DQR ID | Subject | Data Streams Affected |
---|---|---|
D020426.6 | SGP/TSI/C1 - sampling rate change | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
D030130.3 | SGP/TSI/C1 - Metadata Errors in NetCDF Header | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
D030312.10 | SGP/MWR/C1 - Intermittent Negative Sky Brightness Temperatures | sgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpmwrlosC1.a1, sgpmwrlosC1.b1 |
D040526.1 | SGP/TSI/C1 - Metadata errors | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
D050502.2 | SGP/SIRS/C1 - SWFANAL Data description error | sgp15swfanalsirs1longC1.c1, sgp1swfanalsirs1longC1.c1 |
D050502.3 | SGP/BRS/C1 - SWFANAL Data description error | sgp15swfanalbrs1longC1.c1, sgp1swfanalbrs1longC1.c1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/02/2000 | 0035 | 04/26/2002 | 0018 |
Subject: | SGP/TSI/C1 - sampling rate change |
DataStreams: | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
Description: | SGP TSI-880 sampling rate changed from 20-second to 30-second at 20020426.001900 UTC (20020425.1819 SGP CF local time) per ECR-00226 and BCR-00491. This change brings all ARM TSIs to the same operational sampling rate. Daily SGP TSI data volume will decrease by about 1/3 due to this change. |
Measurements: | sgptsiskycoverC1.a1:
sgptsiskycoverC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/02/2000 | 0035 | 01/21/2003 | 2359 |
Subject: | SGP/TSI/C1 - Metadata Errors in NetCDF Header |
DataStreams: | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
Description: | The value of "sample_int" reported in the netCDF header is incorrect. The correct sampling interval is 30 seconds. The maximum values for the variable "sunny" is incorrect. It should be 1, not 100 as documented in the netCDF header. Users should disregard the "qc_sunny" flag during this period of time and apply their own qc check if desired. The minimum value for the variable "solar.altitude" is incorrect. It should be -90, not 10 as documented in the netCDF header. Users should disregard the "qc_solar.altitude" flag during this period of time and apply their own qc check if desired. |
Measurements: | sgptsiskycoverC1.a1:
sgptsiskycoverC1.b1:
|
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:
sgp1mwravgC1.c1:
sgpmwrlosC1.a1:
sgpmwrlosC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/02/2000 | 0035 | 05/05/2003 | 2359 |
Subject: | SGP/TSI/C1 - Metadata errors |
DataStreams: | sgptsiskycoverC1.a1, sgptsiskycoverC1.b1 |
Description: | The latitude, longitude and altitude of the Total Sky Imager (TSI) were incorrectly entered into the ARM database. The correct location of the SGP.C1 TSI is: Lat: 36.606N Lon: 97.485W Alt: 316m |
Measurements: | sgptsiskycoverC1.a1:
sgptsiskycoverC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/25/1997 | 0000 | 12/10/2003 | 2359 |
Subject: | SGP/SIRS/C1 - SWFANAL Data description error |
DataStreams: | sgp15swfanalsirs1longC1.c1, sgp1swfanalsirs1longC1.c1 |
Description: | The long name attribute for the cloud effect fields incorrectly defines the cloud effect to be the difference between the clearskyfit and measured values: "Difference: ***fluxdn_clearskyfit - ***fluxdn_measured (***fcg)" ; The cloud effects are correctly calculated by subtracting the irradiance calculated in the clear sky fit from the measured irradiance. "Difference: ***fluxdn_measured - ***fluxdn_clearskyfit (***fcg)" ; NOTE: this is just a documentation error. The data are correctly calculated. |
Measurements: | sgp1swfanalsirs1longC1.c1:
sgp15swfanalsirs1longC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/01/2001 | 0000 | 12/10/2003 | 2359 |
Subject: | SGP/BRS/C1 - SWFANAL Data description error |
DataStreams: | sgp15swfanalbrs1longC1.c1, sgp1swfanalbrs1longC1.c1 |
Description: | The long name attribute for the cloud effect fields incorrectly defines the cloud effect to be the difference between the clearskyfit and measured values: "Difference: ***fluxdn_clearskyfit - ***fluxdn_measured (***fcg)" ; The cloud effects are correctly calculated by subtracting the irradiance calculated in the clear sky fit from the measured irradiance. "Difference: ***fluxdn_measured - ***fluxdn_clearskyfit (***fcg)" ; NOTE: this is just a documentation error. The data are correctly calculated. |
Measurements: | sgp15swfanalbrs1longC1.c1:
sgp1swfanalbrs1longC1.c1:
|