DQRID : D101109.1
Start DateStart TimeEnd DateEnd Time
09/21/2010000011/15/20102113
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Subject:
NSA/MWRP/C1 - Reprocessed: Incorrect calibration
DataStreams:nsamwrpC1.b1
Description:
The calibration of the MWRP drifted starting on September 21. The drift caused a negative 
LWP. On 10/21 I modified the calibration of the 30 GHz channel in an attempt to correct 
for the negative bias in LWP. The change in the calibration however caused an excessive 
increase in the PWV retrievals. The original calibration values were reinstated on 10/29. I 
then recomputed the temperature coefficients as well as the noise diode injection 
temperature from tip curves and uploaded the new values on Nov 15 2010. 

Reprocess the data from 9/21 to 11/15 with the newly computed coefficients.

Reprocessing completed 20110111.
Suggestions: 
Use reprocessed data
Measurements:nsamwrpC1.b1:
  • Derived relative humidity(relativeHumidity)
  • Retrieved cloud liquid water content(liquidWaterContent)
  • Interpolated water vapor mixing ratio(waterVaporMixingRatio)
  • Microwave brightness temperature(brightnessTemperature)
  • Total precipitable water vapor, from microwave radiometer(totalPrecipitableWater)
  • Retrieved total precipitable water vapor using only 23.835 and 30.0 GHz(totalPrecipitableWater2)
  • Retrieved water vapor density(waterVaporDensity)
  • Retrieved liquid water path(liquidWaterPath)
  • Retrieved liquid water path using only 23.835 and 30.0 GHz(liquidWaterPath2)
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