DQR ID | Subject | Data Streams Affected |
---|---|---|
D030909.3 | SGP/MWR/E14 - thermal instability | sgpmwrlosE14.a1, sgpmwrlosE14.b1 |
D040907.1 | SGP/SIRS/C1/E13 - Incorrect calibration coefficients | sgpsirs20sC1.a0, sgpsirs20sE13.a0, sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE13.00, sgpsirsE13.b1 |
D041117.1 | SGP/MWR/E14 - Reprocess: wrong retrievals | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpqmemwrcolE14.c1 |
D050206.3 | SGP/SIRS/E13 - Monthly Report | sgpsirsE13.b1 |
D050601.1 | SGP/SIRS/E13 - Reprocess: incorrect calibrations | sgpsirs20sE13.a0, sgpsirsE13.00, sgpsirsE13.b1 |
D050705.1 | SGP/MWR/E14 - computer problem | sgpmwrE14.00, sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D050725.6 | SGP/MWR/E14 - Reprocess: Revised Retrieval Coefficients | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpqmemwrcolE14.c1 |
D050822.2 | SGP/MWR/E14 - Reprocess: thermal instability | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D051011.3 | SGP/MWR/E14 - New software version (4.15) installed | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D051230.6 | SGP/MFRSR/E13 - Missing data | sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.a0, sgpmfrsrE13.b1 |
D060105.6 | SGP/MFRSR/E13 - Shadowband misalignment | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
D060322.1 | SGP/MWR/E14 - Instrument maintenance | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpmwrE14.00 |
D060505.1 | SGP/MFRSR/E13 - Shadowband misalignment (minor) | sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.a0, sgpmfrsrE13.b1 |
D060630.21 | SGP/SIRS/E13 - Reprocessed: Longwave Calibration error | sgpsirsE13.b1 |
D061207.2 | SGP/MFRSR/E13 - Shadowband misalignment | sgpmfrsrlangleyE13.c1, sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsrlangplotE13.c1 |
D061213.5 | SGP/MWR/E14 - Radiometer testing | sgpmwrE14.00, sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D070206.3 | SGP/MFRSR/E13 - Shadowband misalignment (minor) | sgpmfrsrE13.b1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.a0 |
D070314.2 | SGP/MWR/C1/E14 - Freezing rain-Incorrect rain flag | sgpmwrlosC1.b1, sgpmwrlosE14.b1, sgpmwrtipC1.a1, sgpmwrtipE14.a1 |
D070406.2 | SGP/MWR/E14 - Power supply failure | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D070531.1 | SGP/MFRSR/E13 - Noisy data | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
D070802.4 | SGP/MWR/E14 - Bias in 23.8-GHz measurements | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
D070912.1 | SGP/IRT/E13 - Missing data | sgpirt200msE13.a1, sgpirtE13.b1 |
D080104.1 | SGP/SIRS/E13 - Multiplexer failure | sgpsirs20sE13.a0, sgpsirsE13.b1 |
D080108.2 | SGP/MFRSR/E13 - Shadowband misalignment | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
D080128.1 | SGP/SIRS/C1/E1/E10/E11/E12/E13/E15/E16/E18/E19/E2/E20/E21/E22/E24/E25/E27/E3/E4/E5/E6/E7/E8/E9 - Ice | sgpsirs20sC1.a0, sgpsirs20sE1.a0, sgpsirs20sE10.a0, sgpsirs20sE11.a0, sgpsirs20sE12.a0, sgpsirs20sE13.a0, sgpsirs20sE15.a0, sgpsirs20sE16.a0, sgpsirs20sE18.a0, sgpsirs20sE19.a0, sgpsirs20sE2.a0, sgpsirs20sE20.a0, sgpsirs20sE21.a0, sgpsirs20sE22.a0, sgpsirs20sE24.a0, sgpsirs20sE27.a0, sgpsirs20sE3.a0, sgpsirs20sE4.a0, sgpsirs20sE5.a0, sgpsirs20sE6.a0, sgpsirs20sE7.a0, sgpsirs20sE8.a0, sgpsirs20sE9.a0, sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE10.00, sgpsirsE10.b1, sgpsirsE11.00, sgpsirsE11.b1, sgpsirsE12.00, sgpsirsE12.b1, sgpsirsE13.00, sgpsirsE13.b1, sgpsirsE15.00, sgpsirsE15.b1, sgpsirsE16.00, sgpsirsE16.b1, sgpsirsE18.00, sgpsirsE18.b1, sgpsirsE19.00, sgpsirsE19.b1, sgpsirsE2.00, sgpsirsE2.b1, sgpsirsE20.00, sgpsirsE20.b1, sgpsirsE21.00, sgpsirsE21.b1, sgpsirsE22.00, sgpsirsE22.b1, sgpsirsE24.00, sgpsirsE24.b1, sgpsirsE27.00, sgpsirsE27.b1, sgpsirsE3.00, sgpsirsE3.b1, sgpsirsE4.00, sgpsirsE4.b1, sgpsirsE5.00, sgpsirsE5.b1, sgpsirsE6.00, sgpsirsE6.b1, sgpsirsE7.00, sgpsirsE7.b1, sgpsirsE8.00, sgpsirsE8.b1, sgpsirsE9.00, sgpsirsE9.b1 |
D080131.1 | SGP/IRT/E13 - Reprocess: Sky temperature bias | sgpirt200msE13.a1, sgpirtE13.b1 |
D080304.1 | SGP/MFRSR/E13 - Shadowband misalignment | sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.a0, sgpmfrsrE13.b1 |
D080403.1 | SGP/MFRSR/E13 - Heater controller board failure | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsrlangplotE13.c1, sgpmfrsrlangleyE13.c1 |
D081216.3 | SGP/IRT/E13 - Reprocess: Sensor Calibration | sgpirt200msE13.a1, sgpirtE13.b1 |
D081217.1 | SGP/IRT/E13 - Reprocess: wrong units | sgpirt200msE13.a1, sgpirtE13.b1 |
D091117.3 | SGP/MFRSR/E13 - Heater controller failure | sgpmfrsrE13.b1, sgpmfrsraod1michE13.c1, sgpmfrsrE13.a0, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
D091215.5 | SGP/IRT/E13 - Response time | sgpirt200msE13.a1, sgpirtE13.b1 |
D100115.2 | SGP/MFRSR/E13 - Heater board failure | sgpmfrsrcldod1minE13.c1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.b1, sgpmfrsraod1michE13.c1, sgpmfrsrE13.a0 |
D100224.4 | SGP/MFRSR/E13 - Shadowband Misalignment | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsraod1michE13.c1, sgpmfrsrcldod1minE13.c1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
D101215.3 | SGP/IRT/E13 - Instrument output invalid | sgpirt200msE13.a1, sgpirtE13.b1 |
D110513.5 | SGP/MFRSR/E13 - Heater board failure | sgpmfrsraod1michE13.c1, sgpmfrsrcldod1minE13.c1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.b1, sgpmfrsrE13.a0 |
D110607.2 | SGP/MFRSR/E13 - Shading Problem | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsraod1michE13.c1, sgpmfrsrcldod1minE13.c1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
D110715.2 | SGP/MFRSR/E13 - Shadowband misalignment | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsraod1michE13.c1, sgpmfrsrcldod1minE13.c1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
D110725.2 | SGP/SIRS/E13 - NIP damaged by lightning strike | sgpsirs20sE13.a0, sgpsirsE13.b1 |
D111115.3 | SGP/SIRS/E13 - Intermittent upwelling longwave | sgpsirs20sE13.a0, sgpsirsE13.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/11/2003 | 0000 | 08/28/2003 | 2359 |
Subject: | SGP/MWR/E14 - thermal instability |
DataStreams: | sgpmwrlosE14.a1, sgpmwrlosE14.b1 |
Description: | During periods of high ambient temperature, the instrument may have been thermally unstable. |
Measurements: | sgpmwrlosE14.b1:
sgpmwrlosE14.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/27/2004 | 1830 | 09/07/2004 | 2130 |
Subject: | SGP/SIRS/C1/E13 - Incorrect calibration coefficients |
DataStreams: | sgpsirs20sC1.a0, sgpsirs20sE13.a0, sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE13.00, sgpsirsE13.b1 |
Description: | After the DIR changeout on 8/27, the DLH measurements at the central facility vary significantly between pyrgeometers by as much as 65 Wm^(-2). It was discovered that the two downwelling pyrgeometers destined for C1 and E13 may have been swapped during installation. The instrument mentor is unsure of applied calibration coefficients during this DQR's time period. Backing out new downwelling longwave irradiances would be difficult in this case. Fortunately, the problem period is less than a fortnight. |
Measurements: | sgpsirs20sC1.a0:
sgpsirsC1.00:
sgpsirs20sE13.a0:
sgpsirsE13.00:
sgpsirsE13.b1:
sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/24/2004 | 1945 | 11/11/2004 | 2000 |
Subject: | SGP/MWR/E14 - Reprocess: wrong retrievals |
DataStreams: | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpqmemwrcolE14.c1 |
Description: | When MWR#04 was installed at EF14 (replacing MWR#33), out-of-date retrieval coefficients were used in the configuration file. The correct coefficients were applied when the computer, software, and configuration file were upgraded. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
sgpmwrlosE14.a1:
sgpqmemwrcolE14.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/2004 | 0000 | 01/01/2005 | 0000 |
Subject: | SGP/SIRS/E13 - Monthly Report |
DataStreams: | sgpsirsE13.b1 |
Description: | :Data quality this site-month is good. The offset for the Global PSP is about -7 W/m^2. The dominant problem here is the daytime 3 component problem. Direct and Diffuse are always too high and Global is too low. The problem occurs around the time that the testing regime switches from twilight to daytime testing regimes or from daytime to twilight. The flags occur in significant numbers on the 1st - 5th, 7th - 20th, 24th - 28th, 30th, and 31st. The failures vary in magnitude and duration. The worst flags for a particular respect to this problem. Global goes below daytime empirical limits on both the 5th and 6th for substantial periods of time. Diffuse also goes below daytime empirical limits on the 6th in the afternoon. Upwelling Longwave is below empirical limits on the 24th. This may not be a problem, as many sites exhibited the same problem on the same night. Exceptionally cold temperatures may be the cause. |
Measurements: | sgpsirsE13.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/25/2005 | 1409 | 06/02/2005 | 2205 |
Subject: | SGP/SIRS/E13 - Reprocess: incorrect calibrations |
DataStreams: | sgpsirs20sE13.a0, sgpsirsE13.00, sgpsirsE13.b1 |
Description: | After a long data gap on 5/25/2005, presumably a power outage, the following datastreams were showing incorrect values as well as incorrect calibration coefficients in the datalogger program: down_long_hemisp_shaded (downwelling PIR instrument) up_long_hemisp (upwelling PIR instrument) short_direct_normal (NIP instrument) The SIRS.E13 datalogger was power cycled (6/2/2005 2200GMT) and the correct program loaded into the SIRS datalogger and storage module. The data during this time range can be recalibrated as follows: First divide value by incorrectly applied cal coeff (first number) then multiply by correct cal coeff (second number) short_direct_normal 120.28 124.58 up_long_netir 0.2386 0.2595 down_long_netir 0.3052 0.2304 Reapply cal coeffs below using up_long_netIR(uV), inst_up_long_dome_temp(K), inst_up_long_dome_temp(K) using procedure described in SIRS instrument manual. up_long_hemisp k0 -18.3400 W/m^2\n, k1 0.2595 W/(m^2*uV)\n, k2 1.0380 unitless\n, k3 -2.7420 unitless\n, kr 0.0007044 K/uV\n, Reapply cal coeffs below using down_long_netIR(uV),inst_down_long_dome_temp (K),inst_down_long_dome_temp(K). down_long_hemisp_shaded k0 -11.6300 W/m^2\n, k1 0.2304 W/(m^2*uV)\n, k2 1.0190 unitless\n, k3 -2.4230 unitless\n, kr 0.0007044 K/uV\n, |
Measurements: | sgpsirs20sE13.a0:
sgpsirsE13.00:
sgpsirsE13.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/29/2005 | 0000 | 08/09/2005 | 1847 |
Subject: | SGP/MWR/E14 - computer problem |
DataStreams: | sgpmwrE14.00, sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | The computer was operating sporadically, requiring frequent reboots and resulting in periods of missing data. A warranty replacement of the motherboard corrected the problem. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrE14.00:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/16/2002 | 0000 | 06/28/2005 | 2300 |
Subject: | SGP/MWR/E14 - Reprocess: Revised Retrieval Coefficients |
DataStreams: | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpqmemwrcolE14.c1 |
Description: | IN THE BEGINNING (June 1992), the retrieval coefficients used to derive the precipitable water vapor (PWV) and liquid water path (LWP) from the MWR brightness temperatures were based on the Liebe and Layton (1987) water vapor and oxygen absorption model and the Grant (1957) liquid water absorption model. Following the SHEBA experience, revised retrievals based on the more recent Rosenkranz (1998) water vapor and oxygen absorption models and the Liebe (1991) liquid waer absorption model were developed. The Rosenkranz water vapor absorption model resulted a 2 percent increase in PWV relative to the earlier Liebe and Layton model. The Liebe liquid water absorption model decreased the LWP by 10% relative to the Grant model. However, the increased oxygen absorption caused a 0.02-0.03 mm (20-30 g/m2) reduction in LWP, which was particularly significant for low LWP conditions (i.e. thin clouds encountered at SHEBA). Recently, it has been shown (Liljegren, Boukabara, Cady-Pereira, and Clough, TGARS v. 43, pp 1102-1108, 2005) that the half-width of the 22 GHz water vapor line from the HITRAN compilation, which is 5 percent smaller than the Liebe and Dillon (1969) half-width used in Rosenkranz (1998), provided a better fit to the microwave brightness temperature measurements at 5 frequencies in the range 22-30 GHz, and yielded more accurate retrievals. Accordingly, revised MWR retrieval coefficients have been developed using MONORTM, which utilizes the HITRAN compilation for its spectroscopic parameters. These new retrievals provide 3 percent less PWV and 2.6 percent greater LWP than the previous retrievals based on Rosenkranz (1998). Although the MWR data will be reprocessed to apply the new monortm-based retrievals, for most purposes it will be sufficient to correct the data using the following factors: PWV_MONORTM = 0.9695 * PWV_ROSENKRANZ LWP_MONORTM = 1.026 * LWP_ROSENKRANZ The Rosenkranz-based retrieval coefficients became active at SGP.E14 20020416.0000. The MONORTM-based retrieval coefficients became active at SGP.E14 20050628.2300. Note: a reprocessing effort is already underway to apply the Rosenkranz-based retrieval coefficients to all MWR prior to April 2002. An additional reprocessing task will be undertaken to apply the MONORTM retrieval to all MWR data when the first is completed. Read reprocessing comments in the netcdf file header carefully to ensure you are aware which retrieval is in play. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
sgpmwrlosE14.a1:
sgpqmemwrcolE14.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/01/2005 | 1828 | 08/02/2005 | 2002 |
Subject: | SGP/MWR/E14 - Reprocess: thermal instability |
DataStreams: | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | During periods of high ambient temperature, the instrument may have been thermally unstable. The problem was corrected by increasing the RF deck temperature from 50 to 56 C. The data will need to be reprocessed with calibration coefficients derived after the reference temperature, tkmx, was adjusted. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/01/2002 | 1458 | 08/01/2005 | 2306 |
Subject: | SGP/MWR/E14 - New software version (4.15) installed |
DataStreams: | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | A problem began with the installation of MWR.EXE version 4.12 in May 2002. The software had been upgraded from a "DOS" to a "Windows"-compiled program to address an earlier problem. The software upgrade corrected the earlier problem but introduced a new one that caused line-of-sight observing cycles to be skipped, a 15% reduction in the number of tip curves, and saturation of CPU usage. Software versions 4.13 and 4.14 also produced these problems. The new MWR software, version 4.15, was installed on 8/1/2005. As a consequence of this upgrade, the tip curve frequency increased. The tip cycle time decreased from ~60s to ~50s. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/16/2007 | 1843 | 03/18/2007 | 1930 |
02/15/2007 | 0407 | 02/17/2007 | 1232 |
07/15/2006 | 1108 | 07/17/2006 | 1408 |
02/08/2007 | 1508 | 02/11/2007 | 1228 |
02/17/2006 | 2007 | 02/21/2006 | 1608 |
01/06/2006 | 1707 | 01/09/2006 | 1608 |
11/11/2005 | 0508 | 11/14/2005 | 2008 |
07/23/2004 | 2107 | 07/26/2004 | 1408 |
05/23/2003 | 1708 | 05/27/2003 | 1408 |
03/09/2002 | 2007 | 03/12/2002 | 0708 |
08/18/2001 | 0008 | 08/21/2001 | 1708 |
01/30/2002 | 1808 | 02/11/2002 | 1509 |
03/14/1999 | 0019 | 03/16/1999 | 0321 |
12/25/1998 | 2112 | 12/28/1998 | 1547 |
10/31/1998 | 1112 | 11/03/1998 | 1934 |
05/02/1998 | 0036 | 05/04/1998 | 2210 |
Subject: | SGP/MFRSR/E13 - Missing data |
DataStreams: | sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.a0, sgpmfrsrE13.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/22/2005 | 1445 | 12/29/2005 | 1700 |
Subject: | SGP/MFRSR/E13 - Shadowband misalignment |
DataStreams: | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
Description: | Shading problem first evident on the 22nd. Overcast conditions during the previous week. The mostly clear day on 12/15/2005 shows no evidence of a shading problem. During this period do not use diffuse or direct data between 1430 and 1900 UTC. Maintenance on 12/29/2005 resolved this issue. |
Measurements: | sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/07/2006 | 2200 | 03/29/2006 | 2100 |
Subject: | SGP/MWR/E14 - Instrument maintenance |
DataStreams: | sgpmwrlosE14.a1, sgpmwrlosE14.b1, sgpmwrtipE14.a1, sgpmwrE14.00 |
Description: | The MWR teflon cover was replaced with an old one that is not hydrophobic. This affected the measurements during and immediately after rain. A new teflon window was placed on 3/29 |
Measurements: | sgpmwrtipE14.a1:
sgpmwrE14.00:
sgpmwrlosE14.b1:
sgpmwrlosE14.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/05/2006 | 1800 | 01/11/2006 | 1930 |
Subject: | SGP/MFRSR/E13 - Shadowband misalignment (minor) |
DataStreams: | sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.a0, sgpmfrsrE13.b1 |
Description: | A slight shading problem between the hours of 1800 and 2300 UTC. Avoid direct and diffuse data during this period. |
Measurements: | sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/11/2003 | 1935 | 02/16/2006 | 1905 |
Subject: | SGP/SIRS/E13 - Reprocessed: Longwave Calibration error |
DataStreams: | sgpsirsE13.b1 |
Description: | Modified pyrgeometer calibration procedures were implemented beginning in December 2003. These modified procedures introduced a calibration bias in the longwave data. The previous procedures were re-implemented at all sites between December 2005 and February 2006 to restore proper calibrations. The data collected while the incorrect procedures were in place have been reprocessed to remove the calibration bias. The reprocessed 60 second averaged data are based on 3 instantaneous 20 second data records rather than on 60 1 second instantaneous data records. Still, these data are considered far superior to the originally processed data. The reprocessed data were archived in October 2006. |
Measurements: | sgpsirsE13.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/01/2006 | 1300 | 12/04/2006 | 1900 |
Subject: | SGP/MFRSR/E13 - Shadowband misalignment |
DataStreams: | sgpmfrsrlangleyE13.c1, sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsrlangplotE13.c1 |
Description: | The shadowband was not shading the diffuser at all from the 1st until maintenance resolved the problem on 12/4 just before 1900 UTC. |
Measurements: | sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/28/2006 | 2100 | 12/01/2006 | 1900 |
Subject: | SGP/MWR/E14 - Radiometer testing |
DataStreams: | sgpmwrE14.00, sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | The radiometer was removed and taken inside for testing |
Measurements: | sgpmwrtipE14.a1:
sgpmwrE14.00:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/26/2007 | 1430 | 01/28/2007 | 1830 |
Subject: | SGP/MFRSR/E13 - Shadowband misalignment (minor) |
DataStreams: | sgpmfrsrE13.b1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.a0 |
Description: | There is a slight shading issue between 1430 and 1830 on the days covered by this DQR. It is a very slight problem, if it is really a shading issue. It is difficult to say with 100% certainty as it stopped without documented maintenance. |
Measurements: | sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/12/2007 | 0000 | 01/15/2007 | 0000 |
Subject: | SGP/MWR/C1/E14 - Freezing rain-Incorrect rain flag |
DataStreams: | sgpmwrlosC1.b1, sgpmwrlosE14.b1, sgpmwrtipC1.a1, sgpmwrtipE14.a1 |
Description: | Between 01/12 and 01/15 brightness temperatures show high values (Tb > 100 K) indicative of rain, however the wet_window flag is 0 (indicative of no rain). During that time there where freezing conditions with ice pellets that were not detected by the sensor. The high brightness temperatures may be due to melting ice on the window. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrtipC1.a1:
sgpmwrlosE14.b1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/20/2007 | 0400 | 06/05/2007 | 2000 |
Subject: | SGP/MWR/E14 - Power supply failure |
DataStreams: | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | On 3/20 the instrument suffered a power supply failure and was removed for repairs |
Measurements: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/08/2007 | 1500 | 03/18/2007 | 1900 |
Subject: | SGP/MFRSR/E13 - Noisy data |
DataStreams: | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
Description: | A refurbished head and Campbell logging system were installed at this site on Feb 2. An incorrect program was loaded into the logger resulting in very noisy data until the correct program was loaded on March 18. Avoid data during this period. |
Measurements: | sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/05/2007 | 2000 | 04/26/2009 | 0830 |
Subject: | SGP/MWR/E14 - Bias in 23.8-GHz measurements |
DataStreams: | sgpmwrlosE14.b1, sgpmwrtipE14.a1 |
Description: | Since the instrument was returned after a power supply failure the 23.8-GHz channel is constantly 3 K higher than the other co-located radiometer (C1). Since the instrument was just returned after extensive refurbishing at the manufacturer the cause of the bias is not clear. |
Measurements: | sgpmwrtipE14.a1:
sgpmwrlosE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/11/2007 | 0001 | 09/19/2007 | 1410 |
09/20/2007 | 0151 | 10/10/2007 | 2118 |
02/13/2008 | 2040 | 02/22/2008 | 1815 |
03/02/2008 | 0430 | 03/07/2008 | 1736 |
03/09/2008 | 2200 | 05/02/2008 | 2209 |
05/03/2008 | 1756 | 05/27/2008 | 1148 |
05/27/2008 | 1732 | 08/04/2008 | 0708 |
08/04/2008 | 1400 | 10/16/2008 | 2018 |
10/11/2007 | 0156 | 10/31/2007 | 1852 |
12/22/2007 | 1848 | 12/26/2007 | 2006 |
01/07/2008 | 0000 | 01/10/2008 | 1430 |
01/28/2008 | 1857 | 01/30/2008 | 1631 |
02/09/2008 | 2002 | 02/13/2008 | 1414 |
07/25/2007 | 2200 | 07/27/2007 | 1457 |
08/29/2007 | 1328 | 09/06/2007 | 2000 |
09/08/2007 | 0700 | 09/10/2007 | 1937 |
Subject: | SGP/IRT/E13 - Missing data |
DataStreams: | sgpirt200msE13.a1, sgpirtE13.b1 |
Description: | Data are missing and unrecoverable. |
Measurements: | sgpirtE13.b1:
sgpirt200msE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/27/2007 | 1900 | 01/07/2008 | 1525 |
Subject: | SGP/SIRS/E13 - Multiplexer failure |
DataStreams: | sgpsirs20sE13.a0, sgpsirsE13.b1 |
Description: | The down_short_hemisp (PSP), down_long_hemisp_shaded (DIR) and up_long_hemisp (UIR) experienced frequent dropouts due to a failing multiplexer. CM replaced mux on 1/7. |
Measurements: | sgpsirs20sE13.a0:
sgpsirsE13.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/16/2007 | 1300 | 12/18/2007 | 2000 |
12/22/2007 | 0000 | 12/28/2007 | 1630 |
12/28/2007 | 1630 | 01/09/2008 | 2359 |
Subject: | SGP/MFRSR/E13 - Shadowband misalignment |
DataStreams: | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
Description: | Massive shading issue on 12/16 through 12/18. It was obviously found and resolved on 12/18. On 12/22 it looks like the shadowband stops functioning altogether. (It is likely it slipped on the motor shaft.) It continues like this until 12/28 @ 1630 when an attempt was made fix the problem. This was somewhat successful, but there is still a shading problem in the afternoon between 1730 and 2300 until 01/09/2008. Some data from 12/28/2007 - 01/09/2008 will be OK. Don't use data between the hours 1730 and 2300. Avoid data from other dates described in this DQR. |
Measurements: | sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/10/2007 | 0000 | 12/25/2007 | 2359 |
Subject: |
|
DataStreams: | sgpsirs20sC1.a0, sgpsirs20sE1.a0, sgpsirs20sE10.a0, sgpsirs20sE11.a0, sgpsirs20sE12.a0, sgpsirs20sE13.a0, sgpsirs20sE15.a0, sgpsirs20sE16.a0, sgpsirs20sE18.a0, sgpsirs20sE19.a0, sgpsirs20sE2.a0, sgpsirs20sE20.a0, sgpsirs20sE21.a0, sgpsirs20sE22.a0, sgpsirs20sE24.a0, sgpsirs20sE27.a0, sgpsirs20sE3.a0, sgpsirs20sE4.a0, sgpsirs20sE5.a0, sgpsirs20sE6.a0, sgpsirs20sE7.a0, sgpsirs20sE8.a0, sgpsirs20sE9.a0, sgpsirsC1.00, sgpsirsC1.b1, sgpsirsE1.00, sgpsirsE1.b1, sgpsirsE10.00, sgpsirsE10.b1, sgpsirsE11.00, sgpsirsE11.b1, sgpsirsE12.00, sgpsirsE12.b1, sgpsirsE13.00, sgpsirsE13.b1, sgpsirsE15.00, sgpsirsE15.b1, sgpsirsE16.00, sgpsirsE16.b1, sgpsirsE18.00, sgpsirsE18.b1, sgpsirsE19.00, sgpsirsE19.b1, sgpsirsE2.00, sgpsirsE2.b1, sgpsirsE20.00, sgpsirsE20.b1, sgpsirsE21.00, sgpsirsE21.b1, sgpsirsE22.00, sgpsirsE22.b1, sgpsirsE24.00, sgpsirsE24.b1, sgpsirsE27.00, sgpsirsE27.b1, sgpsirsE3.00, sgpsirsE3.b1, sgpsirsE4.00, sgpsirsE4.b1, sgpsirsE5.00, sgpsirsE5.b1, sgpsirsE6.00, sgpsirsE6.b1, sgpsirsE7.00, sgpsirsE7.b1, sgpsirsE8.00, sgpsirsE8.b1, sgpsirsE9.00, sgpsirsE9.b1 |
Description: | Ice storms affected the SGP central and extended facilities starting Dec 10 0000GMT to mid/late December. Each facility was affected at various times and degrees dependant on elevation, latitude and whether power failed for short or extended periods of time. By December 15th most ice had melted from the radiometers at all the faclities but power outages and tracker failures persisted at some stations. |
Measurements: | sgpsirsE16.b1:
sgpsirs20sE4.a0:
sgpsirs20sE21.a0:
sgpsirs20sE27.a0:
sgpsirs20sE1.a0:
sgpsirsE2.b1:
sgpsirsE12.00:
sgpsirs20sE11.a0:
sgpsirsE4.00:
sgpsirsE22.b1:
sgpsirs20sE12.a0:
sgpsirsE11.b1:
sgpsirsE11.00:
sgpsirsE21.00:
sgpsirsE10.00:
sgpsirs20sE3.a0:
sgpsirsE3.00:
sgpsirsE6.00:
sgpsirsE15.00:
sgpsirsE13.00:
sgpsirsE9.b1:
sgpsirsE1.b1:
sgpsirs20sE10.a0:
sgpsirs20sE15.a0:
sgpsirsE27.b1:
sgpsirsE24.b1:
sgpsirsE21.b1:
sgpsirsE19.b1:
sgpsirsC1.b1:
sgpsirs20sC1.a0:
sgpsirsC1.00:
sgpsirs20sE7.a0:
sgpsirs20sE5.a0:
sgpsirsE7.00:
sgpsirsE13.b1:
sgpsirs20sE22.a0:
sgpsirsE1.00:
sgpsirsE22.00:
sgpsirsE8.b1:
sgpsirsE24.00:
sgpsirsE10.b1:
sgpsirs20sE9.a0:
sgpsirs20sE19.a0:
sgpsirsE3.b1:
sgpsirsE2.00:
sgpsirs20sE6.a0:
sgpsirs20sE20.a0:
sgpsirs20sE24.a0:
sgpsirs20sE13.a0:
sgpsirsE20.00:
sgpsirsE19.00:
sgpsirsE6.b1:
sgpsirsE27.00:
sgpsirsE7.b1:
sgpsirsE18.b1:
sgpsirsE18.00:
sgpsirsE9.00:
sgpsirsE16.00:
sgpsirs20sE8.a0:
sgpsirsE12.b1:
sgpsirs20sE18.a0:
sgpsirs20sE2.a0:
sgpsirsE15.b1:
sgpsirsE8.00:
sgpsirsE20.b1:
sgpsirs20sE16.a0:
sgpsirsE5.b1:
sgpsirsE5.00:
sgpsirsE4.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/11/2006 | 0000 | 07/25/2007 | 2315 |
Subject: | SGP/IRT/E13 - Reprocess: Sky temperature bias |
DataStreams: | sgpirt200msE13.a1, sgpirtE13.b1 |
Description: | Measurements of sky temperature, especially those <250K,, were positively biased compared with AERI because there was no compensation for the effect of the emissivity and temperature of the gold mirror. The problem was corrected by changing the IRT emissivity from 1.000 to 0.987, adding an RTD and transmitter electronics to measure the temperature of the mirror, and changing the ambient temperature measurement for internal reference to external mirror temperature. Use sky temperature measurements less than 230K with caution. Biases as large as 30K have been observed when the actual temperature, as measured by AERI, is less than 210 K. |
Measurements: | sgpirtE13.b1:
sgpirt200msE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/16/2007 | 1330 | 12/18/2007 | 2000 |
12/30/2007 | 1730 | 01/09/2008 | 2359 |
02/06/2008 | 1600 | 02/06/2008 | 1900 |
02/24/2008 | 1300 | 02/25/2008 | 1845 |
Subject: | SGP/MFRSR/E13 - Shadowband misalignment |
DataStreams: | sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.a0, sgpmfrsrE13.b1 |
Description: | Between 20071216 and 20080225 there are four stretches where the instrument is not shading properly. Those periods have been accurately designated in this DQR. Data outside these ranges are OK. Avoid using this instrument during times covered by this DQR. The hemispheric data may be OK, but with other good choices (C1 MFRSR and NIMFR), it is suggested to just avoid E13. |
Measurements: | sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/31/2008 | 0730 | 04/03/2008 | 1800 |
Subject: | SGP/MFRSR/E13 - Heater controller board failure |
DataStreams: | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsrlangplotE13.c1, sgpmfrsrlangleyE13.c1 |
Description: | The heater controller board failed allowing the instrument head temperature to climb too high. The higher head temperatures affected the data. Do not use data covered by this DQR. |
Measurements: | sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/20/2008 | 1607 | 02/12/2009 | 2140 |
Subject: | SGP/IRT/E13 - Reprocess: Sensor Calibration |
DataStreams: | sgpirt200msE13.a1, sgpirtE13.b1 |
Description: | The measurements are greater than AERI, especially when sky temperature is less than -40C. The lens and mirror was cleaned on 11/21/2008 and the mirror was replaced on 1/28/2009 but these actions did not correct the problem. It was learned that the internal calibration factor was not changed by the manufacturer after the unit was repaired and recalibrated on 9/6/2007. The calibration factor was corrected from 1.2172 to 1.4100 on 2/12/2009. |
Measurements: | sgpirtE13.b1:
sgpirt200msE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/12/2008 | 2110 | 10/27/2008 | 2030 |
Subject: | SGP/IRT/E13 - Reprocess: wrong units |
DataStreams: | sgpirt200msE13.a1, sgpirtE13.b1 |
Description: | While diagnosing serial communication problems, the IRT configuration was reset to factory defaults so the temperature unit parameter was set to C instead of K. |
Measurements: | sgpirtE13.b1:
sgpirt200msE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/16/2009 | 0114 | 11/18/2009 | 1520 |
Subject: | SGP/MFRSR/E13 - Heater controller failure |
DataStreams: | sgpmfrsrE13.b1, sgpmfrsraod1michE13.c1, sgpmfrsrE13.a0, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
Description: | The heater board failed. A replacement board was installed on 20091118. The mentor recommends avoiding data while the heater is not functioning. |
Measurements: | sgpmfrsraod1michE13.c1:
sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/11/2006 | 0000 | 03/17/2006 | 2359 |
Subject: | SGP/IRT/E13 - Response time |
DataStreams: | sgpirt200msE13.a1, sgpirtE13.b1 |
Description: | The time response of the temperature measurement was changed from 1.0 to 0.1 sec to accommodate the 5Hz sample rate. This caused a 370% decrease in the resolution (to 1.85C at a sky temperature of -50C) and a significant decrease in the signal-to-noise ratio. |
Measurements: | sgpirtE13.b1:
sgpirt200msE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/07/2010 | 0350 | 01/08/2010 | 1900 |
Subject: | SGP/MFRSR/E13 - Heater board failure |
DataStreams: | sgpmfrsrcldod1minE13.c1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.b1, sgpmfrsraod1michE13.c1, sgpmfrsrE13.a0 |
Description: | The heater controller board failed on 20100107 and was replaced on 20100108. Do not use data while the heater controller was not functioning. |
Measurements: | sgpmfrsraod1michE13.c1:
sgpmfrsrE13.a0:
sgpmfrsrlangplotE13.c1:
sgpmfrsrE13.b1:
sgpmfrsrcldod1minE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/30/2010 | 2000 | 02/02/2010 | 2359 |
Subject: | SGP/MFRSR/E13 - Shadowband Misalignment |
DataStreams: | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsraod1michE13.c1, sgpmfrsrcldod1minE13.c1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
Description: | It looks like poor weather may have caused the shadowband to slip slightly. The only affected days are 1/30 and 2/2. The days between, before, and after are all overcast. The first clear day after 2/2 is 2/9 when the problem is not evident. Affected data are from 1800 - sunset. |
Measurements: | sgpmfrsraod1michE13.c1:
sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrcldod1minE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/09/2010 | 1534 | 10/04/2010 | 1445 |
Subject: | SGP/IRT/E13 - Instrument output invalid |
DataStreams: | sgpirt200msE13.a1, sgpirtE13.b1 |
Description: | The signal was missing for 25 min and then changed to a constant values of sky_ir_temp=262.22K and ref_ir_temp=313.10K. The problem was corrected when the intrument was power-cycled. |
Measurements: | sgpirtE13.b1:
sgpirt200msE13.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/03/2011 | 0948 | 03/22/2011 | 2023 |
Subject: | SGP/MFRSR/E13 - Heater board failure |
DataStreams: | sgpmfrsraod1michE13.c1, sgpmfrsrcldod1minE13.c1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1, sgpmfrsrE13.b1, sgpmfrsrE13.a0 |
Description: | The heater board failed. Do not use data from the instrument while the heater board was not functioning. |
Measurements: | sgpmfrsraod1michE13.c1:
sgpmfrsrE13.a0:
sgpmfrsrlangplotE13.c1:
sgpmfrsrE13.b1:
sgpmfrsrcldod1minE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/01/2011 | 1500 | 01/13/2011 | 1930 |
Subject: | SGP/MFRSR/E13 - Shading Problem |
DataStreams: | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsraod1michE13.c1, sgpmfrsrcldod1minE13.c1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
Description: | A very minor shading issue was first noticeable on 20110101, affecting data between 1530 UTC and 1930 UTC. The last day it was conclusively observed was 20110113. Subsequent days were cloudy, so we can't say for sure when it stopped. |
Measurements: | sgpmfrsraod1michE13.c1:
sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrcldod1minE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/02/2011 | 1930 | 06/07/2011 | 1950 |
Subject: | SGP/MFRSR/E13 - Shadowband misalignment |
DataStreams: | sgpmfrsrE13.a0, sgpmfrsrE13.b1, sgpmfrsraod1michE13.c1, sgpmfrsrcldod1minE13.c1, sgpmfrsrlangleyE13.c1, sgpmfrsrlangplotE13.c1 |
Description: | There was a shading problem affecting the data between 1930 UTC and sunset. |
Measurements: | sgpmfrsraod1michE13.c1:
sgpmfrsrE13.a0:
sgpmfrsrE13.b1:
sgpmfrsrlangplotE13.c1:
sgpmfrsrcldod1minE13.c1:
sgpmfrsrlangleyE13.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/12/2011 | 0539 | 06/14/2011 | 1556 |
Subject: | SGP/SIRS/E13 - NIP damaged by lightning strike |
DataStreams: | sgpsirs20sE13.a0, sgpsirsE13.b1 |
Description: | Apparent lightning strike in the instrument cluster area resulted in a failed NIP. The SIRS was due for calibration change outs so the US, DS, DD and NIP were replaced. The updated program was loaded at approximately 1730 GMT. An estimate of direct normal values can be derived using the following formula: short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle) |
Measurements: | sgpsirs20sE13.a0:
sgpsirsE13.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/19/2011 | 1512 | 10/27/2011 | 1559 |
Subject: | SGP/SIRS/E13 - Intermittent upwelling longwave |
DataStreams: | sgpsirs20sE13.a0, sgpsirsE13.b1 |
Description: | Beginning 9/19/2011 @ 15:12, the upwelling longwave values are often spiking to large and small values throughout the day. A multiplexer was found to be the problem and the ops replaced it on 10/27/2011. Incorrect data are not recoverable for the specified time range. However, good data exists within the time range. The SGPQCRAD VAP data stream provides flags for "good" data and appears to accurately flag bad data during this time range. Users are advised to use this data stream to screen for correct up_long_hemisp values. |
Measurements: | sgpsirs20sE13.a0:
sgpsirsE13.b1:
|