Data Quality Reports for Session: 108750 User: rutan Completed: 11/05/2007


TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050321.1PYE/SKYRAD/M1 - Reprocessed: Installation problemspyeskyrad20sM1.a0, pyeskyrad60sM1.b1
D050405.1PYE/SKYRAD/M1 - Reprocessed: IRT configuration and calibrationpyeskyrad20sM1.a0, pyeskyrad60sM1.b1, pyeskyradM1.00
D050412.1PYE/MET/M1 - Data questionablepyesmet60sM1.b1
D050923.1PYE/SKYRAD/M1 - IRT biaspyeskyrad60sM1.b1
D060502.2PYE/GNDRAD/M1 - Reprocessed: IRT configuration and calibrationpyegndrad20sM1.a0, pyegndrad60sM1.b1
D060630.43PYE/SKYRAD/M1 - Reprocess: Longwave Calibration errorpyeskyrad60sM1.b1
D060630.44PYE/GNDRAD/M1 - Reprocessed: Longwave calibration errorpyegndrad60sM1.b1
D070124.2PYE/SKYRAD/M1 - Datalogger program error affected downwelling longwavepyeskyrad20sM1.a0, pyeskyrad60sM1.b1


DQRID : D050321.1
Start DateStart TimeEnd DateEnd Time
02/14/2005000004/30/20052359
Subject:
PYE/SKYRAD/M1 - Reprocessed: Installation problems
DataStreams:pyeskyrad20sM1.a0, pyeskyrad60sM1.b1
Description:
The installation of the SKYRAD instrument was not without problems.  During all or part of 
the time period specified the calibrations were incorrect or incomplete, the downwelling 
diffuse and direct normal leads were switched, and the shadowband was severely out of 
alignment.

These data have been reprocessed to apply corrections as follows:

1) NIP & PSP-diffuse leads swapped 20050214-20050412.1645
     - swapped the NIP and PSP columns in the raw data files
     - backed out the original, incorrect calibrations 
     - applied correct calibrations
2) PSP-diffuse calibration error 050214-050215
     - backed out the original, incorrect calibration
     - applied correct calibrations
3) PSP-DS cal error 050214-050215
     - backed out the original, incorrect calibration
     - applied correct calibration
4) NIP cal error 050214-050215 and 050218-050401
     - backed out the original, incorrect calibrations
     - applied correct calibration

The reprocessed data were archived in February, 2007.

Users are encouraged to still use these data with caution only after a thorough quality 
review to be certain the data meet their requirements.
Measurements:pyeskyrad60sM1.b1:
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(down_short_diffuse_hemisp_min)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded
    Pyrgeometer2(inst_down_long_shaded2_dome_temp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Standard
    Deviation(down_short_hemisp_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Minima(down_short_hemisp_min)
  • Down-welling unshaded pyranometer voltage(down_short_hemisp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
  • Sky Infra-Red Temperature(sky_ir_temp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded
    Pyrgeometer1(inst_down_long_shaded1_dome_temp)
  • Downwelling Shortwave Hemispheric Irradiance, Pyranometer, Standard Deviation(down_short_diffuse_hemisp_std)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyranometer, Maxima(down_short_hemisp_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
    Deviation(down_long_hemisp_shaded1_std)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded
    Pyrgeometer2(inst_down_long_shaded2_case_temp)
  • Shortwave Direct Normal Irradiance, Pyrgeometer(short_direct_normal)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
    Deviation(down_long_hemisp_shaded2_std)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded
    Pyrgeometer1(inst_down_long_shaded1_case_temp)
  • Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(down_short_diffuse_hemisp_max)
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)
  • Sky Infra Red Temperature Maxima(sky_ir_temp_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
  • Shortwave Direct Normal Irradiance, Pyrgeometer, Maxima(short_direct_normal_max)
  • Shortwave Direct Normal Irradiance, Pyrgeometer, Minima(short_direct_normal_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
  • Shortwave Direct Normal Irradiance, Pyrgeometer, Standard Deviation(short_direct_normal_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)

pyeskyrad20sM1.a0:
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_dome_resist)
  • Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
    Voltage(inst_global)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer2(inst_down_long_shaded2_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer2(inst_down_long_shaded2_case_resist)
  • Instantaneous Sky/Cloud Infrared(inst_sky_ir_signal)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_case_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
  • Instantaneous Direct Normal Shortwave Irradiance, Pyheliometer Thermopile
    Voltage(inst_direct_normal)
  • Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
    Thermopile Voltage(inst_diffuse)


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DQRID : D050405.1
Start DateStart TimeEnd DateEnd Time
02/17/2005182103/11/20052032
Subject:
PYE/SKYRAD/M1 - Reprocessed: IRT configuration and calibration
DataStreams:pyeskyrad20sM1.a0, pyeskyrad60sM1.b1, pyeskyradM1.00
Description:
The configuration of the IRT was inadvertently set to default and the program of the data 
loggers were changed to that used at TWP.C3.  This caused the calibration of the data to 
be wrong. It was corrected by reconfiguring the IRT and changing the conversion factors 
in the data logger program.

These data have been reprocessed to apply correct calibrations and the reprocessed data 
were archived in February, 2007.
Measurements:pyeskyrad60sM1.b1:
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)
  • Sky Infra Red Temperature Maxima(sky_ir_temp_max)
  • Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)
  • Sky Infra-Red Temperature(sky_ir_temp)

pyeskyradM1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

pyeskyrad20sM1.a0:
  • Instantaneous Sky/Cloud Infrared(inst_sky_ir_signal)


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DQRID : D050412.1
Start DateStart TimeEnd DateEnd Time
02/11/2005000003/14/20052359
Subject:
PYE/MET/M1 - Data questionable
DataStreams:pyesmet60sM1.b1
Description:
During the listed time period, the AMF was in the beginning phase of deployment.  Data 
during this time may not be representative and should be used with caution.
Measurements:pyesmet60sM1.b1:
  • Precipitation mean(precip_mean)
  • Precipitation standard deviation(precip_sd)
  • Std Dev of Relative Humidity or Hardware Error Code(relh_sd)
  • Barometric Pressure(atmos_pressure)
  • Vapor pressure standard deviation(vappress_sd)
  • Vapor pressure mean(vappress_mean)
  • Upper wind direction standard deviation(up_wind_dir_sd)
  • Upper wind speed vector average(up_wind_spd_vec_avg)
  • Precipitation maximum(precip_max)
  • Upper wind speed arithmetic average(up_wind_spd_arith_avg)
  • Mean Air Temperature or Hardware Error(temp_mean)
  • Lower wind direction standard deviation(lo_wind_dir_sd)
  • Lower wind speed standard deviation(lo_wind_spd_sd)
  • Upper wind direction vector average(up_wind_dir_vec_avg)
  • Std Dev of Air Temperature(temp_sd)
  • Logger panel temperature(logger_temp)
  • Lower wind speed minimum(lo_wind_spd_min)
  • Battery Voltage(internal_voltage)
  • Lower wind speed maximum(lo_wind_spd_max)
  • Lower wind speed vector average(lo_wind_spd_vec_avg)
  • Upper wind speed maximum(up_wind_spd_max)
  • Mean Relative Humidity(relh_mean)
  • Dummy altitude for Zeb(alt)
  • Lower wind direction vector average(lo_wind_dir_vec_avg)
  • Upper wind speed minimum(up_wind_spd_min)
  • Lower wind speed arithmetic average(lo_wind_spd_arith_avg)
  • Upper wind speed standard deviation(up_wind_spd_sd)
  • precipitation minimum(precip_min)


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DQRID : D050923.1
Start DateStart TimeEnd DateEnd Time
09/03/2005020009/14/20052359
Subject:
PYE/SKYRAD/M1 - IRT bias
DataStreams:pyeskyrad60sM1.b1
Description:
The SKYRAD IRT measured lower sky temperatures than the AERI.  This may have been due to a 
dirty mirror or lens.
Measurements:pyeskyrad60sM1.b1:
  • Sky Infra Red Temperature Minima(sky_ir_temp_min)
  • Sky Infra Red Temperature Maxima(sky_ir_temp_max)
  • Standard Deviation of Sky Infra Red Temperature(sky_ir_temp_std)
  • Sky Infra-Red Temperature(sky_ir_temp)


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DQRID : D060502.2
Start DateStart TimeEnd DateEnd Time
02/17/2005182103/11/20052032
Subject:
PYE/GNDRAD/M1 - Reprocessed: IRT configuration and calibration
DataStreams:pyegndrad20sM1.a0, pyegndrad60sM1.b1
Description:
The configuration of the IRT was inadvertently set to default and the program of the data 
loggers were changed to that used at TWP.C3.  This caused the calibration of the data to 
be wrong. It was corrected by reconfiguring the IRT and changing the conversion factors 
in the data logger program.

These data have been reprocessed to apply correct calibrations and the reprocessed data 
were archived 20070212.
Measurements:pyegndrad60sM1.b1:
  • Surface Infra-Red Temperature Minima(sfc_ir_temp_min)
  • Effective Surface (Skin) Temperature(sfc_ir_temp)
  • Surface Infra-Red Temperature Maxima(sfc_ir_temp_max)
  • Surface Infra-Red Temperature, Standard Deviation(sfc_ir_temp_std)

pyegndrad20sM1.a0:
  • Instantaneous Surface Infra-Red Signal(inst_sfc_ir_signal)


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DQRID : D060630.43
Start DateStart TimeEnd DateEnd Time
02/01/2005000009/14/20050000
Subject:
PYE/SKYRAD/M1 - Reprocess: Longwave Calibration error
DataStreams:pyeskyrad60sM1.b1
Description:
Modified pyrgeometer calibration procedures were implemented beginning in December 2003.  
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.                                                             
                The data collected while the incorrect procedures were in place are 
being reprocessing to remove the calibration bias.  Note, this also affected standard 
deviation, maximum and minimum data fields.
Measurements:pyeskyrad60sM1.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)


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DQRID : D060630.44
Start DateStart TimeEnd DateEnd Time
02/01/2005000009/14/20050000
Subject:
PYE/GNDRAD/M1 - Reprocessed: Longwave calibration error
DataStreams:pyegndrad60sM1.b1
Description:
Modified pyrgeometer calibration procedures were implemented beginning in December 2003. 
These modified procedures introduced a calibration bias in the longwave data.  The 
previous procedures were re-implemented at all sites between December 2005 and February 2006 to 
restore proper calibrations.

The data collected while the incorrect procedures were in place have been reprocessed to 
remove the calibration bias.  The reprocessed 60 second averaged data are based on 3 
instantaneous 20 second data records rather than on 60 1 second instantaneous data records. 
Still, these data are considered far superior to the originally processed data. The 
reprocessed data were archived in February 2007.
Measurements:pyegndrad60sM1.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Pyrgeometer(up_long_hemisp)


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DQRID : D070124.2
Start DateStart TimeEnd DateEnd Time
03/01/2005000009/14/20052359
Subject:
PYE/SKYRAD/M1 - Datalogger program error affected downwelling longwave
DataStreams:pyeskyrad20sM1.a0, pyeskyrad60sM1.b1
Description:
The excitation delays used in measuring the PIR1 case thermistor, "Case1", and the PIR2 
dome thermistor, "Dome2", were discovered to have been incorrectly set to 0 in the Skyrad 
datalogger program when the new CR23X based Skyrad loggers were installed.  The result of 
no delay in these measurements results in an error in the measured resistance of the 
thermistors, Case1 and Dome2, and thus the calculated PIR1 and PIR2 irradiances.  The 
absolute value of the errors are inversely proportial to temperature.

At Pt Reyes, we are unable to determine if the excitation delay problem was present.  The 
first Skyrad datalogger program installed at PYE was correct but later versions modified 
and uploaded in March and April of 2005 may have had the Delay0 problem.

The problem also can not be determined from the data.  Pt. Reyes temperature fluctuations 
throughout the year are maritime and fall into a relatively narrow range in 2005 between 
2.5-20C.  The Delay0 problem introduces larger errors into PIR1 and PIR2 irradiance 
calculations as the temperature drops.  At the lowest temperature at Pt Reyes in 2005 (approx 
2.5C occurring in March) the largest PIR1 error would be -.48 W/m2 and PIR2 +.38 W/m2.  
The scale of these errors are smaller than the resolution of the instrument and are lost 
in the normal variation of the instrument readings. Cursory review of the thermistor data 
during cold periods does not show any discernable biases.  Furthermore, the data logger 
programming "error" due to the Delay0 problem is an order of magnitude less than the total 
estimated measurement uncertainty of the pyrgeometer data from any ARM installation (+/- 
5 W/sq m for 4-coeff and +/- 10 W/sq m for 2-coeff calibrations).

Due to these issues, no Delay0 corrections will be applied to PYE Skyrad data.
Measurements:pyeskyrad60sM1.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
    Deviation(down_long_hemisp_shaded2_std)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded
    Pyrgeometer1(inst_down_long_shaded1_case_temp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded
    Pyrgeometer2(inst_down_long_shaded2_dome_temp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded
    Pyrgeometer1(inst_down_long_shaded1_dome_temp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
    Deviation(down_long_hemisp_shaded1_std)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded
    Pyrgeometer2(inst_down_long_shaded2_case_temp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)

pyeskyrad20sM1.a0:
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer2(inst_down_long_shaded2_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_case_resist)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer2(inst_down_long_shaded2_case_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)


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