DQR ID | Subject | Data Streams Affected |
---|---|---|
D040127.3 | TWP/SONDE/C2 - Broken temperature sensors | twpsondewnpnC2.b1 |
D040208.2 | TWP/SONDE/C2 - Questionable rH data | twpsondewnpnC2.b1 |
D040211.4 | TWP/MWR/C2 - thermal instability | twpmwrlosC2.b1, twpmwrtipC2.a1 |
D040219.4 | TWP/SONDE/C2 - Bad RH sensor | twpsondewnpnC2.b1 |
D040425.1 | TWP/SONDE/C2 - Bad RH values aloft | twpsondewnpnC2.b1 |
D040711.2 | TWP/SONDE/C2 - RH sensor failure near surface | twpsondewnpnC2.b1 |
D040815.1 | TWP/SONDE/C2 - Operator used wrong calibration tape | twpsondewnpnC2.b1 |
D040920.1 | TWP/MWR/C2 - Data collection problem | twpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1 |
D040921.1 | TWP/SONDE/C2 - RH sensor failure below 9km | twpsondewnpnC2.b1 |
D040921.2 | TWP/SONDE/C2 - Bad RH values aloft | twpsondewnpnC2.b1 |
D050725.10 | TWP/MWR/C2 - Reprocessed: Revised Retrieval Coefficients | twpmwrlosC2.b1, twp5mwravgC2.c1, twpqmemwrcolC2.c1 |
D050928.2 | TWP/MWR/C2 - New software version (4.15) installed | twpmwrlosC2.b1, twpmwrtipC2.a1 |
D061121.1 | TWP/MWR/C2 - Missing Data | twpmwrlosC2.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2003 | 0040 | 10/13/2003 | 0203 |
11/08/2003 | 2335 | 11/09/2003 | 0215 |
11/18/2003 | 1205 | 11/18/2003 | 1340 |
11/19/2003 | 1156 | 11/19/2003 | 1346 |
11/21/2003 | 0044 | 11/21/2003 | 0113 |
12/20/2003 | 1225 | 12/20/2003 | 1408 |
12/21/2003 | 0056 | 12/21/2003 | 0126 |
12/21/2003 | 1155 | 12/21/2003 | 1344 |
12/23/2003 | 0042 | 12/23/2003 | 0212 |
12/23/2003 | 1137 | 12/23/2003 | 1259 |
12/23/2003 | 2342 | 12/24/2003 | 0132 |
01/08/2004 | 1135 | 01/08/2004 | 1309 |
01/09/2004 | 1157 | 01/09/2004 | 1342 |
01/09/2004 | 1359 | 01/09/2004 | 1537 |
01/12/2004 | 2342 | 01/13/2004 | 0214 |
01/16/2004 | 1409 | 01/16/2004 | 1548 |
01/16/2004 | 2337 | 01/17/2004 | 0109 |
01/18/2004 | 1135 | 01/18/2004 | 1256 |
01/19/2004 | 0223 | 01/19/2004 | 0346 |
01/19/2004 | 2329 | 01/20/2004 | 0157 |
01/21/2004 | 1252 | 01/21/2004 | 1400 |
01/22/2004 | 0052 | 01/22/2004 | 0227 |
01/23/2004 | 1137 | 01/23/2004 | 1319 |
01/26/2004 | 1202 | 01/26/2004 | 0146 |
02/17/2004 | 1406 | 02/17/2004 | 1536 |
02/26/2004 | 1221 | 02/26/2004 | 1350 |
03/09/2004 | 1145 | 03/09/2004 | 1315 |
03/14/2004 | 1131 | 03/14/2004 | 1300 |
03/22/2004 | 1134 | 03/22/2004 | 1300 |
03/29/2004 | 2332 | 03/30/2004 | 0047 |
03/30/2004 | 2334 | 03/31/2004 | 0059 |
04/11/2004 | 2348 | 04/12/2004 | 0120 |
05/01/2004 | 2335 | 05/02/2004 | 0110 |
05/02/2004 | 2336 | 05/03/2004 | 0109 |
05/13/2004 | 2334 | 05/14/2004 | 0112 |
05/14/2004 | 1406 | 05/14/2004 | 1411 |
06/07/2004 | 0224 | 06/07/2004 | 0351 |
06/25/2004 | 1146 | 06/25/2004 | 1328 |
07/02/2004 | 0059 | 07/02/2004 | 0217 |
07/20/2004 | 0220 | 07/20/2004 | 0358 |
07/24/2004 | 1235 | 07/24/2004 | 1355 |
08/22/2004 | 1144 | 08/22/2004 | 1207 |
09/08/2004 | 1425 | 09/08/2004 | 1605 |
09/08/2004 | 2338 | 09/08/2004 | 2345 |
10/18/2004 | 2346 | 10/19/2004 | 0128 |
11/29/2004 | 2321 | 11/30/2004 | 0105 |
12/08/2004 | 1143 | 12/08/2004 | 1306 |
12/30/2004 | 1130 | 12/30/2004 | 1239 |
Subject: | TWP/SONDE/C2 - Broken temperature sensors |
DataStreams: | twpsondewnpnC2.b1 |
Description: | The temperature sensors on these radiosondes broke after launch. All temperature-related data are incorrect. |
Measurements: | twpsondewnpnC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/04/2004 | 1147 | 02/04/2004 | 1337 |
Subject: | TWP/SONDE/C2 - Questionable rH data |
DataStreams: | twpsondewnpnC2.b1 |
Description: | It appears that the RH sensor heating circuit failed during this sounding. The RH oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems to stop when the temperature is below ~35 degC. According to Vaisala these are symptoms of failure in the ASIC (application specific integrated circuit) that controls the heating. |
Measurements: | twpsondewnpnC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/27/2004 | 1958 | 01/31/2004 | 2059 |
Subject: | TWP/MWR/C2 - thermal instability |
DataStreams: | twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | The MWR required an unusually long time to reach thermal stability after a 4-day outage due to a power failure that damaged the blower/heater assembly. Also during this period, the heater, which had been replaced, appears to have been on continously, causing the data to be inappropriately flagged. |
Measurements: | twpmwrtipC2.a1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/18/2004 | 0035 | 02/18/2004 | 0205 |
Subject: | TWP/SONDE/C2 - Bad RH sensor |
DataStreams: | twpsondewnpnC2.b1 |
Description: | It appears that the RH sensor heating circuit failed during this sounding. The RH oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems to stop when the temperature is below ~35 degC. According to Vaisala these are symptoms of failure in the ASIC (application specific integrated circuit) that controls the heating. |
Measurements: | twpsondewnpnC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/21/2004 | 1232 | 04/21/2004 | 1248 |
Subject: | TWP/SONDE/C2 - Bad RH values aloft |
DataStreams: | twpsondewnpnC2.b1 |
Description: | It appears that the RH sensor heating circuit on this sonde failed about 24 minutes into the flight. The RH values look reasonable, though somewhat noisy, from the surface to approximately 6.9 km (439 hPa) at which point they begin to oscillate between 0 and 100 %. This behavior stops when the sonde reaches approximately 11.5km (232 hPa) when the air temperature drops below -40 degC. The oscillation stops at that point, though the RH remains higher than might be expected even under supersaturated conditions. |
Measurements: | twpsondewnpnC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/10/2004 | 1238 | 07/10/2004 | 1315 |
Subject: | TWP/SONDE/C2 - RH sensor failure near surface |
DataStreams: | twpsondewnpnC2.b1 |
Description: | It appears that the RH sensor heating circuit failed during this sounding. The RH oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems to stop when the temperature is below ~35 degC. According to Vaisala these are symptoms of failure in the ASIC (application specific integrated circuit) that controls the heating. |
Measurements: | twpsondewnpnC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/12/2004 | 0044 | 08/12/2004 | 0233 |
Subject: | TWP/SONDE/C2 - Operator used wrong calibration tape |
DataStreams: | twpsondewnpnC2.b1 |
Description: | It appears as though the opperator used the wrong calibration tape for this sounding. The primary symptom is a jump in temperature from a surface value of 30.1 degC to the first value aloft of 61.0 degC. Secondly, the recorded serial number for this sounding is Z1430179 which is the same serial number recorded for the previous sounding. This problem points to three failures of procedure (I have notified TWP site ops by e-mail). The first failure is using the wrong tape. The second failure is not checking the radiosonde values before launch which relates to the third failure of not entering the radiosonde values as the surface values of the sounding. |
Measurements: | twpsondewnpnC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/27/2004 | 2000 | 09/24/2004 | 0219 |
Subject: | TWP/MWR/C2 - Data collection problem |
DataStreams: | twpmwrC2.00, twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | Large, frequent data gaps occurred due to a failing laptop computer. The problem was corrected when a new computer was installed. |
Measurements: | twpmwrtipC2.a1:
twpmwrC2.00:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/16/2004 | 1135 | 09/16/2004 | 1210 |
Subject: | TWP/SONDE/C2 - RH sensor failure below 9km |
DataStreams: | twpsondewnpnC2.b1 |
Description: | It appears that the RH sensor heating circuit failed during this sounding. The RH oscillates rapidly between low (~0 %RH) and not so low (ambient %RH) and the oscillation seems to stop when the temperature is below ~35 degC. According to Vaisala these are symptoms of failure in the ASIC (application specific integrated circuit) that controls the heating. |
Measurements: | twpsondewnpnC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/17/2004 | 1145 | 09/17/2004 | 1216 |
09/18/2004 | 0058 | 09/18/2004 | 0133 |
09/19/2004 | 1408 | 09/19/2004 | 1447 |
Subject: | TWP/SONDE/C2 - Bad RH values aloft |
DataStreams: | twpsondewnpnC2.b1 |
Description: | It appears that the RH sensor heating circuit on these sondes failed after launch but resume proper operation when the ambient temperature dropped below ~40 degC. |
Measurements: | twpsondewnpnC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/27/2002 | 0600 | 06/30/2005 | 2100 |
Subject: | TWP/MWR/C2 - Reprocessed: Revised Retrieval Coefficients |
DataStreams: | twpmwrlosC2.b1, twp5mwravgC2.c1, twpqmemwrcolC2.c1 |
Description: | IN THE BEGINNING (June 1992), the retrieval coefficients used to derive the precipitable water vapor (PWV) and liquid water path (LWP) from the MWR brightness temperatures were based on the Liebe and Layton (1987) water vapor and oxygen absorption model and the Grant (1957) liquid water absorption model. Following the SHEBA experience, revised retrievals based on the more recent Rosenkranz (1998) water vapor and oxygen absorption models and the Liebe (1991) liquid waer absorption model were developed. The Rosenkranz water vapor absorption model resulted a 2 percent increase in PWV relative to the earlier Liebe and Layton model. The Liebe liquid water absorption model decreased the LWP by 10% relative to the Grant model. However, the increased oxygen absorption caused a 0.02-0.03 mm (20-30 g/m2) reduction in LWP, which was particularly significant for low LWP conditions (i.e. thin clouds encountered at SHEBA). Recently, it has been shown (Liljegren, Boukabara, Cady-Pereira, and Clough, TGARS v. 43, pp 1102-1108, 2005) that the half-width of the 22 GHz water vapor line from the HITRAN compilation, which is 5 percent smaller than the Liebe and Dillon (1969) half-width used in Rosenkranz (1998), provided a better fit to the microwave brightness temperature measurements at 5 frequencies in the range 22-30 GHz, and yielded more accurate retrievals. Accordingly, revised MWR retrieval coefficients have been developed using MONORTM, which utilizes the HITRAN compilation for its spectroscopic parameters. These new retrievals provide 3 percent less PWV and 2.6 percent greater LWP than the previous retrievals based on Rosenkranz (1998). The Rosenkranz-based retrieval coefficients became active at TWP.C2 20020427.0600. The MONORTM-based retrieval coefficients became active at TWP.C2 20050630.2100. Note: The TWP.C2 data for 19981028-20050630 have been reprocessed to apply the MONORTM-based retrievals for all time. The reprocessed data were archived 20061003. |
Measurements: | twpqmemwrcolC2.c1:
twp5mwravgC2.c1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/01/2002 | 2101 | 09/15/2005 | 1424 |
Subject: | TWP/MWR/C2 - New software version (4.15) installed |
DataStreams: | twpmwrlosC2.b1, twpmwrtipC2.a1 |
Description: | A problem began with the installation of MWR.EXE version 4.12 in November 2002. The software had been upgraded from a "DOS" to a "Windows"-compiled program to address an earlier problem. The software upgrade corrected the earlier problem but introduced a new one that caused line-of-sight observing cycles to be skipped, a 15% reduction in the number of tip curves, and saturation of CPU usage. Software versions 4.13 and 4.14 also produced these problems. The new MWR software version (4.15) was installed on 9/15/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s. |
Measurements: | twpmwrtipC2.a1:
twpmwrlosC2.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/02/1998 | 2112 | 11/06/1998 | 2140 |
07/02/2000 | 2000 | 07/04/2000 | 0047 |
02/09/2002 | 2300 | 02/11/2002 | 2300 |
01/23/2004 | 1100 | 01/27/2004 | 1957 |
05/27/2005 | 1143 | 05/29/2005 | 2132 |
Subject: | TWP/MWR/C2 - Missing Data |
DataStreams: | twpmwrlosC2.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | twpmwrlosC2.b1:
|