Data Quality Reports for Session: 114687 User: gaun Completed: 10/08/2008

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D080611.2TWP/SMET/C3 - Lower Wind Direction Intermittently Wrongtwpsmet60sC3.b1
D080617.1TWP/SMET/C2 - ORG rainfall measurements too largetwpsmet60sC2.b1
D080618.1TWP/SKYRAD/C1 - Tracker Failuretwpskyrad20sC1.a0, twpskyrad60sC1.b1
D080715.1TWP/SMET/C3 - Upper wind speed data incorrecttwpsmet60sC3.b1
D080826.3TWP/SKYRAD/C1 - PIR2 ventilator fan failuretwpskyrad20sC1.a0, twpskyrad60sC1.b1
D080925.1TWP/SONDE/C2 - Bad RH values throughout soundingtwpsondewnpnC2.b1


DQRID : D080611.2
Start DateStart TimeEnd DateEnd Time
05/27/2008194506/24/20080113
Subject:
TWP/SMET/C3 - Lower Wind Direction Intermittently Wrong
DataStreams:twpsmet60sC3.b1
Description:
The lower wind sensor cabling had a problem causing an intermittent connection for the 
wind direction data.
Measurements:twpsmet60sC3.b1:
  • Lower sensor, wind direction vector average(lo_dir_vec_avg)
  • Lower sensor, wind direction standard deviation(lo_dir_sd)

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DQRID : D080617.1
Start DateStart TimeEnd DateEnd Time
05/08/2008000008/07/20082300
Subject:
TWP/SMET/C2 - ORG rainfall measurements too large
DataStreams:twpsmet60sC2.b1
Description:
The ORG was collecting large amounts of rainfall compared to the co-located tipping bucket 
raingauge.  The cable was chewed by mice causing the wires to make contact 
intermittently mimicking rainfall.
Measurements:twpsmet60sC2.b1:
  • Precipitation maximum(precip_max)
  • Precipitation mean(precip_mean)
  • precipitation minimum(precip_min)
  • Precipitation standard deviation(precip_sd)

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DQRID : D080618.1
Start DateStart TimeEnd DateEnd Time
06/10/2008200006/12/20080800
Subject:
TWP/SKYRAD/C1 - Tracker Failure
DataStreams:twpskyrad20sC1.a0, twpskyrad60sC1.b1
Description:
The solar tracker at C1 failed to wake up the morning of 6/10 approximately 2000GMT. Ops 
discovered problem and reset tracker 6/12 approximately 0800GMT.

Tracker dependent instrument data is inaccurate - this includes the short_direct (NIP) and 
down_short_diffuse_hemisp (8-48). The down_short_hemisp (PSP) and down_long_hemisp (PIR) 
are unaffected.
Measurements:twpskyrad20sC1.a0:
  • Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
    Voltage(inst_direct_normal)
  • Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
    Thermopile Voltage(inst_diffuse)
twpskyrad60sC1.b1:
  • Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std)
  • Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(down_short_diffuse_hemisp_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(down_short_diffuse_hemisp_min)
  • 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)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)

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DQRID : D080715.1
Start DateStart TimeEnd DateEnd Time
07/08/2008204507/17/20080144
Subject:
TWP/SMET/C3 - Upper wind speed data incorrect
DataStreams:twpsmet60sC3.b1
Description:
Beginning on 07/08, the upper wind sensor started reporting significantly lower wind 
speeds than the lower wind sensor.  The cable connections weather proofing failed allowing 
corrosion to occur and increasing he resistance of the cables.  This in turn lowered the 
wind speeds artificially.
Measurements:twpsmet60sC3.b1:
  • Upper sensor, wind speed maximum(up_spd_max)
  • Upper sensor, wind speed arithmetic average(up_spd_arith_avg)
  • Upper sensor, wind speed minimum(up_spd_min)
  • Upper sensor, wind speed vector average(up_spd_vec_avg)
  • Upper sensor, wind speed standard deviation(up_spd_sd)

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DQRID : D080826.3
Start DateStart TimeEnd DateEnd Time
08/14/2008020008/18/20080545
Subject:
TWP/SKYRAD/C1 - PIR2 ventilator fan failure
DataStreams:twpskyrad20sC1.a0, twpskyrad60sC1.b1
Description:
During the time range specified the PIR2 output is questionable due to ventilator fan 
failure. Although the PIR is temperature compensated, data review indicates that the PIR2 
didn't compare as well with PIR1. Typical differences during full sun are approximately 10 
w/m2. During this time period differences of 10-14 W/m2 were noted.
Measurements:twpskyrad20sC1.a0:
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer2(inst_down_long_hemisp2_case_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer2(inst_down_long_hemisp2_tp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer2(inst_down_long_hemisp2_dome_resist)
twpskyrad60sC1.b1:
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_case_temp)
  • Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Minima(down_long_hemisp2_min)
  • Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2(down_long_hemisp2)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer2(inst_down_long_hemisp2_dome_temp)
  • Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Standard Deviation(down_long_hemisp2_std)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Pyrgeometer2(inst_down_long_hemisp2_tp)
  • Downwelling Longwave Hemispheric Irradiance, Pyrgeometer2, Maxima(down_long_hemisp2_max)

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DQRID : D080925.1
Start DateStart TimeEnd DateEnd Time
09/08/2008114509/08/20081145
Subject:
TWP/SONDE/C2 - Bad RH values throughout sounding
DataStreams:twpsondewnpnC2.b1
Description:
RH values fluctuate largely in a stepping function throughout the sounding.  Suspect bad 
RH sensors.
Measurements:twpsondewnpnC2.b1:
  • Relative humidity inside the instrument enclosure(rh)

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