| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D001218.1 | SGP/SONDE/B1 - Incorrect surface temperature | sgpsondewnpnB1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1 |
| D001221.3 | SGP/SONDE/B1 - Bad sounding data (incorrect calibration?) | sgpsondewnpnB1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1 |
| D021110.2 | SGP/SONDE/B4 - Soundings contaminated by interference | sgplssondeB4.c1, sgpqmemwrcolB4.c1, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1 |
| D021112.2 | SGP/SONDE/B4 - Possible interference in B4 sounding 20021110.1729 | sgpsondeB4.00, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1 |
| D021117.2 | SGP/SONDE/B4 - B4 sounding contaminated by interference | sgpsondeB4.00, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1 |
| D021121.2 | SGP/SONDE/B1 - Temperature sensor failed | sgpsondewnpnB1.a1, sgpsondewnpnB1.b1 |
| 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 |
|---|---|---|---|
| 12/12/2000 | 2330 | 12/12/2000 | 2330 |
| Subject: | SGP/SONDE/B1 - Incorrect surface temperature |
| DataStreams: | sgpsondewnpnB1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1 |
| Description: | The operator entered 8.1 degC as the surface temperature for this sounding instead of -8.1 degC. This is the only value affected. |
| Measurements: | sgpsondewnpnB1.a0:
sgpsondewnpnB1.a1:
sgpsondewnpnB1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 12/16/2000 | 1430 | 12/16/2000 | 1700 |
| Subject: | SGP/SONDE/B1 - Bad sounding data (incorrect calibration?) |
| DataStreams: | sgpsondewnpnB1.00, sgpsondewnpnB1.a0, sgpsondewnpnB1.a1 |
| Description: | I'm not sure what happened here but the temperature data for this sounding clearly are wrong. Along with the missing humidity data and the problems the operator reported with his previous sounding it looks as if all the data in this file are bad. It may be that the sensor was damaged at launch (it was very windy). |
| Measurements: | sgpsondewnpnB1.a0:
sgpsondewnpnB1.a1:
sgpsondewnpnB1.00:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/07/2002 | 1130 | 11/07/2002 | 1316 |
| 11/07/2002 | 1429 | 11/07/2002 | 1629 |
| 11/07/2002 | 1730 | 11/07/2002 | 1930 |
| 11/07/2002 | 2029 | 11/07/2002 | 2239 |
| 11/07/2002 | 2331 | 11/08/2002 | 0131 |
| Subject: | SGP/SONDE/B4 - Soundings contaminated by interference |
| DataStreams: | sgplssondeB4.c1, sgpqmemwrcolB4.c1, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1 |
| Description: | These five soundings, done in succession on 11/07/2002 as part of the SCM/IOP are contaminated by interference. I can't tell whether the problem has to do with improper tuning of the radiosondes, inadequate frequency separation among radiosondes launched from different locations, or some other operator problem. I suspect that there is an operator component to the difficulty because the surface pressure is given as an unreasonably low 896.6 hPa on the 1730 sounding and 886.1 hPa on the 2331 sounding. This may indicate that the ground station was locked another station's radiosonde rather than on the B4 radiosonde. |
| Measurements: | sgplssondeB4.c1:
sgpsondewnpnB4.b1:
sgpqmemwrcolB4.c1:
sgpsondewnpnB4.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/10/2002 | 1824 | 11/10/2002 | 1848 |
| Subject: | SGP/SONDE/B4 - Possible interference in B4 sounding 20021110.1729 |
| DataStreams: | sgpsondeB4.00, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1 |
| Description: | There is a strange inversion aloft in the subject sounding. The temperature goes from -56.3 degC to -51.5 degC in less than two minutes (approximately .72 km). This is somewhat below the estimated tropopause height. I suspect this may be an interference problem, but note that both the recorded pressure and RH values are reasonably continuous. More accurate assessment would require analysis of the absolutely raw binary data; something that would require effort beyond the limits of my IM funding. |
| Measurements: | sgpsondewnpnB4.b1:
sgpsondeB4.00:
sgpsondewnpnB4.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/14/2002 | 0830 | 11/14/2002 | 1010 |
| Subject: | SGP/SONDE/B4 - B4 sounding contaminated by interference |
| DataStreams: | sgpsondeB4.00, sgpsondewnpnB4.a1, sgpsondewnpnB4.b1 |
| Description: | Much of this sounding is contaminated, apparently by interference from another sonde signal. It is still no clear why this seems to happen more frequently at B4 than the other sites, especially since the wind seems to have been from the west and B4 should be the most upwind station. |
| Measurements: | sgpsondewnpnB4.b1:
sgpsondeB4.00:
sgpsondewnpnB4.a1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/18/2002 | 2043 | 11/18/2002 | 2229 |
| Subject: | SGP/SONDE/B1 - Temperature sensor failed |
| DataStreams: | sgpsondewnpnB1.a1, sgpsondewnpnB1.b1 |
| Description: | It appears that the temperature sensor on this sonde broke shortly after launch with the effect that the temperatures read approximately 30 degC too low. Other measurements that do not rely on the temperature, for example pressure and wind velocity, should be OK. |
| Measurements: | sgpsondewnpnB1.a1:
sgpsondewnpnB1.b1:
|
| 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:
|