DQRID : D090115.2
Start DateStart TimeEnd DateEnd Time
12/07/2008000012/29/20080000
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Subject:
SGP/MWR/B4 - Occasional spikes in data
DataStreams:sgpmwrtipB4.a1, sgpmwrlosB4.b1
Description:
Between 12/7 and 12/29 the 23.8-GHz brightness temperature was affected by the presence of 
spikes due to interference that was more active between 12/7 and 12/15 and then 
diminished. The spikes affect the PWV and the LWP as well.

Spikes happen two or three times a day. Review the data to determine where the spikes 
happen and disregard or filter out the affected points.
Suggestions: 
Measurements:sgpmwrtipB4.a1:
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbskytip23)
  • 31.8 GHz sky brightness temperature derived from tip curve(tbskytip31)
more
sgpmwrlosB4.b1:
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Total water vapor along LOS path(vap)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Averaged total liquid water along LOS path(liq)
more

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