DQRID : D001115.1
Start DateStart TimeEnd DateEnd Time
02/27/2000000006/07/20002359
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Subject:
SGP/MWR/B1 - occasional negative brightness temperatures
DataStreams:sgpmwrlosB1.a1, sgpmwrtipB1.00, sgpmwrlosB1.b1, sgpmwrtipB1.a1, sgpmwrlosB1.00
Description:
Occasional spikes in the MWR data were observed. Inspection of
the data indicates that these are due to spikes in the gain that result from
either unrealistically low values of the blackbody target temperature (~150 K) or
unrealistically low values of the microwave signal counts when viewing the
blackbody target. Unrealistically low values of the mixer temperature have also been
observed.
Suggestions: 
The problem appears to have resolved itself.
Measurements:sgpmwrlosB1.a1:
  • 31.4 GHz sky brightness temperature(31tbsky)
  • 23.8 GHz sky brightness temperature(23tbsky)
  • Total water vapor along LOS path(vap)
  • Averaged total liquid water along LOS path(liq)
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sgpmwrlosB1.00:
  • (Raw data stream - documentation not supported)
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sgpmwrtipB1.a1:
  • 31.4 GHz sky signal(tipsky31)
  • 23.8 GHz sky signal(tipsky23)
  • Mixer kinetic (physical) temperature(tkxc)
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sgpmwrlosB1.b1:
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Averaged total liquid water along LOS path(liq)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Total water vapor along LOS path(vap)
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sgpmwrtipB1.00:
  • (Raw data stream - documentation not supported)
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