Data Quality Reports for Session: 117154 User: lindsay1m1 Completed: 01/23/2009

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D060424.1SGP/SIRS/E21 - Roosting birds in field of viewsgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1
D060508.1SGP/SIRS/E16 - NIP Instrument Failuresgpsirs20sE16.a0, sgpsirsE16.b1


DQRID : D060424.1
Start DateStart TimeEnd DateEnd Time
04/07/2006120005/31/20061700
Subject:
SGP/SIRS/E21 - Roosting birds in field of view
DataStreams:sgpsirs20sE21.a0, sgpsirsE21.00, sgpsirsE21.b1
Description:
The RBDD (Rotating Bird Deterrent Device) installed at E21 to prevent turkey vultures from 
roosting on the instrument boom failed resulting in noisy NIP (Short Direct Normal) and 
PSP (Short Global Hemispheric) data and a spike occurring around 2230 UTC everyday due to 
obstruction of the field of view.

Problem is intermittant due to moving birds.  Use data with discretion.  Follow ARM 
(DQMS3) flag recommendations for QC flags 02 or 03 found in section 5.1.4 of the SIRS handbook:
http://www.arm.gov/publications/tech_reports/handbooks/sirs_handbook.pdf
Measurements:sgpsirsE21.00:
  • null(Raw data stream - documentation not supported)
sgpsirs20sE21.a0:
  • Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
    Voltage(inst_global)
  • Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
    Voltage(inst_direct_normal)
sgpsirsE21.b1:
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • Down-welling unshaded pyranometer voltage(down_short_hemisp)
  • 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)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
    Deviation(down_short_hemisp_std)

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DQRID : D060508.1
Start DateStart TimeEnd DateEnd Time
04/28/2006154305/12/20061608
Subject:
SGP/SIRS/E16 - NIP Instrument Failure
DataStreams:sgpsirs20sE16.a0, sgpsirsE16.b1
Description:
The short_direct_normal dropped below MIN value on 4/28/06 resulting in failure of the 
up_long_hemisp started 3-component test.  No data are available from 20060428.1900 through 
20060503.21:39.  When the data returned, the short_direct normal fluctuated wildly 
throughout the day, and down_long_hemisp & up_long_hemisp failed the 3-component test.  
Technicians determined the NIP had failed and replaced it 5/12.

Use component method ((global - diffuse)/cos(ZA)) to calculate direct normal. For more 
information on this summation method please see section 7.2 (Theory of Operation) of the 
SIRS Handbook:
http://www.arm.gov/publications/tech_reports/handbooks/sirs_handbook.pdf
Measurements:sgpsirsE16.b1:
  • Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
  • 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)
sgpsirs20sE16.a0:
  • Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
    Voltage(inst_direct_normal)

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