DQRID : D030115.1
Start DateStart TimeEnd DateEnd Time
04/25/2002193005/27/20021200
more
Subject:
NSA/MWR/C1 - Reprocess: Wrong Calibration
DataStreams:nsamwrlosC1.a1, nsamwrtipC1.a1
Description:
When MWR#20 was returned to service on 4/25/02, the calibration had  significantly changed 
as a result of the repairs made by Radiometrics. I hoped that the previous calibration 
was close enough to serve as a start of the iterative self-calibration process, but I was 
wrong. After several days and very little clear sky, no valid tip curves were obtained 
and the values of vap and liq continued to be too large and unrealistic (resulting in the 
"******" for these values in the raw file). Radiometrics finally provided the calibration 
they obtained after the repair and these values were put in the configuration file on 
5/23/02. The instrument was then  able to obtain valid tip curves and derive a new calibration.
Suggestions: 
null
Measurements:nsamwrlosC1.a1:
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Averaged total liquid water along LOS path(liq)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Total water vapor along LOS path(vap)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
more
nsamwrtipC1.a1:
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
more

Close this window