DQRID : D080828.1
Start DateStart TimeEnd DateEnd Time
10/01/2008000010/06/20081500
10/20/2008000010/23/20082359
09/06/2008000009/26/20082359
10/16/2008020110/16/20082359
more
Subject:
HFE/MWR/M1 - Insufficient calibration stability
DataStreams:hfemwrtipM1.a1, hfemwrlosM1.b1
Description:
The noise diode temperature suddenly jumped to > 60 C after a power outage. Following 
additional power problems the noise diode injection temperature drifted fast and the 
radiometer was not able to calibrate properly.

Data during the indicated time periods are poorly calibrated and sometimes erratic. Users 
should be aware that the accuracy of the measurements is dramatically degraded. 

Users can use the microwave profiler (MWRP) data to supplement the MWR data.
Suggestions: 
Measurements:hfemwrtipM1.a1:
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • (tknd)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
  • Mixer kinetic (physical) temperature(tkxc)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
more
hfemwrlosM1.b1:
  • Mixer kinetic (physical) temperature(tkxc)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • (tknd)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Averaged total liquid water along LOS path(liq)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Total water vapor along LOS path(vap)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
more

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