| DQR ID | Subject | Data Streams Affected |
|---|---|---|
| D041026.3 | SGP/AOS/C1 - PCASP instrument problem | sgpaosC1.a0, sgpaosauxC1.a0 |
| D050120.2 | SGP/AOS/C1 - Failed RH sensor | 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 |
|---|---|---|---|
| 01/10/2004 | 0000 | 10/26/2004 | 1200 |
| Subject: | SGP/AOS/C1 - PCASP instrument problem |
| DataStreams: | sgpaosC1.a0, sgpaosauxC1.a0 |
| Description: | PCASP (optical particle counter) gave unusually low aerosol signal counts despite numerous attempts to fix the instrument by the mentor and manufacturer. |
| Measurements: | sgpaosauxC1.a0:
sgpaosC1.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 |
|---|---|---|---|
| 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:
|