Data Quality Report for Order ID: 187823
User ID: santosd1    Date completed: 2017-09-20
All DQRs
DQR ID Subject Affected Data Streams Data Quality Metric
D150904.2 MAO/DL/M1 - Instrument removed from service for repair maodlcal1M1.b1 Missing
D150922.4 MAO/DL/M1 - Missing Data maodlppiM1.b1 Note
D150619.4 MAO/DL/M1 - Banding artifacts in the SNR maodlcal2M1.b1 Incorrect
 
DQR ID: D150904.2    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2015-08-28 02:00:00 2015-12-31 23:59:59 Missing
Subject: MAO/DL/M1 - Instrument removed from service for repair
Affected Datastreams: maodlcal1M1.b1
Description The AMF1 Doppler lidar was taken offline and packed for shipping to the vendor (Halo Photonics) on 28 August. Engineers at Halo will preform repairs and upgrades to the instrument. Data from the instrument will not be available for the remainder of the current AMF1 deployment in Brazil.
Measurements
  • time_offset (Time offset from base_time)
  • time (Time offset from midnight)
  • elevation (Beam elevation)
  • intensity (Intensity (signal to noise ratio + 1))
  • qc_time (Quality check results on field: Time offset from midnight)
  • base_time (Base time in Epoch)
  • azimuth (Azimuth relative to true north)
  • qc_radial_velocity (Quality check results on field: Radial velocity)
  • lat (North latitude)
  • alt (Altitude above mean sea level)
  • lon (East longitude)
  • attenuated_backscatter (Attenuated backscatter)
  • radial_velocity (Radial velocity)
  • range (Distance from Lidar to center of range gate)
 
DQR ID: D150922.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2015-04-19 15:00:00 2015-08-28 02:00:00 Note
Subject: MAO/DL/M1 - Missing Data
Affected Datastreams: maodlppiM1.b1
Description The DL suffered from numerous outages during this period. Some of these periods are longer than 24 hours while many are less. The DL was sent off for repairs on 8/28 and will not be deployed again at MAO.
Measurements
  • intensity (Intensity (signal to noise ratio + 1))
  • attenuated_backscatter (Attenuated backscatter)
  • radial_velocity (Radial velocity)
 
DQR ID: D150619.4    (Back to Top)
Start Date Start Time End Date End Time Data Quality Metric
2015-05-12 23:00:00 2015-06-15 23:30:00 Incorrect
Subject: MAO/DL/M1 - Banding artifacts in the SNR
Affected Datastreams: maodlcal2M1.b1
Description Time height displays of the intensity (SNR+1) and backscatter fields exhibit obvious horizontal banding artifacts. The bands are regions where the SNR goes negative - which isn't physical. The problem was caused by a glitch in the noise whitening procedure. The problem was fixed when the driver for the data acquisition card was updated. The radial velocities do not exhibit obvious banding; however, they were likely affected in some way.
Measurements
  • intensity (Intensity (signal to noise ratio + 1))
  • attenuated_backscatter (Attenuated backscatter)
  • radial_velocity (Radial velocity)