DQR ID | Subject | Data Streams Affected |
---|---|---|
D040217.2 | SGP/CO2FLX/C1 - Reprocessing User Notes | sgp30co2flx4mC1.b1, sgp30co2flx25mC1.b1, sgp30co2flx60mC1.b1, sgp30co2flx4mmetC1.b1 |
D040217.3 | SGP/CO2FLX/C1 - Reprocessing User Notes | sgp30co2flx4mmetC1.b1 |
D040505.5 | SGP/CO2FLX/C1 - Longwave Radiation Incorrect | sgp30co2flx4mmetC1.b1 |
D041026.1 | SGP/CO2FLX/C1 - Reprocess: Units | sgp30co2flx4mC1.b1, sgp30co2flx25mC1.b1, sgp30co2flx60mC1.b1 |
D041103.1 | SGP/CO2FLX/C1 - Mean CO2 density incorrect, CO2 flux suspect | sgp30co2flx60mC1.b1 |
D050316.1 | SGP/CO2FLX/C1 - Reprocessed: User Notes | sgp30co2flx4mmetC1.b1 |
D051116.2 | SGP/CO2FLX/C1 - downwelling longwave hemispheric irradiance incorrect | sgp30co2flx4mmetC1.b1 |
D051116.3 | SGP/CO2FLX/C1 - Soil Temperature measurements | sgp30co2flx4mmetC1.b1 |
D070416.4 | SGP/CO2FLX/C1 - downwelling longwave hemispheric irradiance incorrect | sgp30co2flx4mmetC1.b1 |
D071011.2 | SGP/CO2FLX/C1 - Reprocess: 4m instruments height | sgp30co2flx4mC1.b1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2002 | 0000 | 02/17/2004 | 0000 |
Subject: | SGP/CO2FLX/C1 - Reprocessing User Notes |
DataStreams: | sgp30co2flx4mC1.b1, sgp30co2flx25mC1.b1, sgp30co2flx60mC1.b1, sgp30co2flx4mmetC1.b1 |
Description: | Format Changes: To comply with archive standards, the name of the unlimited dimention variable in the cdf level b1 files was changed from 'record' to 'time'. This does not affect data quality. |
Measurements: | sgp30co2flx4mC1.b1:
sgp30co2flx4mmetC1.b1:
sgp30co2flx60mC1.b1:
sgp30co2flx25mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2002 | 0000 | 12/18/2003 | 0000 |
Subject: | SGP/CO2FLX/C1 - Reprocessing User Notes |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | A subset of the radiation measurements had an incorrect gain applied to raw data in period from 20021218-20031218. To correct for this, a multiplicative correction factor of 1.11 were applied to raw data used for the following variables: r_down_short_hemisp r_down_long_hemisp r_up_short_hemisp r_up_long_hemisp Note that the long wave variables are computed by adding the black body thermal radiation from the radiometer body to each of the long wave signals. Hence, the multiplicative correction is applied to the raw long wave fluxes before adding in the flux from the radiometer body. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2003 | 0000 | 04/28/2004 | 1900 |
Subject: | SGP/CO2FLX/C1 - Longwave Radiation Incorrect |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | Long wave radiation values (r_up_long_hemisp, r_down_long_hemisp) are bad due to correction with bad radiometer body temperature (t_rad) resulting from a wiring issue. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2002 | 0000 | 10/12/2004 | 2359 |
Subject: | SGP/CO2FLX/C1 - Reprocess: Units |
DataStreams: | sgp30co2flx4mC1.b1, sgp30co2flx25mC1.b1, sgp30co2flx60mC1.b1 |
Description: | Mean CO2 density units are incorrectly labeled as umol m-3. Units should be labeled as mmol m-3. |
Measurements: | sgp30co2flx4mC1.b1:
sgp30co2flx60mC1.b1:
sgp30co2flx25mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2004 | 1900 | 10/20/2004 | 1800 |
Subject: | SGP/CO2FLX/C1 - Mean CO2 density incorrect, CO2 flux suspect |
DataStreams: | sgp30co2flx60mC1.b1 |
Description: | A problem was identified with the calibration of the instrument over the time period October 12, 2004 to October 20, 2004. The offset of the instrument is known to be incorrect over this time frame, and a study of the gain of the instrument is underway. |
Measurements: | sgp30co2flx60mC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2002 | 0000 | 03/15/2005 | 2359 |
Subject: | SGP/CO2FLX/C1 - Reprocessed: User Notes |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | Replacement of LI-200 sensor (total downwelling shortwave radiation, variable r_tot) by a new LI-190 sensor (upwelling photosynthetic photon flux density, variable ppfd_up). The new LI-190 sensor was: - installed on December 9, 2004. - being tested from December 9, 2004 to December 22, 2004. - operational after December 22, 2004. Consequently: 1. variable "r_tot" is filled with missing values (qc_r_tot = 1) after December 9, 2004, 2. variable "ppfd_up" is filled with missing values (qc_ppfd_up = 1) prior December 22, 2004. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/28/2004 | 1900 | 11/16/2005 | 0000 |
Subject: | SGP/CO2FLX/C1 - downwelling longwave hemispheric irradiance incorrect |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | A problem was identified with the downwelling longwave hemispheric irradiance (variable "r_down_long_hemisp") calibration of our Kipp & Zonen CNR1 radiometer. The offset of the instrument is believed to be incorrect over the specified time frame, and a correction of the problem is underway. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/18/2002 | 0000 | 11/16/2005 | 0000 |
Subject: | SGP/CO2FLX/C1 - Soil Temperature measurements |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | Current data quality check (qc) procedure does not catch spikes in soil temperature measurements. A new qc procedure is being tested and will improve the current procedure. |
Measurements: | sgp30co2flx4mmetC1.b1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/28/2004 | 0000 | 04/02/2007 | 1930 |
Subject: | SGP/CO2FLX/C1 - downwelling longwave hemispheric irradiance incorrect |
DataStreams: | sgp30co2flx4mmetC1.b1 |
Description: | Downwelling longwave radiation measurements (variable "r_down_long_hemisp") are bad due to a wiring issue. Users should not use the downwelling longwave hemispheric irradiance during this period. The downwelling shortwave and longwave radiation at CF is also available from the Broadband Radiometer Station (BRS). |
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:
|