DQRID : D050915.1
Start DateStart TimeEnd DateEnd Time
07/28/2005140008/05/20051700
more
Subject:
SGP/MWR/C1 - Instrument noise problem
DataStreams:sgp1mwravgC1.c1, sgp5mwravgC1.c1, sgpmwrtipC1.a1, sgpmwrlosC1.b1
Description:
Various variables including the mixer temperatures were very noisy. After several attempts 
to fix the problem, the instrument was taken off line and returned to the manufacturer 
for repair.
Suggestions: 
Measurements:sgp5mwravgC1.c1:
  • Standard deviation about the mean for the IR brightness temperature(ir_temp_sdev)
  • Averaged total liquid water along LOS path(liq)
  • Flag indicating where the initial surface water measurements are from: 0-> SMOS,
    1-> AERI(water_flag)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Total water vapor along LOS path(vap)
  • Standard deviation about the mean for the 31.4 GHz sky brightness temperature(tbsky31_sdev)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Fraction of data in averaging interval with water on Teflon window(water_flag_fraction)
  • IR Brightness Temperature(ir_temp)
  • Probability of outlier in ratio of averaged brightness temps(prob_outlier)
  • Probability of slope change in ratio of averaged brightness temps(prob_slope_change)
  • 31.4 GHz sky brightness temperature(31tbsky)
  • 23.8 GHz sky brightness temperature(23tbsky)
  • Probability of level change in ratio of averaged brightness temps(prob_level_change)
  • Standard deviation about the mean for the 23.8 GHz sky brightness temperature(tbsky23_sdev)
  • Standard deviation about the mean for the total water vapor amount(vap_sdev)
  • Number of data points averaged out of 15(number_obs_averaged)
  • Standard deviation about the mean for the total liquid water amount(liq_sdev)
more
sgp1mwravgC1.c1:
  • Number of contiguous periods in averaging interval flagged by Dynamic Linear Mo(dlm_flag_periods)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • Fraction of data in averaging interval flagged by Dynamic Linear Model as poten(dlm_flag_fraction)
  • Standard deviation about the mean for the 31.4 GHz sky brightness temperature(tbsky31_sdev)
  • Standard deviation about the mean for the total liquid water amount(liq_sdev)
  • Standard deviation about the mean for the 23.8 GHz sky brightness temperature(tbsky23_sdev)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • IR Brightness Temperature(ir_temp)
  • 23.8 GHz sky brightness temperature(23tbsky)
  • Standard deviation about the mean for the total water vapor amount(vap_sdev)
  • Fraction of data in averaging interval with water on Teflon window(water_flag_fraction)
  • 31.4 GHz sky brightness temperature(31tbsky)
  • Standard deviation about the mean for the IR brightness temperature(ir_temp_sdev)
  • Total water vapor along LOS path(vap)
  • Number of contiguous periods in averaging interval with water on Teflon window(water_flag_periods)
  • Averaged total liquid water along LOS path(liq)
more
sgpmwrtipC1.a1:
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • 23.8 GHz Blackbody signal(bb23)
  • Noise injection temp at 31.4 GHz derived from this tip(tnd31I)
  • Noise injection temp at 23.8 GHz derived from this tip(tnd23I)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Mixer kinetic (physical) temperature(tkxc)
  • 23.8 GHz sky signal(tipsky23)
  • (tknd)
  • 31.4 GHz sky brightness temperature derived from tip curve(tbsky31tip)
  • 23.8 GHz goodness-of-fit coefficient(r23)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • 31.4 GHz blackbody(bb31)
  • Blackbody kinetic temperature(tkbb)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • 31.4 GHz sky signal(tipsky31)
  • Correlation coefficients for tip curve at 31.4 GHz(r31)
  • Total liquid water along zenith path using tip-derived brightness temperatures(liqtip)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Ambient temperature(tkair)
  • 23.8 GHz sky brightness temperature derived from tip curve(tbsky23tip)
  • Total water vapor along zenith path using tip-derived brightness temperatures(vaptip)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
more
sgpmwrlosC1.b1:
  • 23.8 GHz sky signal(sky23)
  • Temperature correction coefficient at 23.8 GHz(tc23)
  • Water on Teflon window (1=WET, 0=DRY)(wet_window)
  • Blackbody kinetic temperature(tkbb)
  • Noise injection temp at nominal temperature at 31.4 GHz(tnd_nom31)
  • Temperature correction coefficient at 31.4 GHz(tc31)
  • Mean 31.4 GHz sky brightness temperature(tbsky31)
  • 31.4 GHz blac2body+noise injection signal(bbn31)
  • Noise injection temp at nominal temperature at 23.8 GHz(tnd_nom23)
  • Mixer kinetic (physical) temperature(tkxc)
  • Mean 23.8 GHz sky brightness temperature(tbsky23)
  • Noise injection temp at 23.8 GHz adjusted to tkbb(tnd23)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • 23.8 GHz blackbody+noise injection signal(bbn23)
  • Ambient temperature(tkair)
  • Total water vapor along LOS path(vap)
  • 31.4 GHz blackbody(bb31)
  • Averaged total liquid water along LOS path(liq)
  • Noise injection temp at 31.4 GHz adjusted to tkbb(tnd31)
  • 23.8 GHz Blackbody signal(bb23)
  • (tknd)
  • 31.4 GHz sky signal(sky31)
more

Close this window