DQR ID | Subject | Data Streams Affected |
---|---|---|
D040706.4 | SGP/MPL/C1 - Reduced detection sensitivity | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
D050421.14 | SGP/MPL/C1 - Sensor Calibration | sgpmplC1.00, sgpmplC1.a1 |
D050914.3 | SGP/MPL/C1 - Instrument offline | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
D060621.2 | TWP/MPL/C2 - Optical throughput unacceptable | twpmplC2.00, twpmplC2.a1 |
D060621.3 | TWP/MPL/C2 - Detector on instrument failed. | twpmplC2.00, twpmplC2.a1 |
D060621.4 | TWP/MPL/C2 - Missing data | twpmplC2.00, twpmplC2.a1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/01/2004 | 1500 | 07/07/2004 | 0350 |
07/23/2004 | 2200 | 09/10/2004 | 2100 |
Subject: | SGP/MPL/C1 - Reduced detection sensitivity |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
Description: | During the time periods indicated, the laser power supply was low. This resulted in compromised detection sensitivity, particularly for thin clouds and/or during daylight hours. That is, some clouds may not have been identified. The low laser power would not have resulted in false positives. |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
sgpmplsmask1clothC1.c1:
sgpmplcmask1clothC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/03/2004 | 0000 | 02/23/2005 | 2300 |
Subject: | SGP/MPL/C1 - Sensor Calibration |
DataStreams: | sgpmplC1.00, sgpmplC1.a1 |
Description: | The Energy Monitor records the value of the laser energy. During the time in question, the laser energy exceed the maximum value in the calibration table for the energy monitor. In other words, the value is pegged. This condition does not affect the backscatter signal. But it will prevent users from normalizing the backscatter signal to the laser output. |
Measurements: | sgpmplC1.a1:
sgpmplC1.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
07/07/2004 | 0350 | 07/23/2004 | 2150 |
Subject: | SGP/MPL/C1 - Instrument offline |
DataStreams: | sgpmplC1.a1, sgpmplnor1campC1.c1, sgpmplcmask1clothC1.c1, sgpmplsmask1clothC1.c1 |
Description: | Instrument was taken offline due to a failure of the laser power supply. Data are missing and unrecoverable. |
Measurements: | sgpmplC1.a1:
sgpmplnor1campC1.c1:
sgpmplsmask1clothC1.c1:
sgpmplcmask1clothC1.c1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/01/2003 | 0000 | 11/12/2004 | 1900 |
Subject: | TWP/MPL/C2 - Optical throughput unacceptable |
DataStreams: | twpmplC2.00, twpmplC2.a1 |
Description: | The optical throughput of the MPL at Nauru is below an acceptable level. Despite an extended stay to address the problem in Feb 2003, the problem was unresolved. An additional repair was attempted in July 2003 with no significant success. Several optical components were replaced and the system was repeatedly re-aligned. The system appears to have been properly collimated as the shape of the signal is appropriate for both near and far range. The magnitude of the signal was simply too low. This signal decrease was apparent in ambient background values as well as from atmospheric signal, so the impact on data quality was not as severe as might otherwise be the case. The MPL was still capable of detecting high altitude cirrus (day and night) but the sensitivity was reduced. |
Measurements: | twpmplC2.a1:
twpmplC2.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
11/12/2004 | 1900 | 12/14/2004 | 2330 |
Subject: | TWP/MPL/C2 - Detector on instrument failed. |
DataStreams: | twpmplC2.00, twpmplC2.a1 |
Description: | The detector on the MPL failed. The result are zeros for the detector counts data. |
Measurements: | twpmplC2.a1:
twpmplC2.00:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/14/2004 | 2330 | 02/01/2005 | 2130 |
Subject: | TWP/MPL/C2 - Missing data |
DataStreams: | twpmplC2.00, twpmplC2.a1 |
Description: | The MPL was turned off due to a dead detector. |
Measurements: | twpmplC2.a1:
twpmplC2.00:
|