Data Quality Reports for Session: 146289 User: vmanoharan Completed: 11/29/2012


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D120507.1PGH/NFOV/M1 - Instrument noise/interferencepghnfov2chM1.b1
D121029.2PGH/GNDRAD/M1 - Reprocess: Incorrect calibrationspghgndrad20sM1.a0, pghgndrad60sM1.b1


DQRID : D120507.1
Start DateStart TimeEnd DateEnd Time
06/22/2011000001/23/20121200
Subject:
PGH/NFOV/M1 - Instrument noise/interference
DataStreams:pghnfov2chM1.b1
Description:
When the signals are very low, a regular feature can be seen in the data.  It begins on 
the hour, and lasts for ~20 minutes.  This feature is a rise in the signal of 0.25 to 0.33 
mV.  It is small even when compared with the NFOV's typically small signals.  

My initial hunch is the NFOV is located next to or nearby equipment that 
operates/broadcasts/etc beginning on the hour, and lasting for ~20 minutes.

Looking (very closely) back at the previous deployment, this regular signal bump is also 
evident, so it seems the equipment contaminating the NFOV is part of the AMF1, and not 
unique to this deployment.  20111222 is a good example of the issue.
Measurements:pghnfov2chM1.b1:
  • raw_counts_673nm
  • raw_counts_870nm
  • Calibrated Zenith Radiance, 673nm(radiance_673nm)
  • Calibrated Zenith Radiance, 870nm(radiance_870nm)


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DQRID : D121029.2
Start DateStart TimeEnd DateEnd Time
06/09/2011103303/31/20122359
Subject:
PGH/GNDRAD/M1 - Reprocess: Incorrect calibrations
DataStreams:pghgndrad20sM1.a0, pghgndrad60sM1.b1
Description:
During the entire India deployment the Gndrad system was configured with incorrect 
calibration coefficients for the shortwave instruments. The program hadn't been updated since 
the previous deployment in the Azores.

The instrument mentor, site personal and OSS support have attempted to best determine the 
serial numbers of instruments installed at PGH during the deployment period.  The 
following instrument data will need to be reprocessed with the following correction multipliers:
PIR-UIR(up_long_hemisp): OK, no correction required
PSP-US (up_short_hemsip): 117.97(correct)/129.42(incorrect) = 0.91153
IRT: calibration should be validated by instrument mentor (Vic Morris): mult=25, 
offset=223.2

Correct serial numbers:
PSP-US (up_short_hemsip): 33941F3
Measurements:pghgndrad20sM1.a0:
  • inst_up_short_hemisp
  • inst_sfc_ir_signal

pghgndrad60sM1.b1:
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • sfc_ir_temp_std
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Radiation, shortwave, at 10-m height, upwelling hemispheric irrad., 1-min avg(up_short_hemisp)
  • Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Maxima(up_short_hemisp_max)
  • Upwelling Shortwave Hemispheric Irradiance, Unventilated Pyranometer, Minima(up_short_hemisp_min)
  • up_short_hemisp_std
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)


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