| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D050725.1 | SGP/SONDE/C1 - Bad RH Data | sgpsondewnpnC1.b1 |
| D050811.5 | SGP/SONDE/C1 - Bad T/RH and surface P. | sgpsondewnpnC1.b1 |
| D050912.2 | SGP/SONDE/C1 - Temperature/RH incorrect | sgplssondeC1.c1, sgpsondewnpnC1.b1 |
| D051027.1 | SGP/SONDE/C1 - Bad RH Data | sgpsondewnpnC1.b1 |
| D060928.3 | SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry | sgpsondewnpnC1.b1 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/17/2005 | 2347 | 07/18/2005 | 0141 |
| Subject: | SGP/SONDE/C1 - Bad RH Data |
| DataStreams: | sgpsondewnpnC1.b1 |
| Description: | The RH values below 6 km are incorrect. The problem relates to a failure of the GC25 ground check set used before this particular sounding. The failure seems to have affected the sensor calibration with the effect that one of the two sensors was reading artificially high. Because the internal processing software uses the highest of the two sensor readings, the bad sensor value is chosen whenever it is not heated. |
| Measurements: | sgpsondewnpnC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 08/01/2005 | 1132 | 08/01/2005 | 0116 |
| Subject: | SGP/SONDE/C1 - Bad T/RH and surface P. |
| DataStreams: | sgpsondewnpnC1.b1 |
| Description: | Apparently multiple failures. The radiosonde temperature sensor broke on launch causing an approximate 35 degC negative offset and as a result, the RH is incorrect. Furthermore, it appears that the pressure sensor was off by approximately 4 hPa, though this would not affect the altitude calculation, the absolute pressure is wrong. |
| Measurements: | sgpsondewnpnC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/09/2005 | 1132 | 09/09/2005 | 1332 |
| Subject: | SGP/SONDE/C1 - Temperature/RH incorrect |
| DataStreams: | sgplssondeC1.c1, sgpsondewnpnC1.b1 |
| Description: | The temperature throughout this sounding is too high and as a result the RH values will be incorrect as well. I'm not sure what is wrong here but the operators noted reasonable values (18.1 degC, 87%) in the log before launch. Review of the raw data, however, shows the sonde reporting temperatures nearly 20 degC higher. I suppose it is possible that the operator entered into the log the reference temperature from the GC25 ground check set rather than the temperature reported by the sonde - I can't think of any other explanation - there is no doubt that the temperature sensor on this sonde was bad. |
| Measurements: | sgpsondewnpnC1.b1:
sgplssondeC1.c1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 10/24/2005 | 1140 | 10/24/2005 | 1204 |
| Subject: | SGP/SONDE/C1 - Bad RH Data |
| DataStreams: | sgpsondewnpnC1.b1 |
| Description: | The RH values during this sounding oscillate between reasonable values and near-zero values. The oscillation is due to failure of the RH sensor heating process. |
| Measurements: | sgpsondewnpnC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 09/28/2006 | 1728 | 12/31/9999 | 2359 |
| Subject: | SGP/SONDE/C1 - Increased precision for alt, dp, pres, rh, tdry |
| DataStreams: | sgpsondewnpnC1.b1 |
| Description: | The output precision of the following variables was increased 20060928 alt changed from 1m to 0.1m dp changed from 0.1degC to 0.01degC pres changed from 0.1 hPa to 0.01 hPa RH changed from 1%RH to 0.01%RH tdry changed from .1degC to 0.01degC Note that the increase in precision does not necessarily imply an increase in accuracy. Users are cautioned to continue to use their best scientific judgement when using these or any other data. |
| Measurements: | sgpsondewnpnC1.b1:
|