DQR ID | Subject | Data Streams Affected |
---|---|---|
D000606.1 | SGP/MWR/C1 - IRT removed | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
D020620.22 | SGP/SMOS/E13 - E13 SMOS lowered to surface to install counterweights | sgp1440smosE13.a0, sgp1smosE13.00, sgp1smosE13.a0, sgp30smosE13.a1, sgpsmosE13.01 |
D020905.3 | SGP/MWR/C1 - IRT not insulated | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
D030312.10 | SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures | sgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
D040318.8 | SGP/SMOS/E13 - 6-month Calibration Checks | sgp1440smosE13.a0, sgp1smosE13.a0, sgp30smosE13.a1 |
D040824.1 | SGP/MWR/C1 - Wet window flag "on" more frequently than expected | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
D080103.2 | SGP/MWR/C1 - Missing data | sgpmwrlosC1.b1 |
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 |
D980507.1 | SGP/MWR/C1 - IRT lens replaced | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
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 |
D981204.1 | SGP/MWR/C1 - Erroneous internal temperature | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
D990106.1 | SGP/MWR/B1/B4/B6/C1 - software change | sgpmwrlosB1.a0, sgpmwrlosB1.a1, sgpmwrlosB4.a0, sgpmwrlosB4.a1, sgpmwrlosB6.a0, sgpmwrlosB6.a1, sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipB1.a0, sgpmwrtipB4.a0, sgpmwrtipB6.a0 |
D990113.1 | SGP/MWR/B1/B4/B5/B6/C1 - software upgrade (version 3.27) | sgpmwrlosB1.a1, sgpmwrlosB4.a1, sgpmwrlosB5.a1, sgpmwrlosB6.a1, sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipB1.a0, sgpmwrtipB4.a0, sgpmwrtipB5.a0, sgpmwrtipB6.a0 |
D990124.2 | SGP/SONDE - Dry bias in sonde RH | DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, 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, sgpsondeptuC1.00, 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 |
D990210.1 | SGP/SONDE - Wrong cal tape | sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
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 |
D991109.11 | SG/SMOS/E13 - E13 SMOS down for tower replacement | sgp1440smosE13.a0, sgp1smosE13.00, sgp1smosE13.a0, sgp30smosE13.a1, sgpsmosE13.01 |
D991109.20 | SGP/SMOS/E13 - E13 SMOS lowered to surface to install counterweights | sgp1440smosE13.a0, sgp1smosE13.00, sgp1smosE13.a0, sgp30smosE13.a1, sgpsmosE13.01 |
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 |
---|---|---|---|
10/19/1999 | 2230 | 11/17/1999 | 2025 |
Subject: | SGP/MWR/C1 - IRT removed |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
Description: | There were no IRT data during this period because MWR #10, upon which the IRT is mounted, was returned to the vendor for upgrades and replaced with spare MWR #33 which does not have the mounting hardware or the electronics to accept the IRT. |
Measurements: | sgpmwrlosC1.b1:
sgpmwrlosC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/24/1999 | 1300 | 09/24/1999 | 1320 |
Subject: | SGP/SMOS/E13 - E13 SMOS lowered to surface to install counterweights |
DataStreams: | sgp1440smosE13.a0, sgp1smosE13.00, sgp1smosE13.a0, sgp30smosE13.a1, sgpsmosE13.01 |
Description: | The E13 SMOS was lowered to the surface on 24 SEP 1999 between 1300 and 1320 GMT while counterweights were installed. All wind speed and direction data are incorrect during this period. |
Measurements: | sgp1440smosE13.a0:
sgp30smosE13.a1:
sgp1smosE13.00:
sgpsmosE13.01:
sgp1smosE13.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/19/1994 | 0000 | 11/27/1998 | 1930 |
Subject: | SGP/MWR/C1 - IRT not insulated |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
Description: | The downwelling IRT was insufficiently insulated to maintain an internal reference temperature above 0 degrees C (P971213.1). Measurements of sky temperature were over-estimated when instrument was below freezing. |
Measurements: | sgpmwrlosC1.b1:
sgpmwrlosC1.a1:
|
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: | sgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
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:
sgpmwrlosC1.b1:
sgp1mwravgC1.c1:
sgpmwrlosC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/17/1994 | 1415 | 06/17/1994 | 1615 |
11/18/1994 | 2000 | 11/18/1994 | 2100 |
05/05/1995 | 1942 | 05/05/1995 | 2030 |
10/06/1995 | 1800 | 10/06/1995 | 1858 |
05/03/1996 | 1850 | 05/03/1996 | 2100 |
11/18/1996 | 2130 | 11/19/1996 | 0030 |
04/20/1997 | 0000 | 04/20/1997 | 2359 |
10/10/1997 | 1515 | 10/10/1997 | 1845 |
05/07/1998 | 2030 | 05/07/1998 | 2115 |
12/04/1998 | 1600 | 12/04/1998 | 1621 |
04/09/1999 | 1730 | 04/09/1999 | 2100 |
10/07/1999 | 1900 | 10/07/1999 | 1945 |
04/20/2000 | 1727 | 04/20/2000 | 1927 |
05/04/2000 | 1844 | 05/04/2000 | 1910 |
10/19/2000 | 1915 | 10/19/2000 | 2020 |
Subject: | SGP/SMOS/E13 - 6-month Calibration Checks |
DataStreams: | sgp1440smosE13.a0, sgp1smosE13.a0, sgp30smosE13.a1 |
Description: | During the time periods specified, the SMOS.E13 tower was lowered for 6-month Calibration Checks. During these times wind data are incorrect and temperature and humidity data may be incorrect. Note, exact times when tower was down or maintenance was being performed is sometimes unknown. Users should use the remaining data from these days with caution. |
Measurements: | sgp1440smosE13.a0:
sgp30smosE13.a1:
sgp1smosE13.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/1999 | 0000 | 12/21/1999 | 2359 |
11/10/2000 | 0000 | 12/08/2000 | 2359 |
01/26/2001 | 0000 | 03/05/2001 | 2359 |
12/18/2001 | 0000 | 12/31/2001 | 2359 |
02/11/2002 | 0000 | 02/28/2002 | 2359 |
02/19/2003 | 0000 | 03/26/2003 | 2359 |
10/15/2003 | 0000 | 11/03/2003 | 2359 |
Subject: | SGP/MWR/C1 - Wet window flag "on" more frequently than expected |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
Description: | The wet window flag was set "on" more frequently than expected during the time periods specified. This indicates the heater has been running more than necessary. In most instances the moisture sensitivity was adjusted at the end of these periods. |
Measurements: | sgpmwrlosC1.b1:
sgpmwrlosC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/21/1993 | 1809 | 07/23/1993 | 1541 |
08/07/1993 | 2143 | 08/09/1993 | 1308 |
08/14/1993 | 2233 | 08/16/1993 | 1300 |
08/29/1993 | 1207 | 08/31/1993 | 1206 |
09/17/1993 | 2158 | 09/20/1993 | 1311 |
10/02/1993 | 1612 | 10/04/1993 | 1338 |
10/09/1993 | 0741 | 10/11/1993 | 1319 |
11/12/1993 | 1207 | 11/15/1993 | 1413 |
11/19/1993 | 2027 | 11/21/1993 | 1957 |
12/14/1993 | 2300 | 03/21/1994 | 1759 |
03/28/1994 | 1459 | 03/30/1994 | 2225 |
05/16/1994 | 1900 | 05/19/1994 | 2018 |
06/22/1994 | 1600 | 07/11/1994 | 1859 |
07/16/1994 | 0300 | 07/19/1994 | 2006 |
09/03/1994 | 1647 | 09/05/1994 | 1341 |
09/09/1994 | 2325 | 09/11/1994 | 1543 |
12/17/1994 | 0049 | 12/19/1994 | 1441 |
01/05/1995 | 0000 | 01/05/1995 | 2359 |
01/28/1995 | 0054 | 01/30/1995 | 1443 |
04/01/1995 | 0000 | 04/03/1995 | 1610 |
05/09/1995 | 2200 | 05/11/1995 | 2350 |
06/24/1995 | 0903 | 06/26/1995 | 0159 |
07/07/1995 | 1625 | 07/10/1995 | 1409 |
07/19/1995 | 1741 | 07/21/1995 | 1906 |
07/28/1995 | 1900 | 07/31/1995 | 1918 |
08/22/1995 | 1616 | 08/25/1995 | 2359 |
12/01/1995 | 1434 | 01/11/1996 | 2214 |
01/12/1996 | 2000 | 01/23/1996 | 2030 |
01/23/1996 | 2332 | 02/08/1996 | 2359 |
08/06/1996 | 0000 | 08/06/1996 | 2359 |
09/04/1996 | 1910 | 09/08/1996 | 2359 |
09/14/1996 | 0700 | 09/16/1996 | 1759 |
09/30/1996 | 0000 | 09/30/1996 | 2359 |
12/01/1996 | 0000 | 12/01/1996 | 2359 |
07/01/1997 | 0000 | 07/01/1997 | 2359 |
02/20/1998 | 2339 | 02/22/1998 | 0042 |
05/04/1998 | 0000 | 05/04/1998 | 2359 |
07/18/1998 | 0337 | 07/20/1998 | 1355 |
09/28/1998 | 0000 | 09/28/1998 | 2359 |
10/10/1998 | 2359 | 10/12/1998 | 1959 |
10/17/1998 | 1705 | 10/19/1998 | 1535 |
12/25/1998 | 2233 | 12/28/1998 | 2026 |
02/06/1999 | 1235 | 02/08/1999 | 1652 |
03/13/1999 | 2048 | 03/15/1999 | 2040 |
07/23/1999 | 2059 | 07/26/1999 | 1408 |
12/04/1999 | 0800 | 12/06/1999 | 1821 |
01/07/2000 | 1446 | 02/02/2000 | 2224 |
05/24/2000 | 1455 | 05/31/2000 | 1505 |
06/06/2000 | 1620 | 06/14/2000 | 1451 |
09/01/2000 | 2200 | 09/05/2000 | 1526 |
09/15/2000 | 2057 | 09/18/2000 | 1339 |
09/23/2000 | 1236 | 09/25/2000 | 1430 |
01/13/2001 | 2011 | 01/16/2001 | 1647 |
02/24/2001 | 0230 | 02/26/2001 | 1508 |
03/03/2001 | 0701 | 03/05/2001 | 1546 |
03/10/2001 | 0702 | 03/12/2001 | 1535 |
03/17/2001 | 0702 | 03/19/2001 | 1422 |
03/24/2001 | 0703 | 03/26/2001 | 1516 |
03/30/2001 | 2038 | 04/02/2001 | 1423 |
05/05/2001 | 1042 | 05/07/2001 | 1514 |
05/18/2001 | 1534 | 05/21/2001 | 1451 |
06/22/2001 | 2200 | 06/25/2001 | 1438 |
06/30/2001 | 0616 | 07/02/2001 | 1435 |
07/28/2001 | 1944 | 07/30/2001 | 1357 |
08/24/2001 | 1348 | 08/27/2001 | 1751 |
09/07/2001 | 1842 | 09/10/2001 | 1439 |
09/15/2001 | 1533 | 09/17/2001 | 1459 |
10/13/2001 | 0033 | 10/15/2001 | 1526 |
11/03/2001 | 0840 | 11/05/2001 | 1613 |
11/10/2001 | 0558 | 11/13/2001 | 1518 |
11/16/2001 | 1701 | 11/19/2001 | 1706 |
12/21/2001 | 2153 | 12/24/2001 | 1442 |
01/30/2002 | 0845 | 02/11/2002 | 1632 |
03/02/2002 | 0339 | 03/04/2002 | 1533 |
03/09/2002 | 0340 | 03/11/2002 | 1621 |
06/26/2002 | 1639 | 06/28/2002 | 2057 |
09/01/2002 | 1002 | 09/03/2002 | 1332 |
12/21/2002 | 1124 | 12/23/2002 | 1510 |
01/04/2003 | 0703 | 01/06/2003 | 1529 |
08/09/2003 | 0037 | 08/11/2003 | 1456 |
08/23/2003 | 2101 | 08/25/2003 | 1456 |
10/12/2003 | 2025 | 10/14/2003 | 1414 |
11/29/2003 | 1840 | 12/01/2003 | 1502 |
01/24/2004 | 0743 | 01/26/2004 | 1505 |
02/14/2004 | 2316 | 02/17/2004 | 1520 |
09/04/2004 | 0250 | 09/07/2004 | 1419 |
10/09/2004 | 0745 | 10/11/2004 | 1739 |
10/16/2004 | 2250 | 10/18/2004 | 1355 |
11/13/2004 | 1849 | 11/15/2004 | 1521 |
12/03/2004 | 1940 | 12/06/2004 | 1454 |
01/15/2005 | 0652 | 01/18/2005 | 1446 |
01/22/2005 | 1449 | 01/24/2005 | 1444 |
06/10/2005 | 2118 | 06/13/2005 | 1603 |
08/05/2005 | 1701 | 08/30/2005 | 2001 |
10/07/2005 | 1658 | 11/16/2005 | 1945 |
11/18/2005 | 1801 | 11/21/2005 | 1521 |
11/23/2005 | 2201 | 11/25/2005 | 1550 |
11/26/2005 | 0101 | 11/28/2005 | 1543 |
12/03/2005 | 1043 | 12/05/2005 | 1559 |
01/14/2006 | 1822 | 01/17/2006 | 1512 |
01/21/2006 | 0708 | 01/23/2006 | 1515 |
02/03/2006 | 1903 | 02/06/2006 | 1533 |
02/25/2006 | 0730 | 02/27/2006 | 1420 |
07/01/2006 | 2225 | 07/03/2006 | 1413 |
11/28/2006 | 2143 | 12/01/2006 | 1911 |
06/09/2007 | 1150 | 06/11/2007 | 1300 |
07/07/2007 | 1642 | 07/09/2007 | 1304 |
08/03/2007 | 1601 | 11/19/2007 | 2135 |
12/22/2007 | 2112 | 12/24/2007 | 1504 |
Subject: | SGP/MWR/C1 - Missing data |
DataStreams: | sgpmwrlosC1.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpmwrlosC1.b1:
|
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 |
---|---|---|---|
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.a0:
sgpsondewrpnC1.a1:
|
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 |
---|---|---|---|
04/01/1998 | 0000 | 04/30/1998 | 2042 |
Subject: | SGP/MWR/C1 - IRT lens replaced |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
Description: | During my recent trip to the SGP I noticed that the IRT was reading too high (about 250 K for clear sky with less than 2 cm PWV). The anti-reflective coating on the lens appeared to have deteriorated significantly. Because I observed no change in the measurements after cleaning the lens, I replaced it with the original lens which had been saved as a spare. The measured sky temperature fell to 232 K, which appeared more reasonable. The next morning I realized that I had forgotten to clean the lens after replacing it. After cleaning the IR temperature fell from 219 to 213 K with about 1.2 cm PWV. This appeared to be in agreement with Martin Platt's radiometer which measures the same passband (10 micrometers.) Upon returning to Ames, I compared the IRT with AERI for April 1998. It appears that at least as far back as 1 April the IRT data are bad. |
Measurements: | sgpmwrlosC1.b1:
sgpmwrlosC1.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.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
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.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
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.a0:
sgpsondewrpnC1.00:
sgpsondewrpnC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/21/1998 | 1900 | 11/12/1998 | 2200 |
Subject: | SGP/MWR/C1 - Erroneous internal temperature |
DataStreams: | sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipC1.a1 |
Description: | After the new internal temperature sensor was installed it was discovered that the scaling resistor was incorrect. (The 24.9 kohm 0.1% resistor had accidently been replaced with a 24.0 kohm resistor when the analog board was repaired by the manufacturer several years ago.) A resistor having the correct value was installed 981112. |
Measurements: | sgpmwrtipC1.a1:
sgpmwrlosC1.b1:
sgpmwrlosC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/03/1995 | 0000 | 10/12/1998 | 1900 |
Subject: | SGP/MWR/B1/B4/B6/C1 - software change |
DataStreams: | sgpmwrlosB1.a0, sgpmwrlosB1.a1, sgpmwrlosB4.a0, sgpmwrlosB4.a1, sgpmwrlosB6.a0, sgpmwrlosB6.a1, sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipB1.a0, sgpmwrtipB4.a0, sgpmwrtipB6.a0 |
Description: | The MWR operating software was changed on 12 October 1998 to provide additional functionality as described below. This change affects the format of the raw and ingested data. NEW FEATURES 1. Faster sampling rate Standard line-of-sight (LOS) observations can now be acquired at 15-second intervals vs. 20-second intervals previously. (The standard LOS cycle is comprised of one sky sample per blackbody sample and gain update.) 2. More flexible sampling strategy Multiple sky observations can be acquired during a LOS cycle, up to 1024 per gain update. This permits sky samples to be acquired at intervals of 2.67 seconds for improved temporal resolution of cloud liquid water variations and better coordination with the millimeter cloud radar during IOPs. 3. Separation of zenith LOS observations from TIP data When the radiometer is in TIP mode, the zenith LOS observations are now extracted, the PWV and LWP computed and reported separately in the output file. This eliminates the periods of missing LOS data during calibration checks/updates. 4. Automatic self-calibration The software now permits the calibration to be updated at specified intervals or continuously. In the first case, LOS mode is automatically changed to TIP mode at user-specified intervals or whenever clear sky conditions occur, the tip data reduced, the calibration updated ,and the radiometer returned to LOS mode without operator intervention. In the second case, the radiometer is continuously is TIP mode until changed by the operator. 5. Graphical user display The graphical display is comprised of a status display, a message display, a temperature plot, a plot of the retrieved PWV and LWP, and (in TIP mode) a plot of the latest tip curves. Editor's Note: The SGP.C1 data were reprocessed in 2004 and enhancement #3 described above was applied to the data prior to Oct 1998. The SGP.BF data are queued for reprocessing as well. |
Measurements: | sgpmwrtipB1.a0:
sgpmwrlosB1.a1:
sgpmwrlosB4.a0:
sgpmwrlosB6.a0:
sgpmwrlosC1.b1:
sgpmwrtipB6.a0:
sgpmwrlosB1.a0:
sgpmwrtipB4.a0:
sgpmwrlosC1.a1:
sgpmwrlosB4.a1:
sgpmwrlosB6.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/21/1993 | 1406 | 01/12/1999 | 2359 |
Subject: | SGP/MWR/B1/B4/B5/B6/C1 - software upgrade (version 3.27) |
DataStreams: | sgpmwrlosB1.a1, sgpmwrlosB4.a1, sgpmwrlosB5.a1, sgpmwrlosB6.a1, sgpmwrlosC1.a1, sgpmwrlosC1.b1, sgpmwrtipB1.a0, sgpmwrtipB4.a0, sgpmwrtipB5.a0, sgpmwrtipB6.a0 |
Description: | At 00:00 GMT on 7 January version 3.27 of the MWR operating program was installed and made operational at the SGP central facility (C1). No problems were noted over the next few days and the boundary facility MWRs (B1, B4, B5, B6) were upgraded at 20:00 GMT on 11 January. This version includes a beam width correction I developed as well as providing the capability to automatically level the elevation mirror (that is, to automatically detect and correct offsets in the elevation angle stepper motor position.) On 12 January I discovered that the '486-based MWR computers at B1, B4 and B6 were not executing the system command to move and rename the data files so that the ARM data system could retrieve them. Reducing the length of the storage arrays in the auto-leveling feature from 1000 to 250 resolved the problem. This results in the auto-leveling being based on only 4 hours of clear sky data rather than 16 hours at B5 and C1. This version of the program is 3.28. Version 3.27 (running at B5 and C1) can be installed if and when these computers are upgraded to Pentium-class machines. The improvement in the quality of the tip curves resulting from the auto-leveling has been dramatic: differences in the brightness temperatures at 3 airmasses (19.5 and 160.5 degrees) have been reduced from +/- 5 K to +/- 0.5 K. The goodness-of-fit coefficient for the tip curves has improved from about 0.995 to over 0.998. In order to take full advantage of this improvement to detect and reject cloudy tip curves, the minimum value of the goodness-of-fit coefficient for a valid tip curve has been increased from 0.995 to 0.998. Editor's Note: The SGP.C1 data were reprocessed in 2004 to produce a common DOD for all time. The 1996-1998 data reprocessing included beam width and mirror-leveling corrections, but the data prior to that range did not have these corrections applied. |
Measurements: | sgpmwrtipB1.a0:
sgpmwrlosB5.a1:
sgpmwrtipB5.a0:
sgpmwrlosB1.a1:
sgpmwrlosC1.b1:
sgpmwrtipB6.a0:
sgpmwrtipB4.a0:
sgpmwrlosC1.a1:
sgpmwrlosB4.a1:
sgpmwrlosB6.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: | DsgpsondeB1.00, DsgpsondeB1.a0, DsgpsondeB1.a1, DsgpsondeB4.00, DsgpsondeB4.a0, DsgpsondeB4.a1, DsgpsondeB5.00, DsgpsondeB5.a0, DsgpsondeB5.a1, DsgpsondeC1.00, DsgpsondeC1.a0, DsgpsondeC1.a1, DsgpsondenogcptucalcB1.c1, DsgpsondenogcptucalcB4.c1, DsgpsondenogcptucalcB5.c1, DsgpsondenogcptucalcC1.c1, DsgpsondenogcwrpnB1.c1, DsgpsondenogcwrpnB4.c1, DsgpsondenogcwrpnB5.c1, DsgpsondenogcwrpnC1.c1, DsgpsondeptuB1.00, DsgpsondeptuB4.00, DsgpsondeptuB5.00, DsgpsondeptuB6.00, DsgpsondeptuC1.00, DsgpsondeptucalcB1.c1, DsgpsondeptucalcB4.c1, DsgpsondeptucalcB5.c1, DsgpsondeptucalcC1.c1, 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, sgpsondeptuC1.00, 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 |
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: | sgpsondewndcalcC1.c1, sgpsondewrpnC1.00, sgpsondewrpnC1.a0, sgpsondewrpnC1.a1 |
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 |
---|---|---|---|
04/14/1999 | 2100 | 05/03/1999 | 2055 |
Subject: | SG/SMOS/E13 - E13 SMOS down for tower replacement |
DataStreams: | sgp1440smosE13.a0, sgp1smosE13.00, sgp1smosE13.a0, sgp30smosE13.a1, sgpsmosE13.01 |
Description: | The E13 SMOS was shut down from 14 APR 1999 at 2100 GMT until 3 MAY 1999 at 2055 GMT while the tower was replaced. |
Measurements: | sgp1440smosE13.a0:
sgp30smosE13.a1:
sgp1smosE13.00:
sgpsmosE13.01:
sgp1smosE13.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/24/1999 | 1300 | 09/24/1999 | 1320 |
Subject: | SGP/SMOS/E13 - E13 SMOS lowered to surface to install counterweights |
DataStreams: | sgp1440smosE13.a0, sgp1smosE13.00, sgp1smosE13.a0, sgp30smosE13.a1, sgpsmosE13.01 |
Description: | The E13 SMOS was lowered to the surface on 24 SEP 1999 between 1300 and 1320 GMT while counterweights were installed. All temperature and humidity data are questionable during this period. |
Measurements: | sgp1440smosE13.a0:
sgp30smosE13.a1:
sgp1smosE13.00:
sgpsmosE13.01:
sgp1smosE13.a0:
|
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:
|