| DQR ID | Subject | Affected Data Streams | Data Quality Metric |
|---|---|---|---|
| D990909.4 | TWP/SKYRAD/C2 - IRT calibration | twpskyrad60sC2.b1 | Incorrect |
| D040428.3 | TWP/SKYRAD/C2 - IRT affected by rain or shutter | twpskyrad60sC2.a1 | Suspect |
| D990909.2 | Calibration data interruption at TWP Nauru | twpskyrad60sC2.b1 | Missing |
| D141114.6 | TWP/SKYRAD/C2 - IRT affected by rain or shutter | twpskyrad60sC2.a1 | Incorrect |
| D011019.8 | TWP/SKYRAD/C2 - Solar tracker failure | twpskyrad60sC2.a1 | Incorrect |
| D030417.1 | TWP/SKYRAD/C2 - UVB Data questionable/incorrect due to uncontrolled sensor temperature | twpskyrad60sC2.b1 | Suspect |
| D000608.1 | TWP/SKYRAD/C2 - Probable window contamination | twpskyrad60sC2.b1 | Suspect |
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 1999-08-08 | 02:00:00 | 1999-08-08 | 02:30:00 | Incorrect |
| Subject: | TWP/SKYRAD/C2 - IRT calibration |
|---|---|
| Affected Datastreams: | twpskyrad60sC2.b1 |
| Description | IRT covered with Black-Body for calibration check. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 1999-01-14 | 00:00:00 | 2001-10-29 | 23:59:00 | Suspect |
| Subject: | TWP/SKYRAD/C2 - IRT affected by rain or shutter |
|---|---|
| Affected Datastreams: | twpskyrad60sC2.a1 |
| Description | During this time period, the SKYRAD IRT data was affected by rain events due to a shutter which was installed to protect the optics from being emersed in rainwater. While the shutter was closed, or if water got on the lens, the IRT data was invalid. If water did get on the lens, the contamination usually persisted until an operator cleaned the optics. It is left to the data users to identify the periods of affected data and filter the data according to their needs. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 1999-08-07 | 04:15:00 | 1999-08-07 | 06:00:00 | Missing |
| Subject: | Calibration data interruption at TWP Nauru |
|---|---|
| Affected Datastreams: | twpskyrad60sC2.b1 |
| Description | Data interrupted to perform electronic calibration of data logger |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 1998-12-17 | 02:30:00 | 1998-12-17 | 04:00:00 | Incorrect |
| 1998-12-10 | 04:30:00 | 1998-12-10 | 05:30:00 | Incorrect |
| 1998-12-10 | 11:30:00 | 1998-12-10 | 12:30:00 | Incorrect |
| 1999-01-13 | 14:16:00 | 1999-01-13 | 16:35:00 | Incorrect |
| 1999-01-12 | 22:35:00 | 1999-01-12 | 23:45:00 | Incorrect |
| 1998-12-17 | 13:00:00 | 1998-12-17 | 15:00:00 | Incorrect |
| 1999-01-13 | 21:41:00 | 1999-01-13 | 23:30:00 | Incorrect |
| 1998-12-30 | 21:00:00 | 1998-12-31 | 03:00:00 | Incorrect |
| 1998-12-10 | 13:00:00 | 1998-12-10 | 17:00:00 | Incorrect |
| 1998-12-23 | 18:00:00 | 1998-12-23 | 20:00:00 | Incorrect |
| Subject: | TWP/SKYRAD/C2 - IRT affected by rain or shutter |
|---|---|
| Affected Datastreams: | twpskyrad60sC2.a1 |
| Description | During this time period, the SKYRAD IRT data was affected by rain events due to a shutter which was installed to protect the optics from being emersed in rainwater. While the shutter was closed, or if water got on the lens, the IRT data was invalid. If water did get on the lens, the contamination usually persisted until an operator cleaned the optics. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 1999-08-06 | 12:00:00 | 1999-10-15 | 12:00:00 | Incorrect |
| Subject: | TWP/SKYRAD/C2 - Solar tracker failure |
|---|---|
| Affected Datastreams: | twpskyrad60sC2.a1 |
| Description | During Reset7 (8/6) the skytracker firmware was upgraded for Y2K. While still at the site, the mentor noted that the tracker was sticking and replaced it on 8/8/99. The replacement tracker also failed. Repeated attempts through 8/13 were not successful. After 8/13, the tracker was not operational. It was found that the problem was the result of bugs in the Y2K compliant version (2.44) of the firmware. On 10/14, Jeff Zirzow installed a new tracker with the Y2K non-compliant version (2.43) of the firmware. It was correctly assumed that the Y2K issues would only be apparent at the 19991231-20000101 time boundary. Exact times of changes are not known; noon GMT (midnight Local) was used to adequately window the time period of the changes. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 1998-11-20 | 00:00:00 | 2003-03-03 | 23:59:00 | Suspect |
| Subject: | TWP/SKYRAD/C2 - UVB Data questionable/incorrect due to uncontrolled sensor temperature |
|---|---|
| Affected Datastreams: | twpskyrad60sC2.b1 |
| Description | The UVB was not temperature controlled to 25C as required to ensure accurate data. UVB data should ONLY be used after checking both the bit_data and twpskyrad20sC1.a1 uvb_temp or inst_down_uvb_temp. UVB data where the UVB temperature was outside the range of 24-26C should not be used. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 1999-01-16 | 04:00:00 | 1999-01-19 | 02:00:00 | Suspect |
| 1999-02-18 | 22:00:00 | 1999-02-20 | 23:00:00 | Suspect |
| 1999-12-01 | 00:00:00 | 1999-12-23 | 23:59:00 | Suspect |
| 1999-02-06 | 22:00:00 | 1999-02-08 | 03:00:00 | Suspect |
| Subject: | TWP/SKYRAD/C2 - Probable window contamination |
|---|---|
| Affected Datastreams: | twpskyrad60sC2.b1 |
| Description | On several occasions in early 1999, large (10 percent) differences between the global PSPs and the NIP were observed. In each case, the NIP reported low relative to the direct flux reported by the PSPs. These occurrences persisted for several days each time and were likely due to salt on one or more of the radiometers. There was a large discrepancy in the comparison of the PSPs and NIP during December (5-10 percent). This discrepancy got worse through the month and then suddenly improved after a rain event on December 23. There was likely salt deposited on the radiometer windows that was washed off in the rain. The observer daily rounds were being modified to include more regular cleaning of radiometers to address this issue. |
| Measurements |
|