| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| 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 |
| D980126.2 | Incorrect surface temperature and humidity | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D980506.1 | Incorrect surface values | sgpsondewrpnC1.a1 |
| D980507.4 | Incorrect surface pressure | sgpsondewrpnC1.a1 |
| D980511.2 | Incorrect surface pressure | sgpsondewrpnC1.a1 |
| D980716.1 | Bad sounding | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D980917.1 | Incorrect surface readings | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| D980917.2 | Incorrect surface RH | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.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 |
|---|---|---|---|
| 01/19/1998 | 1130 | 01/19/1998 | 1130 |
| Subject: | Incorrect surface temperature and humidity |
| DataStreams: | sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | Incorrect values of surface temperature and relative humidity were entered by the operator. The surface temperature was entered as 17.5 degC; the first value reported by the sonde was -3.6 degC. The surface humidity was entered as 26; the first value reported by the sonde was 81%. It appears that the operator used the inside temperature/humidity rather than the sonde-reported outside temperature/humidity. Only the first few samples of the sounding will be affected. Note that the delta-check QC flag is set by this error. |
| Measurements: | sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 04/29/1998 | 1431 | 04/29/1998 | 1431 |
| Subject: | Incorrect surface values |
| DataStreams: | sgpsondewrpnC1.a1 |
| Description: | The surface pressure, temperature, and relative humidity are incorrect for this soundings. The values in the sounding netCDF file (975.6, 3.2, 86) are different from the surface observations in the site ops log (978.9, 9.1, and 83) and from the values in the raw radiosonde data file at the moment just before ascent (978.7, 9.5, 83). The reason for the differences are unknown, but insofar as the surface values are manually entered by the operator into both the log (where they are correct) and into the sounding file (where they are incorrect) an operator miscue is a possibility. The major effect of this problem will be incorrect absolute altitude. |
| Measurements: | sgpsondewrpnC1.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 |
|---|---|---|---|
| 07/14/1998 | 2346 | 07/14/1998 | 2346 |
| Subject: | Bad sounding |
| DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
| Description: | Data from this sounding look very fragmented as if only a few actual points were collected and intermediate points were intepolated. In a general sense this sounding looks 'weird' and should not be trusted. I do not yet have access to r1 so I can't look at the raw data, but I doubt that it will shed much light on the situation. |
| Measurements: | sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
sgpsondewrpnC1.a0:
|
| 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:
|