Data Quality Reports for Session: 153330 User: kimhy Completed: 10/01/2013


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D120913.1PVC/SKYRAD/M1 - Intake Fan Failurepvcskyrad20sM1.a0, pvcskyrad60sM1.b1
D121008.1PVC/SKYRAD/M1 - Reprocessed: Incorrect calibration coefficientspvcskyrad20sM1.a0, pvcskyrad60sM1.b1
D121018.10PVC/SKYRAD/M1 - Reprocess: Incorrect IRT Configurationpvcskyrad60sM1.b1
D121024.3PVC/SKYRAD/M1 - IRT failurepvcskyrad20sM1.a0, pvcskyrad60sM1.b1
D121024.5PVC/SKYRAD/M1 - IRT scale factorpvcskyrad20sM1.a0, pvcskyrad60sM1.b1
D121128.4PVC/SKYRAD/M1 - Instrument noisepvcskyrad60sM1.b1, pvcskyrad20sM1.a0
D121217.8PVC/SKYRAD/M1 - IRT disconnectedpvcskyrad60sM1.b1
D130227.6PVC/SKYRAD/M1 - Tracker removed for stormpvcskyrad20sM1.a0, pvcskyrad60sM1.b1


DQRID : D120913.1
Start DateStart TimeEnd DateEnd Time
06/25/2012000008/28/20122045
Subject:
PVC/SKYRAD/M1 - Intake Fan Failure
DataStreams:pvcskyrad20sM1.a0, pvcskyrad60sM1.b1
Description:
PSP (down_short_hemisp) ventilator fan failed from start of PVC deployment.  Site ops 
repaired/replaced on 8/28. Instrument data are not recoverable.

The down_short_hemisp data are not recoverable but can be re-constructed using the 
short_direct_normal and down_short_diffuse_hemispheric measurements and the following formula: 

Global = Direct * cos(zenith angle) + Diffuse
Measurements:pvcskyrad20sM1.a0:
  • inst_global

pvcskyrad60sM1.b1:
  • Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • down_short_hemisp_std


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DQRID : D121008.1
Start DateStart TimeEnd DateEnd Time
06/25/2012000009/05/20122000
Subject:
PVC/SKYRAD/M1 - Reprocessed: Incorrect calibration coefficients
DataStreams:pvcskyrad20sM1.a0, pvcskyrad60sM1.b1
Description:
Incorrect programs were used in Skyrad since PVC deployment period began.  The Skyrad 
program was corrected 09/05/2012 approx 20:00GMT. Reprocessing will be required of all 
instruments at this station except the IRT. This will require applying the following 
corrections for the time range specified. 
Serial numbers(incorrectly applied): 
PIR1-DIR: 34306
PIR2-DIR: 34303
Diffuse PSP: 34284
NIP: 34097
PSP-DS: 34293

Serial numbers(correct): 
PIR1-DIR: 34303
PIR2-DIR: 34306
Diffuse PSP: 35751
NIP: 37285
PSP-DS: 37302
    
Data: 
Longwave requires reprocessing using the 20second datastream and applying the following k1 
coefficients (note: the longwave instruments were swapped according to datalogger).
down_long_hemisp1 (old cal) = 0.23041
down_long_hemisp1 (corr cal) = 0.24750
down_long_hemisp2 (old cal) = 0.24750
down_long_hemisp2 (corr cal) = 0.23041

Shortwave only requires application of the following corrections to 1min and 20 second 
data.
down_short_diffuse_hemisp(corr) = down_short_diffuse_hemisp(old value)*(104.45(corr 
cal)/120.91(incorr cal))
short_direct_normal(corr) = short_direct_normal(old value)*(117.25(new cal)/124.97(incorr 
cal))
up_short_hemip(corr) = up_short_hemip(old value)*(119.21(new cal)/108.48(incorr cal))

Contact radiometer mentor with any comments/questions

Reprocessing completed 20121217
Measurements:pvcskyrad20sM1.a0:
  • inst_down_long_hemisp1_case_resist
  • inst_global
  • inst_diffuse
  • inst_direct_normal
  • inst_down_long_hemisp2_case_resist
  • inst_down_long_hemisp2_dome_resist
  • inst_down_long_hemisp1_dome_resist
  • inst_down_long_hemisp1_tp
  • inst_down_long_hemisp2_tp

pvcskyrad60sM1.b1:
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • down_long_hemisp2_std
  • Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
  • inst_down_long_hemisp2_case_temp
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
  • Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • inst_down_long_hemisp2_tp
  • down_long_hemisp1_max
  • down_long_hemisp2_min
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
  • down_long_hemisp1_std
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
  • down_short_diffuse_hemisp_std
  • short_direct_normal_std
  • down_long_hemisp2_max
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • down_short_hemisp_std
  • inst_down_long_hemisp2_dome_temp
  • inst_down_long_hemisp1_case_temp
  • inst_down_long_hemisp1_dome_temp
  • down_long_hemisp1_min
  • inst_down_long_hemisp1_tp


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DQRID : D121018.10
Start DateStart TimeEnd DateEnd Time
06/29/2012224010/18/20121259
Subject:
PVC/SKYRAD/M1 - Reprocess: Incorrect IRT Configuration
DataStreams:pvcskyrad60sM1.b1
Description:
The SKYRAD IRT was installed temporarily (waiting for the new enclosure) in
a vertical orientation, without the use of the gold mirror. When irt_comm
was started, the emissivity parameter in the startup file was not changed to 1.000 
compensate for the absence of the mirror, resulting in a positive bias of about 5 K.

These data may be corrected by adjusting the radiance values for the difference in 
emmissivity.
Measurements:pvcskyrad60sM1.b1:
  • sky_ir_temp_min
  • IR Brightness Temperature(sky_ir_temp)
  • sky_ir_temp_max


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DQRID : D121024.3
Start DateStart TimeEnd DateEnd Time
10/01/2012055010/12/20121459
Subject:
PVC/SKYRAD/M1 - IRT failure
DataStreams:pvcskyrad20sM1.a0, pvcskyrad60sM1.b1
Description:
The IRT failed because of water intrusion.
Measurements:pvcskyrad20sM1.a0:
  • inst_sky_ir_signal

pvcskyrad60sM1.b1:
  • sky_ir_temp_std
  • sky_ir_temp_min
  • IR Brightness Temperature(sky_ir_temp)
  • sky_ir_temp_max


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DQRID : D121024.5
Start DateStart TimeEnd DateEnd Time
10/18/2012130010/22/20121259
Subject:
PVC/SKYRAD/M1 - IRT scale factor
DataStreams:pvcskyrad20sM1.a0, pvcskyrad60sM1.b1
Description:
The IRT was replaced with a unit with the wrong analog output configuration, such that the 
sky temperature was below the measurable range, resulting in a constant output of 0 
volts or 173.2 K.
Measurements:pvcskyrad20sM1.a0:
  • inst_sky_ir_signal

pvcskyrad60sM1.b1:
  • sky_ir_temp_std
  • sky_ir_temp_min
  • IR Brightness Temperature(sky_ir_temp)
  • sky_ir_temp_max


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DQRID : D121128.4
Start DateStart TimeEnd DateEnd Time
10/19/2012134510/19/20121515
10/22/2012134010/22/20121415
10/23/2012124510/23/20121640
10/16/2012194810/17/20121642
10/05/2012140010/05/20121510
10/18/2012161810/18/20121630
10/18/2012201810/18/20122035
Subject:
PVC/SKYRAD/M1 - Instrument noise
DataStreams:pvcskyrad60sM1.b1, pvcskyrad20sM1.a0
Description:
All instruments on Skyrad exhibit intermittant erratic behavior from 10/05 through 10/23. 
Appears to have been an grounding issue with the IRT installed on Skyrad and replaced 
10/17. After the last problem period on 10/23 the problem resolved itself without operator 
involvement.

All data on Skyrad during these erratic behaviour periods are not recoverable. Bad data 
can generally be identified by screening vBatt for values outside normal operation range of 
13.3-13.6V.
Measurements:pvcskyrad20sM1.a0:
  • inst_down_long_hemisp1_case_resist
  • inst_global
  • inst_diffuse
  • inst_sky_ir_signal
  • inst_direct_normal
  • inst_down_long_hemisp2_case_resist
  • inst_down_long_hemisp1_dome_resist
  • inst_down_long_hemisp2_dome_resist
  • inst_down_long_hemisp1_tp
  • inst_down_long_hemisp2_tp

pvcskyrad60sM1.b1:
  • sky_ir_temp_std
  • sky_ir_temp_min
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • down_long_hemisp2_std
  • Radiation, shortwave, downwelling total hemispheric irradiance, 1-min avg(down_short_hemisp)
  • inst_down_long_hemisp2_case_temp
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp1)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp2)
  • inst_down_long_hemisp2_tp
  • down_long_hemisp1_max
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
  • down_long_hemisp2_min
  • down_long_hemisp1_std
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
  • down_short_diffuse_hemisp_std
  • down_long_hemisp2_max
  • short_direct_normal_std
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • down_short_hemisp_std
  • inst_down_long_hemisp2_dome_temp
  • inst_down_long_hemisp1_case_temp
  • inst_down_long_hemisp1_dome_temp
  • IR Brightness Temperature(sky_ir_temp)
  • down_long_hemisp1_min
  • sky_ir_temp_max
  • inst_down_long_hemisp1_tp


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DQRID : D121217.8
Start DateStart TimeEnd DateEnd Time
07/11/2012120007/15/20121135
Subject:
PVC/SKYRAD/M1 - IRT disconnected
DataStreams:pvcskyrad60sM1.b1
Description:
The IRT was disconnected to diagnose PIR signal noise.
Measurements:pvcskyrad60sM1.b1:
  • sky_ir_temp_std
  • sky_ir_temp_min
  • IR Brightness Temperature(sky_ir_temp)
  • sky_ir_temp_max


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DQRID : D130227.6
Start DateStart TimeEnd DateEnd Time
02/07/2013210002/13/20131846
Subject:
PVC/SKYRAD/M1 - Tracker removed for storm
DataStreams:pvcskyrad20sM1.a0, pvcskyrad60sM1.b1
Description:
Site preparation for a pending storm in Cape Cod Area included stowing the tracker for the 
affected period.  During this time the only SKYRAD instruments with accurate 
measurements were down_short_hemisp (global horizontal shortwave pyranometer instrument), 
down_long_hemisp1 and down_long_hemisp2 (pyrgeometer instruments).

The short_direct_normal (pyrheliometer DNI instrument) and down_short_diffuse_hemisp (8-48 
shaded diffuse instrument) data are not recoverable.

Additionally, there may have been undocumented periods of missing data during this time.
Measurements:pvcskyrad20sM1.a0:
  • inst_diffuse
  • inst_direct_normal

pvcskyrad60sM1.b1:
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Minima(down_short_diffuse_hemisp_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • down_short_diffuse_hemisp_std
  • short_direct_normal_std
  • Downwelling Shortwave Diffuse Hemisp. Irrad., Ventilated Pyranometer, Maxima(down_short_diffuse_hemisp_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Radiation, shortwave, downwelling diffuse hemispheric irradiance, 1-min avg(down_short_diffuse_hemisp)
  • Radiation, shortwave, direct normal irradiance, 1-min avg(short_direct_normal)


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