| DQR ID | Subject | Affected Data Streams | Data Quality Metric |
|---|---|---|---|
| D150123.10 | NSA/HSRL/C1 - Data not available | nsahsrlC1.a1 | Missing |
| D170512.3 | NSA/HSRL/C1 - Seed laser intermittent | nsahsrlC1.a1 | Incorrect |
| D130712.7 | NSA/HSRL/C1 - Degraded operation, laser instability, dirty window | nsahsrlC1.a1 | Suspect |
| D130712.5 | NSA/HSRL/C1 - Missing data | nsahsrlC1.a1 | Missing |
| D170303.4 | NSA/HSRL/C1 - Lost lock point | nsahsrlC1.a1 | Incorrect |
| D131025.2 | NSA/HSRL/C1 - Filter wheel problem | nsahsrlC1.a1 | Incorrect |
| D131024.1 | NSA/HSRL/C1 - Laser failure | nsahsrlC1.a1 | Incorrect |
| D130712.8 | NSA/HSRL/C1 - Laser instability | nsahsrlC1.a1 | Suspect |
| D130712.6 | NSA/HSRL/C1 - Instrument reinstallation | nsahsrlC1.a1 | Incorrect |
| D130712.4 | NSA/HSRL/C1 - Degraded operation | nsahsrlC1.a1 | Suspect |
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2014-12-12 | 17:20:00 | 2014-12-16 | 19:00:00 | Missing |
| Subject: | NSA/HSRL/C1 - Data not available |
|---|---|
| Affected Datastreams: | nsahsrlC1.a1 |
| Description | No data available during this period |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2017-05-01 | 03:00:00 | 2017-05-09 | 16:05:00 | Incorrect |
| Subject: | NSA/HSRL/C1 - Seed laser intermittent |
|---|---|
| Affected Datastreams: | nsahsrlC1.a1 |
| Description | The seed laser was acting intermittently during this period. This makes the bandwidth and frequency of the overall laser system unreliable, causing the system to no longer operate as a "high spectral resolution" lidar. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2012-10-13 | 00:00:00 | 2013-03-18 | 17:30:00 | Suspect |
| Subject: | NSA/HSRL/C1 - Degraded operation, laser instability, dirty window |
|---|---|
| Affected 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 |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2011-12-05 | 00:00:00 | 2012-10-08 | 23:59:00 | Missing |
| Subject: | NSA/HSRL/C1 - Missing data |
|---|---|
| Affected Datastreams: | nsahsrlC1.a1 |
| Description | Data are missing and unrecoverable. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2017-02-09 | 23:15:00 | 2017-02-10 | 15:34:00 | Incorrect |
| Subject: | NSA/HSRL/C1 - Lost lock point |
|---|---|
| Affected Datastreams: | nsahsrlC1.a1 |
| Description | Data are incorrect and should not be used. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2013-09-29 | 03:00:00 | 2013-09-30 | 14:25:00 | Incorrect |
| Subject: | NSA/HSRL/C1 - Filter wheel problem |
|---|---|
| Affected Datastreams: | nsahsrlC1.a1 |
| Description | An automated filter wheel failed to move properly and/or report position properly. These data are unusable. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2013-07-19 | 22:00:00 | 2013-09-15 | 22:00:00 | Incorrect |
| Subject: | NSA/HSRL/C1 - Laser failure |
|---|---|
| Affected Datastreams: | nsahsrlC1.a1 |
| Description | Starting at around 08:00 UTC on July 20, the HSRL laser output stopped. The laser was repaired by UW SSEC staff on Sept 10 but instrument work continued until Sept 15 22:00 UTC. All lidar profiles in this time period should be deemed "bad" and not used. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2013-03-18 | 17:30:00 | 2013-07-19 | 22:30:00 | Suspect |
| Subject: | NSA/HSRL/C1 - Laser instability |
|---|---|
| Affected 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 |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2012-10-09 | 00:00:00 | 2012-10-12 | 23:59:00 | Incorrect |
| Subject: | NSA/HSRL/C1 - Instrument reinstallation |
|---|---|
| Affected Datastreams: | nsahsrlC1.a1 |
| Description | Instrument was being reinstalled. Data are not valid, do not use. |
| Measurements |
|
| Start Date | Start Time | End Date | End Time | Data Quality Metric |
|---|---|---|---|---|
| 2011-04-08 | 00:00:00 | 2011-12-04 | 23:59:00 | Suspect |
| Subject: | NSA/HSRL/C1 - Degraded operation |
|---|---|
| Affected 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 |
|