Data Quality Reports for Session: 101835 User: perez Completed: 10/02/2006

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D040615.5SGP/SIRS/E12 - Incorrect TimessgpsirsE12.00, sgpsirsE12.b1, sgpsirs20sE12.a0, sgp1swfanalsirs1longE12.c1,
sgp15swfanalsirs1longE12.c1
D050429.1SGP/SIRS/E12 - Reprocess: Incorrect calibrationssgpsirsE12.00, sgpsirsE12.b1, sgpsirs20sE12.a0
D060630.20SGP/SIRS/E12 - Reprocess: Longwave Calibration errorsgpsirsE12.b1


DQRID : D040615.5
Start DateStart TimeEnd DateEnd Time
02/19/2004221203/10/20042247
Subject:
SGP/SIRS/E12 - Incorrect Times
DataStreams:sgpsirsE12.00, sgpsirsE12.b1, sgpsirs20sE12.a0, sgp1swfanalsirs1longE12.c1,
sgp15swfanalsirs1longE12.c1
Description:
The ntpd server (time adjustment) stopped working on Feb. 19th at 22:12:16 GMT, and the 
clock was corrected by -5600.177269 seconds
on March 10th at 22:47 GMT. The recorded times for observations are
off by amounts ranging from 0 seconds on Feb. 19th to 5600 seconds
on March 10th.
Measurements:sgp1swfanalsirs1longE12.c1:
  • Clear-sky Fit Coefficient b to Diffuse Irradiance to Total Irradiance Ratio
    (DFRb)(coef_clearsky_difratio_b)
  • Clear-sky Fit Estimated Downwelling Summed Shortwave Irradiance
    (dirfluxdn_clearskyfit+diffluxdn_clearskyfit) (cssw)(sswfluxdn_clearskyfit)
  • Time offset of tweaks from base_time(time_offset)
  • Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cgsw)(gswfluxdn_clearskyfit)
  • Clear-sky Fit Estimated Surface Albedo from Shortwave Irradiance Measurements
    (calb)(albedosw_clearskyfit)
  • Clear-sky Fit Coefficient b to Global UVB Irradiance (UVBb)(coef_clearsky_guvb_b)
  • Clear-sky Fit Coefficient a to Global minus Summed Shortwave Irradiance
    Difference (SCORa)(coef_clearsky_dsw_a)
  • Clear-sky Fit Coefficient a to Albedo (Alba)(coef_clearsky_albedo_a)
  • Measured Downwelling Global Shortwave Irradiance (gsw)(gswfluxdn_measured)
  • Time Offset from base_time_LST(time_offset_LST)
  • Difference: difswfluxdn_measured - difswfluxdn_clearskyfit (diffcg)(difswfluxdn_cloudeffect)
  • Beginning Time of File (LST)(base_time_LST)
  • Clear-sky Fit Estimated Downwelling Direct Shortwave Irradiance (cdir)(dirfluxdn_clearskyfit)
  • Clear-sky Fit Estimated Downwelling Diffuse Field Shortwave Irradiance (cdif)(difswfluxdn_clearskyfit)
  • Difference: sswfluxdn_measured - sswfluxdn_clearskyfit (sswfcg)(sswfluxdn_cloudeffect)
  • Measured Downwelling Global UVB Irradiance (guvb)(guvbdn_measured)
  • Clear-sky Fit Coefficient b to Albedo (Albb)(coef_clearsky_albedo_b)
  • Site Identification(site)
  • Ratio of Measured Downwelling Diffuse Shortwave Irradiance to Measured
    Downwelling Global Shortwave Irradiance (difr)(difratiodn_measured)
  • Date (YYMMDD LST) for which the Coefficients are Applicable(coef_date)
  • Time offset from base_time(base_time)
  • Clear-sky Fit Coefficient b to Global minus Summed Shortwave Irradiance
    Difference (SCORb)(coef_clearsky_dsw_b)
  • Measured Downwelling Direct Shortwave Irradiance (dir)(dirfluxdn_measured)
  • Measured Downwelling Summed Shortwave Irradiance
    (dirfluxdn_measured+diffluxdn_measured) (ssw)(sswfluxdn_measured)
  • Measured Surface Albedo from Shortwave Irradiance Measurements (alb)(albedosw_measured)
  • Ratio of Clear-sky Fit Estimated Downwelling Diffuse Shortwave Irradiance to
    Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cdifr)(difratiodn_clearskyfit)
  • Clear-sky Detection Flag (clrf)(flag_clearsky_detection)
  • Arithmetic Average Cosine of the Solar Zenith Angle Z (CosZ)(solar_cos_z)
  • Arithmetic Average Distance from the Earth to the Sun (au)(sun_earth_distance)
  • Daily Averaged Distance from the Earth to the Sun (auavg)(sun_earth_distance_dailyaverage)
  • Clear-sky Fit Coefficient b to Global Shortwave Irradiance (CSWb)(coef_clearsky_gsw_b)
  • Measured Downwelling Diffuse Shortwave Irradiance (dif)(difswfluxdn_measured)
  • Clear-sky Fit Coefficient b to Summed Shortwave Irradiance (CSWb)(coef_clearsky_ssw_b)
  • Clear-sky Fit Coefficient a to Summed Shortwave Irradiance (CSWa)(coef_clearsky_ssw_a)
  • Clear-sky Fit Coefficient a to Global Shortwave Irradiance (CSWa)(coef_clearsky_gsw_a)
  • Clear-sky Offset Coefficient c for Global minus Summed Shortwave Irradiance
    Difference (SCORc)(coef_clearsky_dsw_c)
  • Difference: gswfluxdn_measured - gswfluxdn_clearskyfit (gswfcg)(gswfluxdn_cloudeffect)
  • Clear-sky Fit Coefficient a to Diffuse Irradiance to Total Irradiance Ratio
    (DFRa)(coef_clearsky_difratio_a)
  • Clear-sky Fit Estimated Downwelling Global UVB Irradiance (cguvb)(guvbdn_clearskyfit)
  • Clear-sky Fit Coefficient a to Global UVB Irradiance (UVBa)(coef_clearsky_guvb_a)
sgpsirsE12.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Standard Deviation(up_long_hemisp_std)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded
    Pyrgeometer(inst_down_long_shaded_dome_temp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(up_short_hemisp_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_shaded_std)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(up_short_hemisp_min)
  • Time offset of tweaks from base_time(time_offset)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
  • Instantaneous Upwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer(inst_up_long_dome_temp)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Maxima(up_long_hemisp_max)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Minima(up_long_hemisp_min)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(up_short_hemisp_std)
  • Battery voltage(vBatt)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(down_short_diffuse_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(down_short_diffuse_hemisp_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded
    Pyrgeometer(inst_down_long_shaded_case_temp)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
  • Instantaneous Upwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer(inst_up_long_case_temp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • Time offset from base_time(base_time)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(down_short_diffuse_hemisp_std)
sgp15swfanalsirs1longE12.c1:
  • Measured Surface Albedo from Shortwave Irradiance Measurements (alb)(albedosw_measured)
  • Time offset of tweaks from base_time(time_offset)
  • Measured Downwelling Global UVB Irradiance (guvb)(guvbdn_measured)
  • Number of 1-minute Cloud Fraction Estimates in the 15-minute Interval (Ncf)(nsamples_cloudfraction)
  • Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cgsw)(gswfluxdn_clearskyfit)
  • Difference: sswfluxdn_measured - sswfluxdn_clearskyfit (sswfcg)(sswfluxdn_cloudeffect)
  • Time Offset from base_time_LST(time_offset_LST)
  • Difference: gswfluxdn_measured - gswfluxdn_clearskyfit (gswfcg)(gswfluxdn_cloudeffect)
  • Clear-sky Fit Estimated Downwelling Summed Shortwave Irradiance
    (dirfluxdn_clearskyfit+diffluxdn_clearskyfit) (cssw)(sswfluxdn_clearskyfit)
  • Ratio of Measured minus Clear-sky Fit Estimated Downwelling Diffuse Shortwave
    Irradiance to Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance
    (di(difcloudeffect_normalized)
  • Measured Downwelling Diffuse Shortwave Irradiance (dif)(difswfluxdn_measured)
  • Beginning Time of File (LST)(base_time_LST)
  • Clear-sky Fit Estimated Surface Albedo from Shortwave Irradiance Measurements
    (calb)(albedosw_clearskyfit)
  • Number of 1-minute Measured Downwelling Summed Shortwave Irradiances in the
    15-minute Interval (Nssw)(nsamples_sswfluxdn_measured)
  • Average over the interval of the standard deviation of difratiodn_measured
    computed using a 3-5 sample window centered at each 1-min sample(difratiodn_measured_stdev)
  • Estimated Average Fractional Sky Cover over the Hemispheric Dome (cf)(cloudfraction)
  • Arithmetic Average Cosine of the Solar Zenith Angle Z (CosZ)(solar_cos_z)
  • Measured Downwelling Global Shortwave Irradiance (gsw)(gswfluxdn_measured)
  • Clear-sky Fit Estimated Downwelling Direct Shortwave Irradiance (cdir)(dirfluxdn_clearskyfit)
  • Site Identification(site)
  • Measured Downwelling Direct Shortwave Irradiance (dir)(dirfluxdn_measured)
  • Measured Downwelling Summed Shortwave Irradiance
    (dirfluxdn_measured+diffluxdn_measured) (ssw)(sswfluxdn_measured)
  • Ratio of Measured Downwelling Diffuse Shortwave Irradiance to Measured
    Downwelling Global Shortwave Irradiance (difr)(difratiodn_measured)
  • Clear-sky Fit Estimated Downwelling Global UVB Irradiance (cguvb)(guvbdn_clearskyfit)
  • Arithmetic Average Distance from the Earth to the Sun (au)(sun_earth_distance)
  • Difference: difswfluxdn_measured - difswfluxdn_clearskyfit (diffcg)(difswfluxdn_cloudeffect)
  • Ratio of Clear-sky Fit Estimated Downwelling Diffuse Shortwave Irradiance to
    Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cdifr)(difratiodn_clearskyfit)
  • Number of 1-minute Clear-sky Detections in the 15-minute Interval (Nclr)(nsamples_clearsky_detection)
  • Clear-sky Fit Estimated Downwelling Diffuse Field Shortwave Irradiance (cdif)(difswfluxdn_clearskyfit)
  • Number of 1-minute Clear-sky Fit Downwelling Global Shortwave Irradiance
    Estimates in the 15-minute Interval (Ncsw)(nsamples_gswfluxdn_clearskyfit)
  • Time offset from base_time(base_time)
sgpsirs20sE12.a0:
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer(inst_down_long_shaded_dome_resist)
  • Instantaneous Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist)
  • Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
    Voltage(inst_global)
  • Time offset from base_time(base_time)
  • Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
    Thermopile Voltage(inst_diffuse)
  • Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile
    Voltage(inst_direct_normal)
  • Instantaneous Upwelling Pyrgeometer Thermopile Voltage, Pyrgeometer(inst_up_long_hemisp_tp)
  • Instantaneous Upwelling Shortwave Irradiance, Inverted Pyranometer Thermopile
    Voltage(inst_up_short_hemisp)
  • Time offset of tweaks from base_time(time_offset)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer(inst_down_long_shaded_case_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)
  • Instantaneous Upwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer(inst_up_long_dome_resist)
sgpsirsE12.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D050429.1
Start DateStart TimeEnd DateEnd Time
04/26/2005172605/03/20051840
Subject:
SGP/SIRS/E12 - Reprocess: Incorrect calibrations
DataStreams:sgpsirsE12.00, sgpsirsE12.b1, sgpsirs20sE12.a0
Description:
During site corrective maintenance to resolve an Extended Facility data collection 
problem, the SIRS.E12 datalogger was power cycled (1725 GMT).  The datalogger reverted to an old 
SIRS program with incorrect S/Ns and calibration coefficients for all instruments at 
this station.

The data can be recalibrated as follows:
First divide value by incorrectly applied cal coeff (first number) then multiply by 
correct cal coeff (second number)
  down_short_diffuse_hemisp     107.27	118.68
  up_short_hemisp	        113.19	127.95
  short_direct_normal           120.17	120.52
  down_short_hemisp             118.46	102.11
  up_long_netir                 0.2747	0.2708
  down_long_netir               0.2657	0.2435

Reapply cal coeffs below using up_long_netIR(uV), inst_up_long_dome_temp(K),   
inst_up_long_dome_temp(K) using procedure described in SIRS instrument manual.
  up_long_hemisp
	k0	-23.4600 W/m^2\n,
	k1	0.2708 W/(m^2*uV)\n,
	k2	1.0440 unitless\n,
	k3	-2.5160 unitless\n,
	kr	0.000700 K/uV\n,

Reapply cal coeffs below using down_long_netIR(uV),inst_down_long_dome_temp 
(K),inst_down_long_dome_temp(K).
  down_long_hemisp_shaded	
        k0	-25.8700 W/m^2\n,
	k1	0.2435 W/(m^2*uV)\n,
	k2	1.0520 unitless\n,
	k3	-2.8950 unitless\n,
	kr	0.000700 K/uV\n,
Measurements:sgpsirsE12.b1:
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Standard Deviation(up_long_hemisp_std)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Temperature, Shaded
    Pyrgeometer(inst_down_long_shaded_dome_temp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_shaded_std)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(up_short_hemisp_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • Time offset of tweaks from base_time(time_offset)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(down_short_diffuse_hemisp_min)
  • Instantaneous Upwelling Pyrgeometer Case Thermistor Temperature, Pyrgeometer(inst_up_long_case_temp)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Instantaneous Upwelling Pyrgeometer Dome Thermistor Temperature, Pyrgeometer(inst_up_long_dome_temp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Maxima(up_long_hemisp_max)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Minima(up_long_hemisp_min)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Temperature, Shaded
    Pyrgeometer(inst_down_long_shaded_case_temp)
  • Time offset from base_time(base_time)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(up_short_hemisp_std)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(down_short_diffuse_hemisp_max)
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(down_short_diffuse_hemisp_std)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
  • altitude above sea levelaltunits(alt)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(up_short_hemisp_max)
sgpsirs20sE12.a0:
  • Instantaneous Upwelling Pyrgeometer Thermopile Voltage, Pyrgeometer(inst_up_long_hemisp_tp)
  • Instantaneous Direct Normal Shortwave Irradiance, Pyrheliometer Thermopile
    Voltage(inst_direct_normal)
  • Instantaneous Upwelling Shortwave Irradiance, Inverted Pyranometer Thermopile
    Voltage(inst_up_short_hemisp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer(inst_down_long_shaded_dome_resist)
  • Instantaneous Upwelling Pyrgeometer Case Thermistor Resistance, Pyrgeometer(inst_up_long_case_resist)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer(inst_down_long_shaded_case_resist)
  • Instantaneous Uncorrected Downwelling Shortwave Diffuse, Shaded Pyranometer
    Thermopile Voltage(inst_diffuse)
  • Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)
  • Instantaneous Upwelling Pyrgeometer Dome Thermistor Resistance, Pyrgeometer(inst_up_long_dome_resist)
  • Instantaneous Downwelling Hemispheric Shortwave, Unshaded Pyranometer Thermopile
    Voltage(inst_global)
sgpsirsE12.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D060630.20
Start DateStart TimeEnd DateEnd Time
07/22/2003164002/14/20061710
Subject:
SGP/SIRS/E12 - Reprocess: Longwave Calibration error
DataStreams:sgpsirsE12.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:sgpsirsE12.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • Downwelling Longwave Hemispheric Net Infrared(down_long_netir)
  • Upwelling Longwave Hemispheric Net Infrared(up_long_netir)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)

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