DQRID : D150619.4
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/12/2015230006/15/20152330Incorrect
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Subject:
MAO/DL/M1 - Banding artifacts in the SNR
DataStreams:maodlppiM1.b1, maodlfptM1.b1, maodlusrM1.b1, maodlrhi2M1.b1, maodlcal2M1.b1,
maodlcal1M1.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.
Suggestions: 
Avoid using the intensity and backscatter fields during the period in question. The 

radial velocity data should be used with caution.
Measurements:maodlppiM1.b1:
  • attenuated_backscatter
  • intensity
  • radial_velocity
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maodlrhi2M1.b1:
  • attenuated_backscatter
  • intensity
  • radial_velocity
more
maodlfptM1.b1:
  • radial_velocity
  • attenuated_backscatter
  • intensity
more
maodlcal1M1.b1:
  • radial_velocity
  • attenuated_backscatter
  • intensity
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maodlusrM1.b1:
  • attenuated_backscatter
  • radial_velocity
  • intensity
more
maodlcal2M1.b1:
  • intensity
  • radial_velocity
  • attenuated_backscatter
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