Data Quality Reports for Session: 111235 User: sbenson Completed: 03/22/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D070206.1TWP/SKYRAD/C2 - Short direct normaltwpskyrad20sC2.a0, twpskyrad60sC2.b1
D070404.2TWP/SKYRAD/C2 - IRT calibrationtwpskyrad60sC2.b1


DQRID : D070206.1
Start DateStart TimeEnd DateEnd Time
01/31/2007022302/10/20070055
Subject:
TWP/SKYRAD/C2 - Short direct normal
DataStreams:twpskyrad20sC2.a0, twpskyrad60sC2.b1
Description:
The short_direct_normal (NIP) data are missing or incorrect due to instrument cable 
failure.  The cable was replaced.

The short_direct_normal can be calculated using the following relationship for shortwave 
radiometers:
global hemispheric = diffuse hemispheric + direct normal *cos (zenith angle)
Measurements:twpskyrad60sC2.b1:
  • Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
  • Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
  • Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
  • Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
twpskyrad20sC2.a0:
  • Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
    Voltage(inst_direct_normal)

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DQRID : D070404.2
Start DateStart TimeEnd DateEnd Time
12/04/2006212002/22/20070125
Subject:
TWP/SKYRAD/C2 - IRT calibration
DataStreams:twpskyrad60sC2.b1
Description:
The IRT was not properly calibrated and was not able to measure sky temperatures below 
273.2 K. (This instrument was the same one damaged by lightning in November 2005 in Darwin. 
It was returned for repair and received a new lens but was calibrated only down to 0 deg 
C, so the problem was neither detected nor repaired.) The IRT was replaced on 2/22/2007.
Measurements:twpskyrad60sC2.b1:
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)
  • Sky Infra Red Temperature Maxima(sky_ir_temp_max)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)

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