DQR ID | Subject | Data Streams Affected |
---|---|---|
D100128.1 | SGP/SIRS/E7 - Upwelling Longwave inconsistent | sgpsirsE7.b1, sgpsirs20sE7.a0 |
D100218.1 | SGP/MET/E21 - Wind Sensor Inoperative Due to Ice | sgpmetE21.b1 |
D100303.2 | SGP/MET/E4 - Wind sensor frozen | sgpmetE4.b1 |
D100325.1 | SGP/SIRS/E9 - Downwelling SW sensor alignment/level | sgpsirsE9.b1, sgpsirs20sE9.a0 |
D100521.3 | SGP/SIRS/E21 - Tracker failure | sgpsirsE21.b1, sgpsirs20sE21.a0 |
D100614.3 | SGP/SIRS/E11 - Multiplexer problem | sgpsirsE11.b1, sgpsirs20sE11.a0 |
D100616.1 | SGP/SIRS/E6 - Datalogger failure | sgpsirsE6.b1, sgpsirs20sE6.a0 |
D100628.1 | SGP/SIRS/E11 - Intake Fan Failure | sgpsirsE11.b1, sgpsirs20sE11.a0 |
D100628.2 | SGP/SIRS/E9 - TimeCheck Error | sgpsirsE9.b1, sgpsirs20sE9.a0 |
D100629.1 | SGP/MET/E20 - Rain Gauge Cable Chewed by Rodents | sgpmetE20.b1 |
D100713.1 | SGP/SIRS/E6 - Incorrect upwelling longwave hemisp | sgpsirsE6.b1, sgpsirs20sE6.a0 |
D100811.1 | SGP/SIRS/E7 - NIP connector failure | sgpsirsE7.b1, sgpsirs20sE7.a0 |
D100921.1 | SGP/SIRS/E6 - Multiplexer problem | sgpsirsE6.b1, sgpsirs20sE6.a0 |
D101103.3 | SGP/SIRS/E21 - Reprocessing: TimeCheck Error | sgpsirsE21.00, sgpsirsE21.b1, sgpsirs20sE21.a0 |
D101203.1 | SGP/SIRS/E11 - Reprocess: Incorrect calibration coefficients | sgpsirsE11.b1, sgpsirs20sE11.a0 |
D110105.2 | SGP/MET/E11 - Intermittent incorrect windspeed | sgpmetE11.b1 |
D110419.1 | SGP/MET/E13 - Missing PWD data | sgpmetE13.b1 |
D110524.2 | SGP/MET/E21 - TimeCheck Error | sgpmetE21.b1 |
D110524.3 | SGP/MET/E9 - TimeCheck Error | sgpmetE9.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/23/2009 | 1600 | 01/27/2010 | 1510 |
Subject: | SGP/SIRS/E7 - Upwelling Longwave inconsistent |
DataStreams: | sgpsirsE7.b1, sgpsirs20sE7.a0 |
Description: | The upwelling IR PIR instrument (up_long_hemisp) had bad connections during this time period. The case thermistor (Mux set #2) was reading erratic values and corrupting the up_long_hemisp data completely. The net_ir was valid but cannot be corrected without the case thermistor measurement to determine the incoming IR (i.e. up_long_hemisp). |
Measurements: | sgpsirs20sE7.a0:
sgpsirsE7.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/28/2010 | 2330 | 02/01/2010 | 1815 |
Subject: | SGP/MET/E21 - Wind Sensor Inoperative Due to Ice |
DataStreams: | sgpmetE21.b1 |
Description: | Due to an ice storm the wind sensor was inoperative. |
Measurements: | sgpmetE21.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/21/2010 | 0759 | 02/24/2010 | 1644 |
Subject: | SGP/MET/E4 - Wind sensor frozen |
DataStreams: | sgpmetE4.b1 |
Description: | Icing resulted in flatlined wind speed and direction measurements. |
Measurements: | sgpmetE4.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/18/2009 | 1625 | 03/16/2010 | 1518 |
Subject: | SGP/SIRS/E9 - Downwelling SW sensor alignment/level |
DataStreams: | sgpsirsE9.b1, sgpsirs20sE9.a0 |
Description: | On clear days, the down_short_hemisp data (PSP instrument) exhibit asymmetry in its daily output curve especially when compared to derived downwelling shortwave. Ops corrected the problem by re-leveling the PSP on 3/16/2010. The issue may likely be due to a slowly sinking platform at this site or inadvertent loosening of instrument hold down screws. Problem may have developed slowly over the last year. Corrections are not easily quantifiable. Suggest using derived downwelling shortwave which is not dependent on the PSP instrument: derived DS = down_short_diffuse + short_direct_normal * cos(zenith angle) |
Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/26/2010 | 0000 | 05/04/2010 | 1935 |
Subject: | SGP/SIRS/E21 - Tracker failure |
DataStreams: | sgpsirsE21.b1, sgpsirs20sE21.a0 |
Description: | First apparent on 03/26, the short_direct_normal values were incorrect after approximately 1700GMT each day. The tracker was found to have excessive clock drift and was reset by site ops on 05/04/2010 and returned to service at 1935GMT. The down_short_diffuse_hemisp values appear unaffected by the tracker misalignment. The short_direct_normal data values are suspect after approximately 1800GMT each day from 03/26 to 04/26 and after 1700GMT from 04/27 to the end of the period. The short_direct_normal data are not recoverable but can be calculated indirectly using the following relationship for each minute of data: down_short_hemsip = short_direct_normal * cos(zenith angle) + down_short_diffuse |
Measurements: | sgpsirs20sE21.a0:
sgpsirsE21.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/29/2010 | 0302 | 06/01/2010 | 1550 |
Subject: | SGP/SIRS/E11 - Multiplexer problem |
DataStreams: | sgpsirsE11.b1, sgpsirs20sE11.a0 |
Description: | Values of down_short_hemisp, down_long_shaded_hemisp and up_long_hemisp began intermittently dropping out beginning 04/29. This problem gradually became worse, but remained intermittent from day to day. Site ops reseated the mux connections and replaced the logger wiring panel on 6/1 approx 1600GMT which corrected the problem. The automatic quality control flags for the three affected datastreams can be very effective at determining the suspect/bad data values for exclusion. Alternatively the affected dates and times are given below: 4/29 0302,0345,1312,1405,1905GMT 5/05 0144,1525-1550,1900-2100GMT 5/06 1615,1924GMT 5/10 2000-2359GMT 5/11 1720-1755GMT 5/13 1430-1630GMT 5/14 1700-1900GMT 6/01 1500-1650GMT |
Measurements: | sgpsirs20sE11.a0:
sgpsirsE11.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/09/2010 | 0745 | 06/12/2010 | 1630 |
Subject: | SGP/SIRS/E6 - Datalogger failure |
DataStreams: | sgpsirsE6.b1, sgpsirs20sE6.a0 |
Description: | During this time period all SIRS instruments experienced intermittent data dropouts. Starting 6/9/2010 the up_long hemisp and up_short_hemisp instruments dropped out. On 6/10 approximately 1800GMT the down_long hemisp instrument and down_short_hemisp instruments started dropping out. In addition, after this time all values from the logger became intermittent. On 06/12/2010 site ops replaced the logger and wiring panel at approx. 1500 GMT. All systems were returned to service approximately 1630GMT. |
Measurements: | sgpsirsE6.b1:
sgpsirs20sE6.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/01/2010 | 0000 | 06/14/2010 | 1625 |
Subject: | SGP/SIRS/E11 - Intake Fan Failure |
DataStreams: | sgpsirsE11.b1, sgpsirs20sE11.a0 |
Description: | Data were missing from this station from 5/27 to 6/1. After collections resumed on 6/1, the first night (6/2) data revealed down_short_hemisp (PSP) and down_short_diffuse_hemisp (8-48) data consistent with ventilator fan failure or obstructed fan filter resulting in large thermal offsets. On 6/14 Ops cleaned obstructed ventilator fans on both 8-48 and PSP instruments which corrected the large thermal offsets. The PSP was seriously affected and possibly the 8-48 to a lesser degree. Due to correction on a partly cloudy day the degree of thermal offset cannot be well quantified. Users are advised to avoid the PSP data (down_short_hemisp) completely during this time period. The 8-48 data (down_short_diffuse_hemisp) are suspect. |
Measurements: | sgpsirs20sE11.a0:
sgpsirsE11.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/2010 | 0005 | 05/07/2010 | 0215 |
Subject: | SGP/SIRS/E9 - TimeCheck Error |
DataStreams: | sgpsirsE9.b1, sgpsirs20sE9.a0 |
Description: | The sgp.E9 instruments (EBBR, MET, SIRS, SWATS) time clocks were drifting outside the allowable +/-3 seconds. During the specified period, the swings ranged from -326 to +637 seconds. This period was around sunset May 6th (local time) and in the few hours immediately after sunset. |
Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/26/2010 | 0000 | 06/21/2010 | 2021 |
Subject: | SGP/MET/E20 - Rain Gauge Cable Chewed by Rodents |
DataStreams: | sgpmetE20.b1 |
Description: | The rain gauge cable was damaged by rodents. At the beginning of the time period, the data was falsely indicating nearly constant precipitation. Later it was falsely reporting no precipitation during a large rain event. Data are not recoverable. |
Measurements: | sgpmetE20.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/19/2010 | 1200 | 07/07/2010 | 1710 |
Subject: | SGP/SIRS/E6 - Incorrect upwelling longwave hemisp |
DataStreams: | sgpsirsE6.b1, sgpsirs20sE6.a0 |
Description: | Beginning 6/19 ~1200 GMT, the upwelling longwave hemispheric data (up_long_hemisp) became erratic and spiked to extreme values. Site ops found a broken wire on the multiplexer. Repairs were completed on 7/7/2010 ~1700 GMT and the unit returned to service. |
Measurements: | sgpsirsE6.b1:
sgpsirs20sE6.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/05/2010 | 1700 | 08/10/2010 | 1628 |
Subject: | SGP/SIRS/E7 - NIP connector failure |
DataStreams: | sgpsirsE7.b1, sgpsirs20sE7.a0 |
Description: | After instrument replacement 8/5/2010 approx 1700GMT the short_direct_normal values became intermittent due to a failed NIP connector. Ops repaired the connector on 8/10 rectifying the problem. The short_direct_normal (NIP instrument) data are not recoverable during this period. Although there will be greater uncertainty the short_direct_normal can be reconstructed from the global and diffuse measurements for each minute of data using the following relationship: down_short_hemisp = short_direct_normal*cos(zenith angle) + down_short_diffuse. |
Measurements: | sgpsirs20sE7.a0:
sgpsirsE7.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/13/2010 | 0030 | 08/31/2010 | 1800 |
Subject: | SGP/SIRS/E6 - Multiplexer problem |
DataStreams: | sgpsirsE6.b1, sgpsirs20sE6.a0 |
Description: | Beginning on 8/13, the MUX had unknown problems that affected the upwelling PIR(up_long_hemisp)and downwelling PIR (down_long_hemisp_shaded) and the downwelling shortwave(down_short_hemisp). MUX replaced 8/31 at approximately 1600 CST. Problem resolved when MUX replaced. |
Measurements: | sgpsirsE6.b1:
sgpsirs20sE6.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/07/2010 | 0000 | 06/29/2010 | 2359 |
Subject: | SGP/SIRS/E21 - Reprocessing: TimeCheck Error |
DataStreams: | sgpsirsE21.00, sgpsirsE21.b1, sgpsirs20sE21.a0 |
Description: | The EF data system lost communication with the GPS likely starting on or around June 7th, the max time set For E21 was -5.04 sec. Since then, it has been increasing steadily: Jun 8 Offset: -267.449039 Jun 9 Offset: -541.038624 Jun 10 Offset: -814.469141 Jun 11 Offset: -1076.862114 Jun 12 Offset: -1350.330223 Jun 13 Offset: -1623.639335 Jun 14 Offset: -1897.047754 Jun 15 Offset: -2170.552312 Jun 16 Offset: -2422.130746 Jun 17 Offset: -2684.607495 Jun 18 - Jun 22 (unknown) Jun 23 Offset: -4204.730579 If the E21 system clock drifts the E21 Datalogger clocks will be set to the same incorrect time. SIRS irradiance data will be correct but the corresponding time stamp cannot be accurately known or simply corrected for. |
Measurements: | sgpsirs20sE21.a0:
sgpsirsE21.00:
sgpsirsE21.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/18/2010 | 0000 | 11/24/2010 | 1605 |
Subject: | SGP/SIRS/E11 - Reprocess: Incorrect calibration coefficients |
DataStreams: | sgpsirsE11.b1, sgpsirs20sE11.a0 |
Description: | Likely near 00:00GMT on 11/18/2010 (Site is missing data from 0000 to 0006 on 11/18) the calibration coefficients and serial numbers for the SIRS program at E11 reverted to the previous year's(2009/2010) installed shortwave instruments. Site ops re-loaded the correct program on 11/24. Reprocessing will be required for all shortwave instruments. Incorrect cal coeffs applied during this period: Diffuse PSP: 113.21 W/(m^2*mV) PSP-US: 115.00 W/(m^2*mV) NIP: 115.83 W/(m^2*mV) PSP-DS: 115.95 W/(m^2*mV) Correct cal coeffs to apply: Diffuse PSP: 111.05 W/(m^2*mV) PSP-US: 115.10 W/(m^2*mV) NIP: 127.22 W/(m^2*mV) PSP-DS: 121.20 W/(m^2*mV) Back out old cal apply new: Diffuse PSP(down_short_diffuse_hemisp): 111.05/113.21=0.98092 PSP-US(up_short_hemisp):115.10/115.00=1.0010 NIP(short_direct_normal):127.22/115.83=1.09833 PSP-DS(down_short_hemisp): 121.20/115.95=1.0453 |
Measurements: | sgpsirs20sE11.a0:
sgpsirsE11.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/20/2010 | 1900 | 11/01/2010 | 1539 |
Subject: | SGP/MET/E11 - Intermittent incorrect windspeed |
DataStreams: | sgpmetE11.b1 |
Description: | Starting on 10/20 the wind speed values intermittently flatlined. Site operations reseated cable on 11/1. |
Measurements: | sgpmetE11.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
09/09/2010 | 0000 | 01/10/2011 | 2000 |
Subject: | SGP/MET/E13 - Missing PWD data |
DataStreams: | sgpmetE13.b1 |
Description: | PWD data were missing due to an accidental reset on the instrument. |
Measurements: | sgpmetE13.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/07/2010 | 0000 | 06/29/2010 | 2359 |
Subject: | SGP/MET/E21 - TimeCheck Error |
DataStreams: | sgpmetE21.b1 |
Description: | Starting on 2010-06-07 the E21 system clock started drifting until the problem was corrected on 2010-06-29. The maximum daily offset reported in the collection logs were: Jun 7 offset: -5.04 Jun 8 Offset: -267.449039 Jun 9 Offset: -541.038624 Jun 10 Offset: -814.469141 Jun 11 Offset: -1076.862114 Jun 12 Offset: -1350.330223 Jun 13 Offset: -1623.639335 Jun 14 Offset: -1897.047754 Jun 15 Offset: -2170.552312 Jun 16 Offset: -2422.130746 Jun 17 Offset: -2684.607495 Jun 18 - Jun 22 (unknown) Jun 23 Offset: -4204.730579 If the E21 system clock drifts the E21 Datalogger clocks will be set to the same incorrect time. The met data will be correct but the corresponding time stamp cannot be accurately known or simply corrected. |
Measurements: | sgpmetE21.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/07/2010 | 0005 | 05/07/2010 | 0215 |
Subject: | SGP/MET/E9 - TimeCheck Error |
DataStreams: | sgpmetE9.b1 |
Description: | On May 7th the sgp.E9 instruments (EBBR, MET, SIRS, SWATS) time clocks were drifting outside the allowable +/-3 seconds. During the specified period, the swings ranged from -326 to +637 seconds. |
Measurements: | sgpmetE9.b1:
|