DQRID : D090114.2
Start DateStart TimeEnd DateEnd Time
12/09/2008000012/09/20081800
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Subject:
NSA/MWR/C1 - Incorrect brightness temperatures and retrievals
DataStreams:nsamwrlosC1.b1, nsa5mwravgC1.c1, nsamwrtipC1.a1
Description:
The brightness temperatures and retrieved PWV and LWP show a sudden jump and have values 
that are too high. The suddenly jump back to normal at around 1800 UTC. All other 
parameters seem reasonable so the cause of the jump may just be due to accumulation of either 
snow or melting ice on the radome.
Suggestions: 
Data between 00 and 1800 UTC should be disregarded
Measurements:nsamwrtipC1.a1:
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • Ambient temperature(tkair)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
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nsa5mwravgC1.c1:
  • Total water vapor along LOS path(vap)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Averaged total liquid water along LOS path(liq)
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nsamwrlosC1.b1:
  • Averaged total liquid water along LOS path(liq)
  • Ambient temperature(tkair)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Total water vapor along LOS path(vap)
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