DQR ID | Subject | Data Streams Affected |
---|---|---|
D120306.1 | SGP/SIRS/E9 - Tracker failure | sgpsirsE9.b1, sgpsirs20sE9.a0 |
D120404.1 | SGP/SIRS/C1 - Reprocess: Incorrect downwelling longwave calibration coefficient | sgpsirs20sC1.a0, sgpsirsC1.b1 |
D120524.1 | SGP/SIRS/E21 - NIP data intermittently missing or incorrect | sgpsirs20sE21.a0, sgpsirsE21.b1 |
D120719.3 | SGP/SIRS/E37 - Instrument problem | sgpsirs20sE37.a0, sgpsirsE37.b1 |
D120719.4 | SGP/SIRS/E37 - Tracker and NIP repairs | sgpsirs20sE37.a0, sgpsirsE37.b1 |
D120720.1 | SGP/SIRS/E35 - Upwelling longwave resistor problem | sgpsirs20sE35.a0, sgpsirsE35.b1 |
D120809.1 | SGP/SIRS/E38 - Instrument problem | sgpsirs20sE38.a0, sgpsirsE38.b1 |
D120810.1 | SGP/SIRS/E31 - Instrument problem | sgpsirs20sE31.a0, sgpsirsE31.b1 |
D120810.2 | SGP/SIRS/E31 - Tracker Failure | sgpsirsE31.b1, sgpsirs20sE31.a0 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/03/2012 | 0000 | 02/13/2012 | 1823 |
Subject: | SGP/SIRS/E9 - Tracker failure |
DataStreams: | sgpsirsE9.b1, sgpsirs20sE9.a0 |
Description: | The solar tracker was not functioning during these periods. OPS found the solar tracker not running, power cycled suntracker and it normal operations resumed. Data from instruments directly reliant on tracker operations (short_direct_normal and down_short_diffuse_hemisp) are not recoverable. |
Measurements: | sgpsirs20sE9.a0:
sgpsirsE9.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/04/2012 | 0000 | 02/29/2012 | 1731 |
Subject: | SGP/SIRS/C1 - Reprocess: Incorrect downwelling longwave calibration coefficient |
DataStreams: | sgpsirs20sC1.a0, sgpsirsC1.b1 |
Description: | The calibration coeff and serial number for the down_long_hemisp_shaded was incorrect during the period specified. Correct Instrument serial number = 30010F3 K1 = 0.3125 Incorrect Instrument serial number = 30690F3 K1 = 0.2762 Data will be reprocessed. To correct the one minute data b1 datastream follow the procedure below: 1) Obtain the following variables from the 20s datastream for each one minute of the affected time range: inst_down_long_shaded_dome_resist (Rd) inst_down_long_shaded_case_resist (Rc) inst_down_long_hemisp_shaded_tp (tpDIR_mV) 2) using the 20s tp voltage in mV convert to uV. tpDIR[uV] = inst_down_long_hemisp_shaded_tp[mV]*1000[uV/mV] 3) For each 20s data entry convert Rd and Rc to temperature Td =1/ (a0 + (a1*LN (Rd*1000) + (a2*LN (Rd*1000)^3))) Tc = 1/ (a0 + (a1*LN (Rc*1000) + (a2*LN (Rc*1000)^3))) where a0 = 0.0010295 a1 = 0.0002391 a2 = 0.0000001568 4) Apply for each 20s data entry: (correct k1=0.3125) WinDIR(W/m^2)= [0.3125*tpDIR] + Sigma*Tc^4 -4*Sigma*(Td^4 - Tc^4) where, WinDIR = Corrected down_long_hemisp_shaded (W/m^2) Sigma = 5.6704E-8 (Stefan-Boltzman Constant) 5) Generate new 1 minute average from the three 20-second measurements |
Measurements: | sgpsirs20sC1.a0:
sgpsirsC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/08/2012 | 0030 | 04/30/2012 | 1430 |
05/01/2012 | 0000 | 05/16/2012 | 1740 |
Subject: | SGP/SIRS/E21 - NIP data intermittently missing or incorrect |
DataStreams: | sgpsirs20sE21.a0, sgpsirsE21.b1 |
Description: | The short_direct_normal data was showing negative values (<-50 W/m^2)(during first time range) and missing value (-9999)(during second time range) each day a little after sunrise. Primarily between the hours of 11:00 - 14:00 GMT. Site Ops repaired a broken wire in the NIP cable and data appeared OK after the repair. NIP data are not recoverable. Users can calculate short_direct normal component using: short_direct_normal = (down_short_hemisp - down_short_diffuse_hemisp)/cos(zenith angle) |
Measurements: | sgpsirs20sE21.a0:
sgpsirsE21.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/17/2012 | 0000 | 07/09/2012 | 1853 |
Subject: | SGP/SIRS/E37 - Instrument problem |
DataStreams: | sgpsirs20sE37.a0, sgpsirsE37.b1 |
Description: | The short_direct_normal value is having some issues. Data is missing starting 0123 GMT on 6/30 through current. Data is either close to 0 on clear days or not following normal trends prior to the aforementioned period. down_short_diffuse_hemisp is also suffering from some issues. Problem looks to have started on 6/17, but may have started earlier than that. |
Measurements: | sgpsirsE37.b1:
sgpsirs20sE37.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/17/2012 | 0000 | 07/09/2012 | 1853 |
Subject: | SGP/SIRS/E37 - Tracker and NIP repairs |
DataStreams: | sgpsirs20sE37.a0, sgpsirsE37.b1 |
Description: | The solar tracker at this site was replaced; communication problems with the replacement tracker were performed 7/2/12; NIP repair performed 7/9/12. Data for direct normal (NIP) and diffuse (8-48) are incorrect and nonrecoverable during affected period. Longwave data are generally unaffected by such tracker failures. |
Measurements: | sgpsirsE37.b1:
sgpsirs20sE37.a0:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
05/09/2012 | 0000 | 06/28/2012 | 2009 |
Subject: | SGP/SIRS/E35 - Upwelling longwave resistor problem |
DataStreams: | sgpsirs20sE35.a0, sgpsirsE35.b1 |
Description: | The up_long_hemisp was missing or showing intermittent spikes for the specified period. OPS discovered a bad UIR resistor and replaced it with new resistor. |
Measurements: | sgpsirs20sE35.a0:
sgpsirsE35.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2012 | 0000 | 06/12/2012 | 1616 |
Subject: | SGP/SIRS/E38 - Instrument problem |
DataStreams: | sgpsirs20sE38.a0, sgpsirsE38.b1 |
Description: | up_long_hemisp shows large steps and offsets in values (greater than physically possible incoming radiation) that were eventually atributed to a bad instrument cable connection. The up_long_hemsip values during the time range specified were intermittant, varying from 10 to 100% of any given day. |
Measurements: | sgpsirs20sE38.a0:
sgpsirsE38.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2012 | 0000 | 05/08/2012 | 1729 |
Subject: | SGP/SIRS/E31 - Instrument problem |
DataStreams: | sgpsirs20sE31.a0, sgpsirsE31.b1 |
Description: | Up_long_hemisp and up_long_netir are missing, noisy, or suspect during this time period. |
Measurements: | sgpsirs20sE31.a0:
sgpsirsE31.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/29/2012 | 0000 | 03/13/2012 | 1630 |
05/01/2012 | 0000 | 05/08/2012 | 1729 |
Subject: | SGP/SIRS/E31 - Tracker Failure |
DataStreams: | sgpsirsE31.b1, sgpsirs20sE31.a0 |
Description: | All tracker related datastreams are affected: short_direct_normal (NIP), down_short_diffuse_hemispheric (8-48), and possibly the down_long_hemisp_shaded (PIR) although it is not apparent in the reviewed data for the affected timeframe. |
Measurements: | sgpsirs20sE31.a0:
sgpsirsE31.b1:
|