DQR ID | Subject | Data Streams Affected |
---|---|---|
D070402.1 | SGP/ECOR/E21 - Intermittent incorrect flux measurements | sgp30ecorE21.b1 |
D070619.1 | SGP/ECOR/E5 - Flux Data Incorrect | sgp30ecorE5.b1 |
D070803.2 | SGP/CO2FLX/C1 - Disturbance around site | sgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx4mmetC1.b1, sgp30co2flx60mC1.b1 |
D070918.3 | SGP/CO2FLX/C1 - Farm operation | sgp30co2flx4mmetC1.b1 |
D071011.2 | SGP/CO2FLX/C1 - Reprocess: 4m instruments height | sgp30co2flx4mC1.b1 |
D080313.1 | SGP/ECOR/E24 - Water Vapor Density Incorrect | sgp30ecorE24.b1 |
D080428.1 | SGP/ECOR/E24 - Half Hours of Data Missing | sgp30ecorE24.b1 |
D080604.2 | SGP/ECOR/E14 - Sensor failure | sgp30ecorE14.b1 |
D090122.1 | SGP/ECOR/E21 - Reprocess: 5 hour time offset | sgp30ecorE21.b1 |
D090217.2 | SGP/ECOR/E5 - Incorrect Sensible and Latent Heat Fluxes | sgp30ecorE5.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/01/2007 | 0800 | 08/29/2007 | 1730 |
Subject: | SGP/ECOR/E21 - Intermittent incorrect flux measurements |
DataStreams: | sgp30ecorE21.b1 |
Description: | At various times during the period, the LI-7500 CO2/H2O serial and analog signals from the LI-7500 were missing, but usually not at the same time. When the CO2/H2O serial datastream was missing, the Pressure and Temperature were missing; this did not, in itself, result in incorrect fluxes, as default values for pressure and temperature are automatically used. Fluxes were incorrect when the CO2/H2O analog datastream was missing; these times are identified by the qc checks. |
Measurements: | sgp30ecorE21.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
06/16/2007 | 0300 | 12/12/2007 | 2030 |
Subject: | SGP/ECOR/E5 - Flux Data Incorrect |
DataStreams: | sgp30ecorE5.b1 |
Description: | CO2 flux (lv_e) and latent heat flux (fc) were incorrect because the sonic anemometer was not working. |
Measurements: | sgp30ecorE5.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/24/2007 | 1300 | 07/26/2007 | 2359 |
Subject: | SGP/CO2FLX/C1 - Disturbance around site |
DataStreams: | sgp30co2flx25mC1.b1, sgp30co2flx4mC1.b1, sgp30co2flx4mmetC1.b1, sgp30co2flx60mC1.b1 |
Description: | A bulldozer used to excavate the SGP Tower anchors was right around (within 10 feet) our systems. |
Measurements: | sgp30co2flx4mC1.b1:
sgp30co2flx4mmetC1.b1:
sgp30co2flx60mC1.b1:
sgp30co2flx25mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
08/22/2007 | 1830 | 09/07/2007 | 1800 |
Subject: | SGP/CO2FLX/C1 - Farm operation |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | Soil temperature, soil moisture, soil heat flux and upwelling surface radiation (long, short, and PAR) measurements were not valid from 20070822 to 20070907 due to farm operations. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/17/2003 | 0000 | 10/11/2007 | 0000 |
Subject: | SGP/CO2FLX/C1 - Reprocess: 4m instruments height |
DataStreams: | sgp30co2flx4mC1.b1 |
Description: | The height of the 4m instruments is 4.8 m and not 4.65 m as shown in b1 datastream |
Measurements: | sgp30co2flx4mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/01/2008 | 0000 | 04/12/2008 | 0230 |
Subject: | SGP/ECOR/E24 - Water Vapor Density Incorrect |
DataStreams: | sgp30ecorE24.b1 |
Description: | Mean Water Vapor Density (mean_q) often did not trend well with the co-located SMOS and sometimes jumped downwards approximately 200 to 300 mmol/m^3. Some of the instances were clearly a result of contamination by precipitation, but others were not; the latent heat flux was sometimes affected. It was determined that all instances of this behavior from the beginning of 2008 through the beginning date of this DQR were caused by precipitation/dew/frost. |
Measurements: | sgp30ecorE24.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/27/2006 | 0530 | 11/08/2007 | 1600 |
Subject: | SGP/ECOR/E24 - Half Hours of Data Missing |
DataStreams: | sgp30ecorE24.b1 |
Description: | Individual half hours of data were missing infrequently because of a UPS problem. The extent of missing data is minimal, with only a few to several half hours missing most months. Data quality of the surrounding data times was not affected. |
Measurements: | sgp30ecorE24.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/02/2008 | 1330 | 06/05/2008 | 1930 |
Subject: | SGP/ECOR/E14 - Sensor failure |
DataStreams: | sgp30ecorE14.b1 |
Description: | The water vapor output of the LI-7500 was too low, indicating that water vapor leaked into the sensor and that the chemicals are spent or there was an electronic failure. Latent heat flux was not normally affected by this problem. |
Measurements: | sgp30ecorE14.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
01/20/2009 | 2030 | 01/22/2009 | 1800 |
Subject: | SGP/ECOR/E21 - Reprocess: 5 hour time offset |
DataStreams: | sgp30ecorE21.b1 |
Description: | The system clock was mistakenly set to DST instead of GMT. All times are 5 hours behind. |
Measurements: | sgp30ecorE21.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/16/2009 | 0400 | 04/01/2009 | 1730 |
04/06/2009 | 0400 | 04/06/2009 | 1730 |
04/24/2009 | 1400 | 04/29/2009 | 2230 |
Subject: | SGP/ECOR/E5 - Incorrect Sensible and Latent Heat Fluxes |
DataStreams: | sgp30ecorE5.b1 |
Description: | Starting at approximately 4:00 GMT on 02/16, the ECOR suffered from the "garbled" data condition, a result of a serial communication failure. All sensible and latent heat flux measurements are incorrect during this condition. |
Measurements: | sgp30ecorE5.b1:
|