DQRID : D071221.2
Start DateStart TimeEnd DateEnd Time
05/12/2007103001/02/20082240
more
Subject:
SGP/SIRS/E18 - Instrument noise problem
DataStreams:sgpsirs20sE18.a0, sgpsirsE18.b1
Description:
Starting May 12th 2007 DIR experiencing persistent, intermittent data dropouts and noise.  
PM found a damaged PIR cable and repaired 01/02/08 2240GMT. 

Noise seems to be unbiased and dropouts are beyond QC limits making QC flags a possible 
option in filtering for good data. However, using data during this period is not 
recommended.
Suggestions: 
Measurements:sgpsirs20sE18.a0:
  • Instantaneous downwelling pyrgeometer thermopile voltage, shaded pyrgeometer(inst_down_long_hemisp_shaded_tp)
  • Instantaneous downwelling pyrgeometer dome thermistor resistance, shaded
    pyrgeometer(inst_down_long_shaded_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer(inst_down_long_shaded_case_resist)
more
sgpsirsE18.b1:
  • Downwelling longwave hemispheric net infrared(down_long_netir)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • Downwelling longwave hemispheric irradiance, shaded pyrgeometer, standard
    deviation(down_long_hemisp_shaded_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Downwelling longwave hemispheric irradiance, shaded pyrgeometer(down_long_hemisp_shaded)
more

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