DQRID : D080331.2
Start DateStart TimeEnd DateEnd Time Data Quality Metric
03/15/2007190007/13/20071900Incorrect
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Subject:
NSA/MWRP/C1 - V-band Noise diode failure
DataStreams:nsamwrpC1.b1
Description:
The LN2 calibration on 3/15 showed a large drift of the V-band calibration parameters. The 
radiometer was calibrated again in June and was sent out for repairs in July 2007.

Between 3/15 and 7/13 2007 the V-band data are incorrect and should be disregarded. The 
failure affects the retrieved vertical profiles of temperature and humidity as well.

Please note that the hardware failure affected the 7 V-band channels only (51-60 GHz). 
Channels in the frequency range between 20 and 30 GHz are not affected. Integrated liquid 
water (LWP) and water vapor (PWV) are not affected since they use K-band channels only.
Suggestions: 
Measurements:nsamwrpC1.b1:
  • relativeHumidity
  • waterVaporMixingRatio
  • virtualTemperature
  • brightnessTemperature
  • waterVaporDensity
  • temperature
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