DQR ID | Subject | Data Streams Affected | Data Quality Metric |
---|---|---|---|
D140702.4 | TWP/DL/C3 - No signal | twpdlfptC3.b1 | Incorrect |
D141120.1 | TWP/DL/C3 - Fault in RF attenuator | twpdlfptC3.b1 | Incorrect |
D160229.4 | TWP/DL/DLPROF/C3 - Instrumental artifact in vertical velocity variance profiles | twpdlfptC3.b1 | Suspect |
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/16/2014 | 0330 | 07/02/2014 | 0000 | Incorrect |
Subject: | TWP/DL/C3 - No signal |
DataStreams: | twpdlfptC3.b1 |
Description: | Laser and/or detection system failed resulting in no signal. The radial velocity and backscatter measurements are nothing but pure noise, i.e. no atmospheric signal. |
Measurements: | twpdlfptC3.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
06/16/2014 | 0000 | 11/05/2014 | 0641 | Incorrect |
Subject: | TWP/DL/C3 - Fault in RF attenuator |
DataStreams: | twpdlfptC3.b1 |
Description: | The instrument was shipped to the vendor (Halo Photonics) for repair. The root cause of the problem was traced to an intermittent fault in an RF attenuator in the transmitter. The RF attenuator was replaced. In addition to the repair, several upgrades were performed. These included the installation of a new PC with Win7, new control software, and the installation of a tip-tilt sensor. |
Measurements: | twpdlfptC3.b1:
|
Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/13/2010 | 1800 | 06/16/2014 | 0500 | Suspect |
Subject: | TWP/DL/DLPROF/C3 - Instrumental artifact in vertical velocity variance profiles |
DataStreams: | twpdlfptC3.b1 |
Description: | Long-term averages of vertical velocity variance profiles developed from vertical staring data show a height-dependent sinusoidal modulation superimposed on the atmospheric variance profile. This modulation causes a wiggle in the variance profile. The period of the wiggle is about 350 m, and the effect is most obvious during hot afternoon periods in the summer months. The exact cause of this problem is not known, but we suspect that it may be caused by temperature sensitivity in beam alignment. |
Measurements: | twpdlfptC3.b1:
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