DQR ID | Subject | Data Streams Affected |
---|---|---|
D130712.3 | NSA/HSRL/C1 - Reprocess: Missing atten_beta_r_backscatter | nsahsrlC1.a1 |
D130712.4 | NSA/HSRL/C1 - Degraded operation | nsahsrlC1.a1 |
D130712.5 | NSA/HSRL/C1 - Missing data | nsahsrlC1.a1 |
D130712.6 | NSA/HSRL/C1 - Instrument reinstallation | nsahsrlC1.a1 |
D130712.7 | NSA/HSRL/C1 - Degraded operation, laser instability, dirty window | nsahsrlC1.a1 |
D130712.8 | NSA/HSRL/C1 - Laser instability | nsahsrlC1.a1 |
Start Date | Start Time | End Date | End Time |
---|---|---|---|
02/22/2013 | 0000 | 08/01/2013 | 2359 |
Subject: | NSA/HSRL/C1 - Reprocess: Missing atten_beta_r_backscatter |
DataStreams: | nsahsrlC1.a1 |
Description: | Due to a processing error the atten_beta_r_backscatter variable is missing 100% of the time. This is not a critical problem as the rest of the subsequent derived fields are properly reported. Data will be reprocessed at a later date. |
Measurements: | nsahsrlC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
04/08/2011 | 0000 | 12/04/2011 | 2359 |
Subject: | NSA/HSRL/C1 - Degraded operation |
DataStreams: | nsahsrlC1.a1 |
Description: | The HSRL was suffering from operational issues following an enclosure overheating incident. Data continued to be collected, albeit with reduced power output, detection sensitivity, and calibration issues. It has utility for cloud and aerosol detection but must be used with caution. Heights and locations are quantitative and reliable, intensities are not. |
Measurements: | nsahsrlC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
12/05/2011 | 0000 | 10/08/2012 | 2359 |
Subject: | NSA/HSRL/C1 - Missing data |
DataStreams: | nsahsrlC1.a1 |
Description: | Data are missing and unrecoverable. |
Measurements: | nsahsrlC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/09/2012 | 0000 | 10/12/2012 | 2359 |
Subject: | NSA/HSRL/C1 - Instrument reinstallation |
DataStreams: | nsahsrlC1.a1 |
Description: | Instrument was being reinstalled. Data are not valid, do not use. |
Measurements: | nsahsrlC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
10/13/2012 | 0000 | 03/18/2013 | 1730 |
Subject: | NSA/HSRL/C1 - Degraded operation, laser instability, dirty window |
DataStreams: | nsahsrlC1.a1 |
Description: | Following installation instrument was still not operating optimally. Laser instability and reduced sensitivity were impacting measurements. Cleaning of the external window improved signal levels and sensitivity on March 18 17:30. The height of detected clouds and aerosols is quantitative and accurate however the calibrated backscatter quantities are uncertain. Nevertheless, the sensitivity of the HSRL even in this degraded capacity is superior to VCeil and MPL for cloud and aerosol detection. |
Measurements: | nsahsrlC1.a1:
|
Start Date | Start Time | End Date | End Time |
---|---|---|---|
03/18/2013 | 1730 | 07/19/2013 | 2230 |
Subject: | NSA/HSRL/C1 - Laser instability |
DataStreams: | nsahsrlC1.a1 |
Description: | The HSRL laser still exhibits instability causing calibration uncertainty, especially for the beta_a (extinction profile), beta_a_backscatter (backscatter profile), and depol (depolarization ratio). Cloud and aerosol layer heights are quantitative and accurate however the calibrated quantities above have increased uncertainty. Nevertheless, the sensitivity of the HSRL in this degraded mode is still superior to other lidar on site (MPL and VCeil). The laser failed on 07/19/2013 at 22:30. |
Measurements: | nsahsrlC1.a1:
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