| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D050120.2 | SGP/AOS/C1 - Failed RH sensor | sgpaosC1.a0 |
| D050401.1 | SGP/AOS/C1 - wet nephelometer out of service | sgpaosC1.a0 |
| D980528.1 | SGP/AOS/C1 - Optical Particle Counter (PCASP-X) down | sgpaosC1.a0, sgpaosauxC1.a0 |
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 01/01/2004 | 0000 | 05/01/2005 | 2359 |
| Subject: | SGP/AOS/C1 - Failed RH sensor |
| DataStreams: | sgpaosC1.a0 |
| Description: | The RH sensor inside the humidified nephelometer began to slowly decline in value in the upper RH range beginning in early 2004 and becoming more noticable poor on 20041117. The sensor currently reaches a high RH value of about 60% when the actual RH is closer to 80%. The sensor was replaced in the Spring of 2005, but the problem remained. Effective 1/1/2004, this sensor is not used to calculate scientific data and is therefore essentially abandoned in the field. An end-date of 20050501 is being used as a placeholder. |
| Measurements: | sgpaosC1.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 03/04/2005 | 0000 | 03/22/2005 | 1955 |
| Subject: | SGP/AOS/C1 - wet nephelometer out of service |
| DataStreams: | sgpaosC1.a0 |
| Description: | The humidified nephelometer was removed and shipped back to CMDL to test and work on the relative humidity sensor inside the instrument. |
| Measurements: | sgpaosC1.a0:
|
| Start Date | Start Time | End Date | End Time |
|---|---|---|---|
| 07/01/1997 | 0936 | 07/03/1997 | 1556 |
| 08/01/1997 | 1329 | 08/08/1997 | 1348 |
| 05/05/1998 | 0926 | 06/16/1998 | 1505 |
| 06/09/1999 | 0824 | 07/26/1999 | 2205 |
| 09/08/2000 | 0426 | 10/13/2000 | 1630 |
| 05/17/2002 | 0602 | 05/20/2005 | 1847 |
| 05/23/2002 | 2011 | 05/31/2002 | 1258 |
| 09/09/2002 | 0000 | 10/07/2002 | 1905 |
| Subject: | SGP/AOS/C1 - Optical Particle Counter (PCASP-X) down |
| DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
| Description: | The AOS Optical Particle Spectrometer (PCASP-X sizing probe) was down during these periods. This lowers the laser reference voltage and results in inaccurate sizing. |
| Measurements: | sgpaosauxC1.a0:
sgpaosC1.a0:
|