| DQR ID | Subject | Affected Data Streams | Data Quality Metric |
|---|---|---|---|
| D090507.2 | GRW/CEIL/M1 - Receiver failure | grwceilM1.b1 | Suspect |
| D100216.6 | GRW/CEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields | grwceilM1.b1 | Incorrect |
| D110504.1 | GRW/MPL/M1 - Time clock Error | grwmplpolavgM1.s1 | Suspect |
| D090715.1 | GRW/MPL/M1 - Missing data | grwmplpolavgM1.s1 | Missing |
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2009-04-22 | 09:25:00 | 2009-05-16 | 10:10:00 | Suspect |
| Subject: | GRW/CEIL/M1 - Receiver failure |
|---|---|
| Affected Datastreams: | grwceilM1.b1 |
| Description | The AMF VCEIL had lower-than-normal laser transmitter power, ~84%, so the instrument was replaced with a spare on 4/22. The spare VCEIL had just been repaired but began to display receiver failure warnings. Diagnostic information was sent to Vaisala and we discussed either replacing the receiver with the one from the original VCEIL (with the degraded transmitter) or replacing the transmitter in the original VCEIL with the one from the spare. Vaisala recommended the latter because the original VCEIL is a much newer unit. On 5/16, the site operator replaced the transmitter in the original VCEIL with the one from the spare, realigned the optics, recalibrated the laser, and put the instrument back into service, successfully correcting the problem. The data during this period were intermittently incorrect, containing warning flags and alarms and unreasonable cloud base heights. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2009-04-13 | 00:00:00 | 2009-10-31 | 23:59:00 | Incorrect |
| Subject: | GRW/CEIL/M1 - Reprocess: Incorrect serial_number and sum_backscatter fields |
|---|---|
| Affected Datastreams: | grwceilM1.b1 |
| Description | Attribute serial_number: In most cases, this field is not representative of the actual serial number of the instrument because the value did not change when an instrument changed locations or was replaced with a spare. Variable sum_backscatter: An out-of-range condition for the "sum of detected and normalized backscatter" was reported as 0 instead of missing (-9999). The valid range is 0 - 0.0999 /srad. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2010-04-30 | 00:00:00 | 2010-05-04 | 00:00:00 | Suspect |
| Subject: | GRW/MPL/M1 - Time clock Error |
|---|---|
| Affected Datastreams: | grwmplpolavgM1.s1 |
| Description | Domain Time II was not installed or working properly on the MPLPOL instrument at the initial start at GRW. The clock was off by 5 minutes 55 seconds at the beginning of the period and drifted further so it was off by 6 minutes 8 seconds at the end of the time period. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2009-07-14 | 20:59:00 | 2009-09-04 | 08:00:00 | Missing |
| Subject: | GRW/MPL/M1 - Missing data |
|---|---|
| Affected Datastreams: | grwmplpolavgM1.s1 |
| Description | Data are missing and unrecoverable. |
| Measurements |
|