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 |
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 |
D990210.1 | SGP/SONDE - Wrong cal tape | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1 |
D990303.1 | SGP/SONDE - Pressure jump at launch | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D990329.1 | Incorrect surface RH | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D990513.1 | SGP/SONDE - RH probably biased low in several soundings | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D991221.1 | SGP/SONDE - Incorrect surface temperature | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
D991228.1 | SGP/SONDE - Incorrect surface temperature | 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: | sgpsondewrpnC1.a0:
sgpsondewrpnB5.a1:
sgpsondewrpnB4.a0:
sgpsondewrpnB1.a0:
sgpsondewrpnB6.a0:
sgpsondewrpnB5.a0:
sgpsondewrpnB4.a1:
sgpsondewrpnB6.a1:
sgpsondewrpnC1.a1:
sgpsondewrpnB1.a1:
|
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: | sgpsondeB4.00:
DsgpsondeB5.00:
sgpsondewrpnC1.00:
sgpsondewnpnC1.a1:
DsgpsondeptuB6.00:
DsgpsondenogcptucalcB1.c1:
sgpsondewrpnB6.a0:
DsgpsondeptuC1.00:
sgpsondewnprC1.a0:
DsgpsondenogcptucalcB5.c1:
DsgpsondeptucalcC1.c1:
sgpsondewnpnB4.a1:
sgpsondeB6.00:
sgpsondewrprB4.00:
DsgpsondeptuB1.00:
DsgpsondenogcptucalcC1.c1:
sgpsondewrpnC1.a1:
sgpsondewrpnB1.a1:
sgpsondewrprC1.00:
sgpsondewrpnB1.a0:
sgpsondewrprB5.a1:
sgpsondeB5.a1:
sgpsondewrprB5.00:
DsgpsondeC1.00:
sgpsondewrprB1.a1:
sgpsondeB1.00:
sgpsondeptuC1.00:
DsgpsondenogcptucalcB4.c1:
DsgpsondeB1.a0:
DsgpsondeC1.a1:
DsgpsondeptucalcB5.c1:
sgpsondewrprB1.00:
sgpsondewrpnC1.a0:
sgpsondewrpnB1.00:
sgpsondeB1.a0:
DsgpsondeC1.a0:
DsgpsondeB4.a1:
DsgpsondeptuB4.00:
sgpsondeB1.a1:
sgpsondewrprB5.a0:
sgpsondeC1.00:
sgpsondewnpnB1.a1:
sgpsondewrpnB6.a1:
sgpsondewrprC1.a0:
sgpsondeC1.a0:
sgpsondewrprC1.a1:
DsgpsondeptuB5.00:
sgpsondewrpnB5.a0:
sgpsondewrprB4.a1:
DsgpsondeB1.a1:
sgpsondeB5.a0:
sgpsondewnpnB6.a0:
DsgpsondeB5.a1:
DsgpsondenogcwrpnB1.c1:
sgpsondewrprB1.a0:
sgpsondewrpnB5.00:
DsgpsondeB4.a0:
DsgpsondenogcwrpnB4.c1:
DsgpsondeB5.a0:
sgpsondewnpnB4.a0:
sgpsondewnprC1.a1:
sgpsondewrpnB5.a1:
sgpsondewnpnB5.a0:
DsgpsondeB4.00:
sgpsondewrpnB6.00:
sgpsondewrprB4.a0:
sgpsondewnpnB1.a0:
sgpsondeB4.a1:
sgpsondeC1.a1:
sgpsondewrpnB4.00:
DsgpsondenogcwrpnB5.c1:
sgpsondewnpnC1.a0:
sgpsondewrpnB4.a0:
DsgpsondeB1.00:
sgpsondeB4.a0:
sgpsondewnpnB6.a1:
sgpsondewrpnB4.a1:
sgpsondewnpnB5.a1:
DsgpsondeptucalcB4.c1:
DsgpsondenogcwrpnC1.c1:
sgpsondeB5.00:
DsgpsondeptucalcB1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/09/1999 | 0834 | 02/09/1999 | 1016 |
Subject: | SGP/SONDE - Wrong cal tape |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1, sgpsondewndcalcC1.c1 |
Description: | There is something wrong with this sounding, its not clear exactly what happened, however. The first values reported by the radiosonde are much different from those entered by the operator. My impression is that this is a calibration tape mixup. The raw data file shows that the sounding software was initialized twice for this sounding, the first time showing sonde 823360910, the second time showing sonde 819351814. There is no enties in the operations log that describe a problem with a sonde before launch. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewndcalcC1.c1:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/02/1999 | 0828 | 03/02/1999 | 0828 |
Subject: | SGP/SONDE - Pressure jump at launch |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | The difference between the sonde-reported pressure at the surface (969.1 hPa) and the first pressure value reported after launch (963.5) is larger than expected. This may indicate that either the pressure sensor was jarred at launch, that the system failed to correctly identify the launch start time, or some other problem. The ascent rates during the first 30 seconds of the sounding will be incorrect as will the absolute altitudes during the sounding. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/22/1999 | 0230 | 03/22/1999 | 0230 |
Subject: | Incorrect surface RH |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | The operator entered an incorrect value (7.5%) for the surface RH for this sounding. The correct value should have been 70%. The operator noticed the error after the sounding had been completed and reported it in his log. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/10/1999 | 1130 | 05/11/1999 | 2041 |
Subject: | SGP/SONDE - RH probably biased low in several soundings |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | In the process of moving storage facilties, site operations uncovered some old radiosondes (vintage April 1998) that were used in several soundings starting on May 10 at 0530 and continuing at least through May 11 at 2040. Because these sondes are so old and pre-date Vaisala's repackaging they are likely subject to the sensor contamination problem that results in a dry bias in RH. The sondes in question have serial numbers 816XXXXXX. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/1999 | 0530 | 12/18/1999 | 0530 |
Subject: | SGP/SONDE - Incorrect surface temperature |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | The operator entered 20.0 degrees rather than the true temperature of 2.0 degrees. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/22/1999 | 2330 | 12/22/1999 | 2330 |
Subject: | SGP/SONDE - Incorrect surface temperature |
DataStreams: | sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
Description: | The operator entered the surface temperature as 25 degC rather than the correct 2.5 deg C. This is the second time in a week this type of error has occurred. I have sent a separate e-mail to site ops. |
Measurements: | sgpsondewrpnC1.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|