DQR ID | Subject | Data Streams Affected | Data Quality Metric |
---|---|---|---|
D040212.4 | SGP/PGS/C1 - Reprocessing User Notes | sgppgsC1.b1 | Does not affect quality |
D041015.2 | SGP/PGS/C1 - Reprocessing User Notes | sgppgsC1.b1 | Does not affect quality |
D050111.1 | SGP/PGS/C1 - Incorrect 60m Data | sgppgsC1.b1 | Incorrect |
D051118.1 | SGP/PGS/C1 - Suspicious 4m data | sgppgsC1.b1 | Suspect |
D051118.2 | SGP/PGS/C1 - Suspicious 2m data | sgppgsC1.b1 | Suspect |
D051118.3 | SGP/PGS/C1 - Suspicious 25m and 60m data | sgppgsC1.b1 | Suspect |
D051118.4 | SGP/PGS/C1 - Updated files | sgppgsC1.b1 | Does not affect quality |
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/11/2001 | 0000 | 02/12/2004 | 2359 | Does not affect quality |
Subject: | SGP/PGS/C1 - Reprocessing User Notes |
DataStreams: | sgppgsC1.b1 |
Description: | Time Variables - to make the PGS system more consistent with LBNL's other data streams, the variable 'yyyymmddhhmmss' was renamed 'yyyydddhhmmss'. Also, at the bottom of each file, variables 'yyyy','mon','hour','min' were added for those users who prefer to use these variables instead. The new 'time' variable (seconds since midnight of the start of file) was added to make files compatible with the new recommendations. Quality Control Flags - to prevent confusion, the quality control flags 'qc_co2ppm' and 'qc_sum_co2' were combined. The flag 'qc_sum_co2' was elliminated and 'qc_co2ppm' now performs range checking on 'co2ppm' variable as well as checking values of all dependencies' qc flags. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/11/2001 | 1156 | 08/31/2004 | 2359 | Does not affect quality |
Subject: | SGP/PGS/C1 - Reprocessing User Notes |
DataStreams: | sgppgsC1.b1 |
Description: | Precise Gas System (pgs) daily b1 files should have a dimension of 480, corresponding to a measurement every 3 minutes. Previously submitted files had a dimension of 481, the last time step of each individual file being mistakenly repeated. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/05/2005 | 0853 | 01/07/2005 | 2026 | Incorrect |
Subject: | SGP/PGS/C1 - Incorrect 60m Data |
DataStreams: | sgppgsC1.b1 |
Description: | Precise Gas system (PGS) data at 60m (channel 4) are incorrect. This problem is due to a freezing rain and ice storm that hit SGP Central facility on January 5, 2005. The 60m tower inlet was clogged with ice and consequently, no air was supplied to the PGS instrument. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
11/24/2004 | 0000 | 08/19/2005 | 0100 | Suspect |
Subject: | SGP/PGS/C1 - Suspicious 4m data |
DataStreams: | sgppgsC1.b1 |
Description: | KNF pump for 4m height (channel 2) started to leak on November 24, 2004 and sampled air was consequently "contaminated" by indoor air. The pump was replaced on August 19, 2005. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
07/22/2004 | 0000 | 08/19/2005 | 0100 | Suspect |
Subject: | SGP/PGS/C1 - Suspicious 2m data |
DataStreams: | sgppgsC1.b1 |
Description: | KNF pump for 2m height (channel 1) started to leak on July 22, 2004 and sampled air was consequently "contaminated" by indoor air. The pump was replaced on August 19, 2005. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
03/31/2005 | 0000 | 08/19/2005 | 0100 | Suspect |
Subject: | SGP/PGS/C1 - Suspicious 25m and 60m data |
DataStreams: | sgppgsC1.b1 |
Description: | KNF pumps for 25m and 60m height (channel 3 and channel 4) started to leak on March 31, 2005 and sampled air was consequently "contaminated" by indoor air. The pumps were replaced on August 19, 2005. |
Measurements: | sgppgsC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
04/11/2001 | 1156 | 10/31/2005 | 2359 | Does not affect quality |
Subject: | SGP/PGS/C1 - Updated files |
DataStreams: | sgppgsC1.b1 |
Description: | Dew point temperature (dpt) sensor (Vaisala DMT 142) was added to the system on May 24, 2005 to assess water trapping system efficiency. Consequently, variable "dpt" is filled with missing values (-999.99) prior measurements start date (May 24, 2005). |
Measurements: | sgppgsC1.b1:
|