Data Quality Reports for Session: 136210 User: kirstie Completed: 07/18/2011

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D080222.3NSA/SKYRAD/C1 - IRT mirror heater failurensaskyrad20sC1.a0, nsaskyrad60sC1.b1
D080418.1NSA/SKYRAD/C1 - Direct and Diffuse incorrectnsaskyrad20sC1.a0, nsaskyrad60sC1.b1
D080630.1NSA/SKYRAD/C1 - Tracker inoperativensaskyrad20sC1.a0, nsaskyrad60sC1.b1
D080904.5NSA/GNDRAD/C1 - Upwelling PIR ventilator fan failurensagndrad20sC1.a0, nsagndrad60sC1.b1


DQRID : D080222.3
Start DateStart TimeEnd DateEnd Time
12/16/2007000002/11/20081135
Subject:
NSA/SKYRAD/C1 - IRT mirror heater failure
DataStreams:nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
Description:
The heater of the IRT gold mirror failed due to a broken wire (that probably occurred on 
12/13 during maintenance of the solar tracker) allowing snow and frost to accumulate on 
the mirror until it was cleared during daily preventative maintenance. The problem was 
corrected when the heater wires were replaced.
Measurements:nsaskyrad60sC1.b1:
  • sky_ir_temp_min
  • sky_ir_temp_std
  • sky_ir_temp_max
  • Temperature, Sky Infra-Red(sky_ir_temp)
nsaskyrad20sC1.a0:
  • inst_sky_ir_signal

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DQRID : D080418.1
Start DateStart TimeEnd DateEnd Time
04/17/2008063204/23/20081815
Subject:
NSA/SKYRAD/C1 - Direct and Diffuse incorrect
DataStreams:nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
Description:
The short_direct_normal (NIP) instrument and cable were damaged by tracker rewind 
malfunction. Tracker and NIP replaced on 4/22 2200GMT but tracker not operational until 4/23 
1815GMT.  Thus, down_short_diffuse_hemisp (8-48) was not shaded 4/22 to 4/23.

Do not use 8-48 data from 4/22 to 4/23. NIP data is not recoverable during entire time but 
can be estimated using component sum for each 1 minute data: Direct = (global - 
diffuse)/cos(zenith angle)
Measurements:nsaskyrad60sC1.b1:
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
  • Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
  • short_direct_normal_std
  • down_short_diffuse_hemisp_std
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
nsaskyrad20sC1.a0:
  • inst_diffuse
  • inst_direct_normal

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DQRID : D080630.1
Start DateStart TimeEnd DateEnd Time
06/27/2008200006/30/20081740
Subject:
NSA/SKYRAD/C1 - Tracker inoperative
DataStreams:nsaskyrad20sC1.a0, nsaskyrad60sC1.b1
Description:
Tracker stopped working at this site during the time range specified. Reason for failure 
is unknown.  Tracker power cycled and restarted by maintenance 06/30 2008 1740 GMT.

The short_direct_normal (NIP) and down_short_diffuse_hemisp (8-48) data are bad during 
this time.  Data are not recoverable.
Measurements:nsaskyrad60sC1.b1:
  • Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
  • down_short_diffuse_hemisp_std
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
nsaskyrad20sC1.a0:
  • inst_diffuse
  • inst_direct_normal

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DQRID : D080904.5
Start DateStart TimeEnd DateEnd Time
07/20/2008033009/15/20081930
Subject:
NSA/GNDRAD/C1 - Upwelling PIR ventilator fan failure
DataStreams:nsagndrad20sC1.a0, nsagndrad60sC1.b1
Description:
The PIR exhibited a positive bias of approximately 6 W/m2 compared to the upwelling IRT 
due to ventilator fan failure.  Thus, the up_long_hemisp, data stream is high by about 6 
W/m2.    
   
Bias is not consistent and depends on atmospheric conditions. Either disregard the 
up_long_hemisp data or use the IRT for an estimate of the up_long_hemisp values during this time 
period.
Measurements:nsagndrad60sC1.b1:
  • inst_up_long_hemisp_dome_temp
  • inst_up_long_hemisp_tp
  • inst_up_long_hemisp_case_temp
  • up_long_hemisp_std
  • Radiation, longwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_long_hemisp)
  • Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Maxima(up_long_hemisp_max)
  • Upwelling Longwave Hemispheric Irradiance, Unventilated Pyrgeometer, Minima(up_long_hemisp_min)
nsagndrad20sC1.a0:
  • inst_up_long_hemisp_case_resist
  • inst_up_long_hemisp_tp
  • inst_up_long_hemisp_dome_resist

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