| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D030312.10 | SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgp1mwravgC1.c1, sgp5mwravgC1.c1 |
| D040526.2 | SGP/AERI/C1 - Metadata errors | sgpaeri01ch1C1.a1, sgpaeri01ch2C1.a1, sgpqmeaerilblC1.c1, sgpaerilbldiffC1.c1, sgpqmeaerilbllsC1.c1, sgpqmeaerimeansC1.c1, sgpaeri01summaryC1.a1, sgpaerilblcloudsC1.c1, sgpaerilbldifflsC1.c1, sgpaeri01engineerC1.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 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 11/17/1999 | 1800 | 07/31/2002 | 2034 |
| Subject: | SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures |
| DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgp1mwravgC1.c1, sgp5mwravgC1.c1 |
| Description: | Several related and recurring problems with the SGP MWRs have been reported dating back to 1999. These problems were due to the occurrence of blackbody signals (in counts) that were half of those expected. The symptoms included noisy data (especially at Purcell), spikes in the data (especially at Vici), negative brightness temperatures, and apparent loss of serial communication between the computer and the radiometer, which results in a self-termination of the MWR program (especially at the CF). Because these all initially appeared to be hardware-related problems, the instrument mentor and SGP site operations personnel (1) repeatedly cleaned and replaced the fiber optic comm. components, (2) swapped radiometers, (3) sent radiometers back to Radiometrics for evaluation (which has not revealed any instrument problems), and (4) reconfigured the computer's operating system. Despite several attempts to isolate and correct it, the problem persisted. It became apparent that some component of the Windows98 configuration conflicted with the DOS-based MWR program or affected the serial port or the contents of the serial port buffer. This problem was finally corrected by upgrading the MWR software with a new Windows-compatible program. |
| Measurements: | sgp5mwravgC1.c1:
sgp1mwravgC1.c1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/22/1995 | 0012 | 05/14/2003 | 2359 |
| Subject: | SGP/AERI/C1 - Metadata errors |
| DataStreams: | sgpaeri01ch1C1.a1, sgpaeri01ch2C1.a1, sgpqmeaerilblC1.c1, sgpaerilbldiffC1.c1, sgpqmeaerilbllsC1.c1, sgpqmeaerimeansC1.c1, sgpaeri01summaryC1.a1, sgpaerilblcloudsC1.c1, sgpaerilbldifflsC1.c1, sgpaeri01engineerC1.a1 |
| Description: | The latitude, longitude and altitude of the AERI were incorrectly entered into the ARM database. The correct location of the SGP.C1 AERI is: Lat: 36.606N Lon: 97.485W Alt: 316m |
| Measurements: | sgpaeri01ch1C1.a1:
sgpaerilbldifflsC1.c1:
sgpaeri01summaryC1.a1:
sgpaerilblcloudsC1.c1:
sgpaeri01engineerC1.a1:
sgpaeri01ch2C1.a1:
sgpaerilbldiffC1.c1:
sgpqmeaerimeansC1.c1:
sgpqmeaerilblC1.c1:
sgpqmeaerilbllsC1.c1:
|
| 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:
|