DQRID : D121018.5
Start DateStart TimeEnd DateEnd Time Data Quality Metric
10/14/2011180012/17/20130100Incorrect
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Subject:
TWP/KASACR/C3 - Reprocess: Mean Doppler Velocity sign reversed
DataStreams:twpkasacrslrC3.a1, twpkasacrrhiC3.a1, twpkasacrhsrhiC3.a1, twpkasacrppiC3.a1,
twpkasacrawrhiC3.a1, twpkasacrcwrhiC3.a1, twpkasacrspeccmaskcopolC3.a0,
twpkasacrspeccmaskxpolC3.a0, twpkasacrvptC3.a1, twpkasacrblrhiC3.a1
Description:
The signs of the mean_doppler_velocity field values are incorrect. The ARM convention for 
this field is that positive velocities indicate motion away from the radar.  However, the 
velocity data in these files have their signs reversed, so that motion TOWARD the radar 
has a positive sign.
Suggestions: 
Multipy the mean_doppler_velocity values by -1 prior to using the data.  This will 

result in motion away from the radar having a positive sign.
Measurements:twpkasacrppiC3.a1:
  • mean_doppler_velocity
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twpkasacrblrhiC3.a1:
  • mean_doppler_velocity
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twpkasacrcwrhiC3.a1:
  • mean_doppler_velocity
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twpkasacrvptC3.a1:
  • mean_doppler_velocity
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twpkasacrspeccmaskcopolC3.a0:
  • mean_doppler_velocity
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twpkasacrawrhiC3.a1:
  • mean_doppler_velocity
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twpkasacrspeccmaskxpolC3.a0:
  • mean_doppler_velocity
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twpkasacrrhiC3.a1:
  • mean_doppler_velocity
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twpkasacrslrC3.a1:
  • mean_doppler_velocity
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twpkasacrhsrhiC3.a1:
  • mean_doppler_velocity
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