Data Quality Reports for Session: 133036 User: chris1wils Completed: 02/07/2011


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D071022.4SGP/SIRS/C1 - Sensor Cable ProblemsgpsirsC1.b1, sgpsirs20sC1.a0


DQRID : D071022.4
Start DateStart TimeEnd DateEnd Time
10/03/2007140004/22/20082052
Subject:
SGP/SIRS/C1 - Sensor Cable Problem
DataStreams:sgpsirsC1.b1, sgpsirs20sC1.a0
Description:
Beginning October 3, 2007, the upwelling longwave irradiance (up_long_hemisp, aka "UIR") 
started to spike to unreasonable values positively offset from the co-located E13 by over 
100W/m2.  On January 17 2008 the UIR values become consistently bad due to bad UIR dome 
thermistor wiring.  Problem appears as a resistive offset in the dome thermistor but due 
to nature of failure (unknown cable problem) data correction would not yield any better 
data than the co-located E13 UIR instrument that is known to be operating correctly.  
Instrument cable replacement on 4/22 fixed the problem.

Thermopile data (netIR) from this instrument is good.  However, Incoming irradiance data 
is not correctable due to bad UIR dome thermistor wiring within the instrument cable.
Measurements:sgpsirs20sC1.a0:
  • inst_up_long_dome_resist
  • inst_up_long_case_resist
  • inst_up_long_hemisp_tp

sgpsirsC1.b1:
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
  • Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
  • Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
  • Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
  • up_long_hemisp_std


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