DQR ID | Subject | Data Streams Affected | Data Quality Metric |
---|---|---|---|
D101020.7 | SGP/AOS/C1 - Data processing problem | sgpnoaaaosavgC1.b1 | Does not affect quality |
D120608.1 | SGP/AOS/C1 - CPC leak | sgpnoaaaosavgC1.b1 | Incorrect |
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
01/01/2009 | 0000 | 10/01/2010 | 0000 | Does not affect quality |
Subject: | SGP/AOS/C1 - Data processing problem |
DataStreams: | sgpnoaaaosavgC1.b1 |
Description: | The AOS data was reprocessed for the AMF, SGP and NSA sites. There was an error in the processing of the corrections for the PSAP absorption signal such that a low pass filter was implemented for the scattering data used in these corrections.The difference between the corrected and previous data is < 0.05 Mm-1 (below the instrument detection limit) and should not have a significant effect on the previous data. Data will be reprocessed at a later time when more significant changes to the data processing are implemented. |
Measurements: | sgpnoaaaosavgC1.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
10/01/2010 | 1540 | 04/18/2011 | 2010 | Incorrect |
Subject: | SGP/AOS/C1 - CPC leak |
DataStreams: | sgpnoaaaosavgC1.b1 |
Description: | There was a slow internal leak in the CPC instrument and the data slowly decreased over time. The CN concentration is a lower limit and is likely 5 to 20% lower than the actual value with higher errors toward the end of the DQR period. The problem was fixed by replacing the CPC saturator block. |
Measurements: | sgpnoaaaosavgC1.b1:
|