DQRID : D090923.3
Start DateStart TimeEnd DateEnd Time
09/10/2009135710/28/20091315
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Subject:
SGP/SIRS/E3 - Multiplexer problem
DataStreams:sgpsirsE3.b1, sgpsirs20sE3.a0
Description:
The down_short_hemisp, down_long_shaded_hemisp and up_long_hemisp values drop out and 
spike during this time period due to a failing multiplexer. The problem was progressive and 
after 9/19 the mux had completely failed and those values go completely missing.  

The problem was not resolved since the site was scheduled for decommissioning. Preventive 
maintenance was ended as of Oct 1 2009. The instrument was removed from service 20091028.
Suggestions: 
Data are not recoverable and are bad until the end of the datastream.
Measurements:sgpsirs20sE3.a0:
  • Instantaneous Upwelling Pyrgeometer Dome Thermistor Resistance Pyrgeometer(inst_up_long_dome_resist)
  • Instantaneous Upwelling Pyrgeometer Thermopile Pyrgeometer(inst_up_long_hemisp_tp)
  • Instantaneous Downwelling Hemispheric Shortwave, Pyranometer Thermopile Voltage(inst_global)
  • 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)
  • Instantaneous Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist)
  • Instantaneous downwelling pyrgeometer thermopile voltage, shaded pyrgeometer(inst_down_long_hemisp_shaded_tp)
more
sgpsirsE3.b1:
  • Upwelling longwave hemispheric irradiance, pyrgeometer, maxima(up_long_hemisp_max)
  • Instantaneous Dome Temperature(inst_up_long_dome_temp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • Instantaneous upwelling pyrgeometer case thermistor temperature, pyrgeometer(inst_up_long_case_temp)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Standard Deviation(up_long_hemisp_std)
  • Downwelling shortwave hemispheric irradiance, pyranometer, maxima(down_short_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Downwelling longwave hemispheric irradiance, shaded pyrgeometer, standard
    deviation(down_long_hemisp_shaded_std)
  • Upwelling Longwave Hemispheric Irradiance, Pyrgeometer, Minima(up_long_hemisp_min)
  • Instantaneous Upwelling Longwave Hemispheric Irradiance, Pyrgeometer(up_long_netir)
  • Down-welling unshaded pyranometer voltage(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Minima(down_short_hemisp_min)
  • Instantaneous downwelling pyrgeometer case thermistor temperature, shaded
    pyrgeometer(inst_down_long_shaded_case_temp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded
    Pyrgeometer(inst_down_long_shaded_dome_temp)
  • Downwelling longwave hemispheric irradiance, shaded pyrgeometer(down_long_hemisp_shaded)
  • Downwelling longwave hemispheric net infrared(down_long_netir)
  • 10 meter Upwelling Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)
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