Dry bias in sonde RH | sgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0, sgpsondeB4.a1, sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00, sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, sgpsondeptuC1.00, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0, sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1, sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00, sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0, sgpsondewrprB4.a1, sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00, sgpsondewrprC1.a0, sgpsondewrprC1.a1, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/03/2000 | 2328 | 03/04/2000 | 0051 |
Subject: | SGP/SONDE - Questionable absolute pressures |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | The sonde surface pressure reading was considerably higher than the corresponding THWAPS pressure (988.0 hPa vs 982.3 hPa). The sonde readings are consistent during the sounding, however, suggesting that this is not a case of a pressure jump at launch but one of sensor offset. This problem will only affect those who use the absolute pressure values. The file altitudes, which are based on the relative pressure changes from the surface, should be fine. |
Measurements: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/04/2000 | 0229 | 03/04/2000 | 0359 |
Subject: | SGP/SONDE - Questionable absolute pressures |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | The sonde surface pressure reading was considerably higher than the corresponding THWAPS pressure (992.9 hPa vs 983.0 hPa). The sonde readings are consistent during the sounding, however, suggesting that this is not a case of a pressure jump at launch but one of sensor offset. This problem will only affect those who use the absolute pressure values. The file altitudes, which are based on the relative pressure changes from the surface, should be fine. |
Measurements: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/09/2002 | 0229 | 06/09/2002 | 0236 |
Subject: | SGP/SONDE/C1 - CF sounding 20020609:0229 bad temp/rh/etc |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The temperature and RH for this sounding look bad, either because of interference from another sonde or because the temperature sensor was broken on launch. The sounding terminated early in any event. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/17/2002 | 1128 | 06/17/2002 | 1313 |
Subject: | SGP/SONDE/C1 - Incorrect Surface Pressure |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the operator made a typographical error when entering the surface pressure. The file has 987.0 hPa and it probably should be 978.0 which would be consistent with the first sample provided by the radiosonde (977.3 hPa), the surface pressures recorded for the adjacent soundings, and the THWAPS pressure. Because the sounding altitude is calculated assuming the surface pressure is correct, the altitude values for the entire flight and the ascent rate values for the first 30 seconds of the sounding will be incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/19/2002 | 2329 | 06/20/2002 | 0036 |
Subject: | SGP/SONDE/C1 - Bad Temperature Sensor |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | It appears that the temperature sensor broke shortly after launch. As a result, the temperature and dewpoint values are incorrect. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/27/2002 | 1728 | 06/27/2002 | 1908 |
Subject: | SGP/SONDE/C1 - Temperature sensor failure |
DataStreams: | sgpqmemwrcolC1.c1, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | Temperature sensor broke at launch. All temperature-related variables are incorrect. |
Measurements: | sgpqmemwrcolC1.c1:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/13/2002 | 2044 | 11/13/2002 | 2205 |
Subject: | SGP/SONDE/C1 - Questionable RH: CF sounding 11/13/2002:2044 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The RH data in this sounding is erratic between 2km and 10 km, oscillating between reasonable values (~40%RH) and zero. I certainly doubt that this is a real, heretofore unreported, atmospheric phenomenon so I have to conclude that something is probably wrong with the sensor. I have not seen this behavior before. One would have to look at the absolutely raw RH data to explore further. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/19/2002 | 1423 | 11/19/2002 | 1623 |
11/19/2002 | 1726 | 11/19/2002 | 1917 |
11/19/2002 | 2026 | 11/19/2002 | 2204 |
Subject: | SGP/SONDE/C1 - Contaminated by interference |
DataStreams: | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | These three soundings are contaminated by interference from another radiosonde. It is not clear why; this doesn't usually happen at the CF where the operators are very experienced and frequency separation is not usually a problem. |
Measurements: | sgpsondeC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/20/2002 | 0225 | 11/20/2002 | 0412 |
Subject: | SGP/SONDE/C1 - Interference CF sounding 20021120:0225 |
DataStreams: | sgpsondeC1.00, sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | Like several soundings on 11/19, this sounding was affected by interference from another radiosonde. |
Measurements: | sgpsondeC1.00:
sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/21/2002 | 1130 | 11/21/2002 | 1311 |
Subject: | SGP/SONDE/C1 - Questionable RH CF sounding 0211211:1130 |
DataStreams: | sgpsondewnpnC1.a1, sgpsondewnpnC1.b1 |
Description: | The RH samples in this sounding oscillate between reasonable values (60-80%) and zero. This may be a problem with the RH sensor or the software that alternates between the heated and non-heated RH elements. In either case, the reported values are questionable. More investigation of the raw binary data would be required to diagnose further. |
Measurements: | sgpsondewnpnC1.b1:
sgpsondewnpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/01/1998 | 0000 | 12/31/1999 | 2359 |
Subject: | Incorrect radiosonde serial numbers |
DataStreams: | sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | Radiosondes manufactured at Vaisala's Woburn, MA factory during the first of January 1998 have incorrect serial numbers. Instead of being numbered 8012XXXXX these sondes are numbered 7012XXXXX. Vaisala has been informed of this, has confirmed the problem, and has corrected their numbering for all subsequent sondes. 163 incorrectly numbered sondes were shipped to ARM on 1/9/98. Some have been used at the CF since 1/19/98:1430. |
Measurements: | sgpsondewrpnB4.a0:
sgpsondewrpnB5.a0:
sgpsondewrpnB5.a1:
sgpsondewrpnB4.a1:
sgpsondewrpnB1.a1:
sgpsondewrpnB1.a0:
sgpsondewrpnB6.a0:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
sgpsondewrpnB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/06/1998 | 0832 | 05/06/1998 | 0832 |
Subject: | Incorrect surface pressure |
DataStreams: | sgpsondewrpnC1.a1 |
Description: | The operator transposed the digits of the surface pressure entering 976.3 instead of 967.3. The ops log shows 967.3 for the sonde and 968.3 for the THWAPS. Analysis of the absolutely raw sonde data shows 968.0 at the system-identified launch time. Note that because the output pressure data are smoothed, under the assumption that the surface data value is true, the first value reported by the sonde after launch 970.4 also is incorrect. The raw value corresponding to the sample after launch is 966.6. The absolute pressure values will be incorrect for the first few samples of the sounding, as will be the ascent rates for the first 30 seconds. The absolute altitude values also will be in error. |
Measurements: | sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/09/1998 | 1431 | 05/09/1998 | 1431 |
Subject: | Incorrect surface pressure |
DataStreams: | sgpsondewrpnC1.a1 |
Description: | The operator entered 960.2 for the surface pressure in both the log and the system. The first reading from the sonde is 950.9. Examination of the absolutely raw data shows that the sonde pressure before launch was 952.3. The THWAPS reading was 964.2. From the raw data it appears that either the system was not reset before this sounding or that a second sonde was started without resetting the system. The sonde pressure may be low in absolute terms or the operator may have mis-entered the actual sonde reading. In either case the absolute altitude will be wrong in this sounding and the ascent rates will be incorrect for the first 30 seconds. |
Measurements: | sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/09/1998 | 2029 | 05/09/1998 | 2029 |
Subject: | Incorrect surface readings |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | It appears that the operator entered an incorrect set of surface data for the subject sounding. The sounding has surface PTU as 975.6 hPa, 20.0 degC, and 93% RH - the corresponding THWAPS readings are 969.7 hPa, 19.9 degC, and 72.1 %RH. The OMIS log for the subject souding shows sonde surface values of 969.2 hPa, 17.6 degC, and 70% RH. |
Measurements: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/1998 | 2329 | 05/07/1998 | 2329 |
Subject: | Incorrect surface RH |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | Because of what appears to be a typographical error, the operator entered 5% RH when the surface RH was 54% RH. The corresponding THWAPS reading is 50.1% RH and the OMIS log shows 54%RH. |
Measurements: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/27/1992 | 0000 | 05/31/2002 | 2359 |
Subject: | SGP/SONDE - Dry bias in sonde RH |
DataStreams: | sgpsondeB1.00, sgpsondeB1.a0, sgpsondeB1.a1, sgpsondeB4.00, sgpsondeB4.a0, sgpsondeB4.a1, sgpsondeB5.00, sgpsondeB5.a0, sgpsondeB5.a1, sgpsondeB6.00, sgpsondeC1.00, sgpsondeC1.a0, sgpsondeC1.a1, DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, sgpsondeptuC1.00, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1, sgpsondewnpnB4.a0, sgpsondewnpnB4.a1, sgpsondewnpnB5.a0, sgpsondewnpnB5.a1, sgpsondewnpnB6.a0, sgpsondewnpnB6.a1, sgpsondewnpnC1.a0, sgpsondewnpnC1.a1, sgpsondewnprC1.a0, sgpsondewnprC1.a1, sgpsondewrpnB1.00, sgpsondewrpnB1.a0, sgpsondewrpnB1.a1, sgpsondewrpnB4.00, sgpsondewrpnB4.a0, sgpsondewrpnB4.a1, sgpsondewrpnB5.00, sgpsondewrpnB5.a0, sgpsondewrpnB5.a1, sgpsondewrpnB6.00, sgpsondewrpnB6.a0, sgpsondewrpnB6.a1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewrprB1.00, sgpsondewrprB1.a0, sgpsondewrprB1.a1, sgpsondewrprB4.00, sgpsondewrprB4.a0, sgpsondewrprB4.a1, sgpsondewrprB5.00, sgpsondewrprB5.a0, sgpsondewrprB5.a1, sgpsondewrprC1.00, sgpsondewrprC1.a0, sgpsondewrprC1.a1, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1 |
Description: | Vaisala has confirmed ARM findings of an apparent dry bias in the relative humidity measured by RS-80H radiosondes. The cause of the dry bias is thought to be contamination of the humidity sensor by volatile organic substances originating from some plastic parts of the radiosonde. The amount of contamination is a function of the time between the date of sonde manufacture and its use. All RS-80H sondes manufactured before week 34 of 1998 will show this bias. After week 34 of 1998 Vaisala changed its packaging to reduce, but not eliminate the contamination problem. Starting with RS-80 radiosonde manufactured in late June 2000 Vaisala enclosed the sensor boom in an inert plastic shield, thereby eliminating the contamination that caused the dry bias. Starting in May 2001 at the SGP, May 2002 at the TWP, and later 2002 at the NSA, ARM has moved to using RS-90 radiosondes. These sondes are not subject to the contaminatino that caused the dry bias. Vaisala is in the process of developing an algorithm that can be used to estimate the correct RH from knowledge of the sonde age. All of the ARM sounding data have sufficient metadata available to apply the correction. Additionally, ARM has funded a Science Team effort (Milosevich) to develop a 'best' correction algorithm for the RS-80 radiosonde humidity data. When completed this algorithm will allow us to reprocess the accumulated RS-80 data and produce a new data platform with what we hope will be more accurate data. |
Measurements: | sgpsondeptuC1.00:
sgpsondeB4.a1:
sgpsondeB4.a0:
DsgpsondeptuB4.00:
sgpsondewrprB1.00:
DsgpsondeC1.a1:
DsgpsondeB5.a0:
DsgpsondeC1.a0:
sgpsondewrpnC1.a1:
sgpsondewnprC1.a1:
DsgpsondenogcptucalcC1.c1:
sgpsondewrpnB5.00:
sgpsondewrpnB4.a0:
sgpsondewnpnB1.a0:
sgpsondewnpnB1.a1:
DsgpsondeB5.a1:
sgpsondewrprB4.a1:
sgpsondewrpnB4.a1:
DsgpsondeB4.a0:
sgpsondewrpnB6.00:
DsgpsondeB4.a1:
sgpsondewrprB4.a0:
DsgpsondeptuB6.00:
sgpsondewnpnC1.a0:
sgpsondewrpnB6.a0:
DsgpsondeptuB5.00:
sgpsondewnpnC1.a1:
DsgpsondenogcwrpnB4.c1:
DsgpsondeB4.00:
sgpsondewrpnB6.a1:
DsgpsondenogcptucalcB4.c1:
DsgpsondeC1.00:
DsgpsondeptuC1.00:
DsgpsondeptucalcB1.c1:
DsgpsondeptucalcB5.c1:
sgpsondewrpnB1.00:
sgpsondewrpnB1.a1:
sgpsondewrpnB1.a0:
DsgpsondeptuB1.00:
DsgpsondeB1.00:
DsgpsondeptucalcB4.c1:
DsgpsondenogcwrpnB5.c1:
sgpsondewrpnB5.a0:
sgpsondewrpnB5.a1:
DsgpsondenogcptucalcB1.c1:
sgpsondeC1.00:
sgpsondewrprB4.00:
sgpsondeB4.00:
sgpsondewrprB1.a0:
sgpsondewrprC1.00:
sgpsondewrprB1.a1:
sgpsondewnpnB5.a0:
sgpsondeB1.a0:
DsgpsondeB5.00:
sgpsondewnpnB5.a1:
sgpsondeB1.a1:
sgpsondewnpnB4.a1:
sgpsondewnpnB6.a0:
sgpsondewnpnB6.a1:
sgpsondewnpnB4.a0:
DsgpsondenogcwrpnB1.c1:
sgpsondeB5.00:
sgpsondeB6.00:
DsgpsondenogcptucalcB5.c1:
sgpsondewrprB5.00:
DsgpsondeptucalcC1.c1:
DsgpsondenogcwrpnC1.c1:
sgpsondeC1.a1:
sgpsondeC1.a0:
DsgpsondeB1.a0:
sgpsondewrpnC1.00:
sgpsondeB5.a0:
sgpsondewrpnB4.00:
sgpsondeB5.a1:
DsgpsondeB1.a1:
sgpsondewrprC1.a1:
sgpsondewrprB5.a0:
sgpsondewrprB5.a1:
sgpsondewrpnC1.a0:
sgpsondewnprC1.a0:
sgpsondeB1.00:
sgpsondewrprC1.a0:
|