Data Quality Reports for Session: 103357 User: zhiansun Completed: 12/20/2006

TABLE OF CONTENTS

DQR IDSubjectData Streams Affected
D050714.3TWP/SKYRAD/C1 - Apparent logger problemtwpskyradC1.00, twpskyrad20sC1.a1, twpskyrad60sC1.b1, twpskyrad1duttC1.c1,
twp1swfanalskyrad1longC1.c1, twp15swfanalskyrad1longC1.c1
D051119.1TWP/SKYRAD/C1 - IRT failuretwpskyrad60sC1.b1
D051202.5TWP/SKYRAD/C1 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2
downwelling longwave		twpskyrad20sC1.a0, twpskyrad60sC1.b1
D060630.31TWP/SKYRAD/C1 - Reprocess: Longwave Calibration errortwpskyrad60sC1.b1


DQRID : D050714.3
Start DateStart TimeEnd DateEnd Time
07/13/2005062007/15/20051900
Subject:
TWP/SKYRAD/C1 - Apparent logger problem
DataStreams:twpskyradC1.00, twpskyrad20sC1.a1, twpskyrad60sC1.b1, twpskyrad1duttC1.c1,
twp1swfanalskyrad1longC1.c1, twp15swfanalskyrad1longC1.c1
Description:
Beginning at 0620Z on 13 July, all Manus SKYRAD measurements deviated wildly from expected 
values.  The longwave fluxes climbed to well over the expected maximum of 500 W/m^2 to 
values over 1000 W/m^2.  At the same time, shortwave flux components developed large 
inconsistancies and night-time offsets.  Values had somewhat returned to normal ranges by 
2200Z on 14 July but again developed internal inconsistancies between 0430 and 1900Z on 15 
July.  The instruments appeared to be working normally once again as of 1900Z on 15 July.  
It is not known what caused this period of faulty values but it is thought that an 
electrical surge - perhaps from a lightning storm (though none was reported) may have caused 
the temporary problems.
Measurements:twpskyrad1duttC1.c1:
  • Time offset from base_time(base_time)
  • Time offset from midnight of date of file. For CO data, this is identical to
    time_offset and is included for compatibility.(time)
  • Wind #1 Direction(wind_direction_1)
  • Full correction mode for Downwelling Shortwave Hemispheric Irradiance,
    Ventilated Pyrgeometer(dsdh_full_corrected_mode)
  • Downwelling Pyrgeometer Case Thermistor Temperature, Backup(down_long_case_temperature_backup)
  • Status flag for Downwelling Shortwave Hemispheric Irradiance, Ventilated
    Pyrgeometer, Detector only corrected(status_dsdh_detector_corrected)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Uncorrected for IR loss, Minima(down_short_hemisp_uncorrected_min)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_long_hemisp_std)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance Uncorrected, Pyrgeometer,
    Standard Deviation(down_short_diffuse_hemisp_uncorrected_std)
  • Effective temperature(effective_temperature)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Backup(down_long_hemisp_backup)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_long_hemisp)
  • Downwelling Pyrgeometer Dome Thermistor Temperature, Backup(down_long_dome_temperature_backup)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Uncorrected for IR loss, Standard Deviation(down_short_hemisp_uncorrected_std)
  • Detector Flux, Backup(detector_flux_backup)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(up_short_hemisp_min)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance Uncorrected, Pyrgeometer,
    Maxima(down_short_diffuse_hemisp_uncorrected_max)
  • Vapor Pressure (kiloPascals)(vap_pres)
  • north latitude for all the input platforms.(lat)
  • Status flag for Rayleigh limit(status_rayleigh_limit)
  • Air Temperature(air_temperature)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer(up_short_hemisp)
  • Solar Zenith Angle(zenith)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Minima(up_long_hemisp_min)
  • Upwelling Pyrgeometer Dome Thermistor Temperature(up_long_dome_temperature)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_long_hemisp_max)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(up_short_hemisp_std)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • altitude above sea levelaltunits(alt)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
  • Downwelling Shortwave Hemispheric Irradiance, Calculated, Sum of Direct
    Shortwave and Corrected Diffuse Shortwave(down_short_hemisp_sum)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer(up_long_hemisp)
  • Status flag for Downwelling Shortwave Hemispheric Irradiance, Ventilated
    Pyrgeometer, Full corrected (Mean absolute deviation)(status_dsdh_full_corrected)
  • barometric pressure(bar_pres)
  • Downwelling Pyrgeometer Case Thermistor Temperature(down_long_case_temperature)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Best
    Estimate(dsdh_best_estimate)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Backup,
    Maxima(down_long_hemisp_backup_max)
  • Relative humidity scaled, by total column amount from MWR(rh)
  • Wind #2 Speed(wind_speed_2)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance Uncorrected, Pyrgeometer,
    Minima(down_short_diffuse_hemisp_uncorrected_min)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Backup,
    Standard Deviation(down_long_hemisp_backup_std)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • precipitation accumulated between outputs, 3-hr accumulation(precip)
  • Rayleigh limit(rayleigh_limit)
  • Downwelling Pyrgeometer Dome Thermistor Temperature(down_long_dome_temperature)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Maxima(up_long_hemisp_max)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Uncorrected for IR loss, Maxima(down_short_hemisp_uncorrected_max)
  • Upwelling Pyrgeometer Case Thermistor Temperature(up_long_case_temperature)
  • Time offset of tweaks from base_time(time_offset)
  • Detector only correction mode for Downwelling Shortwave Hemispheric Irradiance,
    Ventilated Pyrgeometer(dsdh_detector_corrected_mode)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Detector
    only corrected(dsdh_detector_corrected)
  • Upwelling (10 meter) Longwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Standard Deviation(up_long_hemisp_std)
  • east longitude for all the input platforms.(lon)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_long_hemisp_min)
  • Downwelling Longwave Hemispheric Irradiance, Ventilated Pyrgeometer, Backup,
    Minima(down_long_hemisp_backup_min)
  • Cosine of the Solar Zenith Angle(cos_zenith)
  • Wind #1 Speed(wind_speed_1)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance Uncorrected, Pyrgeometer(down_short_diffuse_hemisp_uncorrected)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer,
    Uncorrected for IR loss(down_short_hemisp_uncorrected)
  • Wind #2 Direction(wind_direction_2)
  • Detector flux (Down-welling pyrgeometer thermopile voltage * PIR-DIR calib-coef)
    Calculated value from 20s data(detector_flux)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Full
    corrected (Weighted Mean absolute deviation using Median)(dsdh_full_corrected)
  • Status flag for Downwelling Shortwave Hemispheric Irradiance, Ventilated
    Pyrgeometer, Sum of Direct Shortwave and Corrected Diffuse Shortwave(status_down_short_hemisp_sum)
  • Upwelling (10 meter) Shortwave Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(up_short_hemisp_max)
twp15swfanalskyrad1longC1.c1:
  • Measured Downwelling Global Shortwave Irradiance (gsw)(gswfluxdn_measured)
  • altitude above sea levelaltunits(alt)
  • Ratio of Clear-sky Fit Estimated Downwelling Diffuse Shortwave Irradiance to
    Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cdifr)(difratiodn_clearskyfit)
  • Measured Downwelling Direct Shortwave Irradiance (dir)(dirfluxdn_measured)
  • Number of 1-minute Measured Downwelling Summed Shortwave Irradiances in the
    15-minute Interval (Nssw)(nsamples_sswfluxdn_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)
  • Site Identification(site)
  • Difference: gswfluxdn_measured - gswfluxdn_clearskyfit (gswfcg)(gswfluxdn_cloudeffect)
  • north latitude for all the input platforms.(lat)
  • Number of 1-minute Clear-sky Detections in the 15-minute Interval (Nclr)(nsamples_clearsky_detection)
  • Clear-sky Fit Estimated Downwelling Direct Shortwave Irradiance (cdir)(dirfluxdn_clearskyfit)
  • Clear-sky Fit Estimated Surface Albedo from Shortwave Irradiance Measurements
    (calb)(albedosw_clearskyfit)
  • 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)
  • Number of 1-minute Cloud Fraction Estimates in the 15-minute Interval (Ncf)(nsamples_cloudfraction)
  • Beginning Time of File (LST)(base_time_LST)
  • Time Offset from base_time_LST(time_offset_LST)
  • Clear-sky Fit Estimated Downwelling Diffuse Field Shortwave Irradiance (cdif)(difswfluxdn_clearskyfit)
  • Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cgsw)(gswfluxdn_clearskyfit)
  • Measured Surface Albedo from Shortwave Irradiance Measurements (alb)(albedosw_measured)
  • Measured Downwelling Diffuse Shortwave Irradiance (dif)(difswfluxdn_measured)
  • east longitude for all the input platforms.(lon)
  • Ratio of Measured minus Clear-sky Fit Estimated Downwelling Diffuse Shortwave
    Irradiance to Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance
    (di(difcloudeffect_normalized)
  • Time offset of tweaks from base_time(time_offset)
  • Measured Downwelling Summed Shortwave Irradiance
    (dirfluxdn_measured+diffluxdn_measured) (ssw)(sswfluxdn_measured)
  • Time offset from base_time(base_time)
  • Arithmetic Average Cosine of the Solar Zenith Angle Z (CosZ)(solar_cos_z)
  • Ratio of Measured Downwelling Diffuse Shortwave Irradiance to Measured
    Downwelling Global Shortwave Irradiance (difr)(difratiodn_measured)
  • Number of 1-minute Clear-sky Fit Downwelling Global Shortwave Irradiance
    Estimates in the 15-minute Interval (Ncsw)(nsamples_gswfluxdn_clearskyfit)
  • Difference: sswfluxdn_measured - sswfluxdn_clearskyfit (sswfcg)(sswfluxdn_cloudeffect)
  • Clear-sky Fit Estimated Downwelling Summed Shortwave Irradiance
    (dirfluxdn_clearskyfit+diffluxdn_clearskyfit) (cssw)(sswfluxdn_clearskyfit)
  • Difference: difswfluxdn_measured - difswfluxdn_clearskyfit (diffcg)(difswfluxdn_cloudeffect)
  • Measured Downwelling Global UVB Irradiance (guvb)(guvbdn_measured)
twp1swfanalskyrad1longC1.c1:
  • Clear-sky Fit Coefficient b to Diffuse Irradiance to Total Irradiance Ratio
    (DFRb)(coef_clearsky_difratio_b)
  • Measured Downwelling Direct Shortwave Irradiance (dir)(dirfluxdn_measured)
  • Measured Downwelling Global UVB Irradiance (guvb)(guvbdn_measured)
  • altitude above sea levelaltunits(alt)
  • Clear-sky Fit Estimated Downwelling Direct Shortwave Irradiance (cdir)(dirfluxdn_clearskyfit)
  • Clear-sky Fit Coefficient a to Summed Shortwave Irradiance (CSWa)(coef_clearsky_ssw_a)
  • Clear-sky Fit Coefficient a to Global UVB Irradiance (UVBa)(coef_clearsky_guvb_a)
  • Clear-sky Fit Coefficient b to Global UVB Irradiance (UVBb)(coef_clearsky_guvb_b)
  • Date (YYMMDD LST) for which the Coefficients are Applicable(coef_date)
  • Difference: gswfluxdn_measured - gswfluxdn_clearskyfit (gswfcg)(gswfluxdn_cloudeffect)
  • Measured Downwelling Global Shortwave Irradiance (gsw)(gswfluxdn_measured)
  • Clear-sky Fit Coefficient a to Global minus Summed Shortwave Irradiance
    Difference (SCORa)(coef_clearsky_dsw_a)
  • Clear-sky Fit Coefficient b to Summed Shortwave Irradiance (CSWb)(coef_clearsky_ssw_b)
  • Ratio of Measured Downwelling Diffuse Shortwave Irradiance to Measured
    Downwelling Global Shortwave Irradiance (difr)(difratiodn_measured)
  • Clear-sky Fit Estimated Surface Albedo from Shortwave Irradiance Measurements
    (calb)(albedosw_clearskyfit)
  • Measured Surface Albedo from Shortwave Irradiance Measurements (alb)(albedosw_measured)
  • Difference: difswfluxdn_measured - difswfluxdn_clearskyfit (diffcg)(difswfluxdn_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 Estimated Downwelling Diffuse Field Shortwave Irradiance (cdif)(difswfluxdn_clearskyfit)
  • Time Offset from base_time_LST(time_offset_LST)
  • Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cgsw)(gswfluxdn_clearskyfit)
  • Time offset of tweaks from base_time(time_offset)
  • east longitude for all the input platforms.(lon)
  • Clear-sky Fit Estimated Downwelling Summed Shortwave Irradiance
    (dirfluxdn_clearskyfit+diffluxdn_clearskyfit) (cssw)(sswfluxdn_clearskyfit)
  • Arithmetic Average Cosine of the Solar Zenith Angle Z (CosZ)(solar_cos_z)
  • Clear-sky Offset Coefficient c for Global minus Summed Shortwave Irradiance
    Difference (SCORc)(coef_clearsky_dsw_c)
  • Clear-sky Fit Coefficient a to Global Shortwave Irradiance (CSWa)(coef_clearsky_gsw_a)
  • Clear-sky Fit Coefficient b to Global Shortwave Irradiance (CSWb)(coef_clearsky_gsw_b)
  • Beginning Time of File (LST)(base_time_LST)
  • Clear-sky Fit Coefficient b to Global minus Summed Shortwave Irradiance
    Difference (SCORb)(coef_clearsky_dsw_b)
  • Difference: sswfluxdn_measured - sswfluxdn_clearskyfit (sswfcg)(sswfluxdn_cloudeffect)
  • Ratio of Clear-sky Fit Estimated Downwelling Diffuse Shortwave Irradiance to
    Clear-sky Fit Estimated Downwelling Global Shortwave Irradiance (cdifr)(difratiodn_clearskyfit)
  • Measured Downwelling Diffuse Shortwave Irradiance (dif)(difswfluxdn_measured)
  • Time offset from base_time(base_time)
  • Arithmetic Average Distance from the Earth to the Sun (au)(sun_earth_distance)
  • Site Identification(site)
  • Daily Averaged Distance from the Earth to the Sun (auavg)(sun_earth_distance_dailyaverage)
  • Measured Downwelling Summed Shortwave Irradiance
    (dirfluxdn_measured+diffluxdn_measured) (ssw)(sswfluxdn_measured)
  • Clear-sky Detection Flag (clrf)(flag_clearsky_detection)
  • Clear-sky Fit Coefficient a to Albedo (Alba)(coef_clearsky_albedo_a)
  • Clear-sky Fit Coefficient b to Albedo (Albb)(coef_clearsky_albedo_b)
  • north latitude for all the input platforms.(lat)
twpskyrad20sC1.a1:
  • Instantaneous PIR2 dome thermistor(pir2_dome_therm)
  • Instantaneous Uncorrected Downwelling Ultraviolet Irradiance, UV Biometer(inst_down_uvb_irradiance)
  • north latitude for all the input platforms.(lat)
  • Instantaneous PIR2 uncorrected irradiance(pir2_uncorr_irradiance)
  • Time offset of tweaks from base_time(time_offset)
  • Instantaneous UVB uncorrected irradiance(uvb_uncorr_irradiance)
  • altitude above sea levelaltunits(alt)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_dome_resist)
  • Instantaneous PIR1 uncorrected irradiance(pir1_uncorr_irradiance)
  • Instantaneous Downwelling Pyrgeometer Thermopile Voltage, Shaded Pyrgeometer(inst_down_long_hemisp_shaded_tp)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_case_resist)
  • Instantaneous UVB temperature(uvb_temp)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Unshaded
    Pyrgeometer(inst_down_long_unshaded_case_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
  • Instantaneous PIR1 dome thermistor(pir1_dome_therm)
  • Instantaneous PIR2 case thermistor(pir2_case_therm)
  • Time offset from base_time(base_time)
  • Instantaneous Downwelling Ultraviolet Biometer Temperature(inst_down_uvb_temp)
  • east longitude for all the input platforms.(lon)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Unshaded
    Pyrgeometer(inst_down_long_unshaded_dome_resist)
  • GPS raw data filename(filename)
  • 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 Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer(inst_down_long_shaded_case_resist)
  • Instantaneous Downwelling Pyrgeometer Thermopile, Unshaded Pyrgeometer(inst_down_long_hemisp_unshaded_tp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer(inst_down_long_shaded_dome_resist)
  • Instantaneous PIR1 case thermistor(pir1_case_therm)
twpskyrad60sC1.b1:
  • PIR1 unshaded minimum(pir1_min)
  • Downwelling Ultra-Violet Irradiance, UV Biometer(down_uvb)
  • NIP maximum(nip_max)
  • Bit data. See details.(bit_data)
  • PSP shaded maximum(psps_max)
  • Time offset of tweaks from base_time(time_offset)
  • east longitude for all the input platforms.(lon)
  • External voltage(external_voltage)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
  • IRT1 maximum(irt1_max)
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_unshaded_std)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Maxima(down_short_hemisp_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Maxima(down_short_diffuse_hemisp_max)
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Minima(down_long_hemisp_unshaded_min)
  • NIP standard deviation(nip_sd)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Maxima(down_long_hemisp_shaded_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
  • PIR shaded minimum(pirs_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Standard
    Deviation(down_long_hemisp_shaded_std)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)
  • IRT1 minimum(irt1_min)
  • PIR shaded standard deviation(pirs_sd)
  • PIR shaded mean(pirs_mean)
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer, Maxima(down_long_hemisp_unshaded_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Standard Deviation(down_short_diffuse_hemisp_std)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer(down_short_hemisp)
  • NIP minimum(nip_min)
  • PSP shaded standard deviation(psps_sd)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer(down_long_hemisp_shaded)
  • UVB standard deviation(uvb_sd)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
    Deviation(down_long_hemisp_shaded2_std)
  • PSP1 unshaded mean(psp1_mean)
  • Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
  • IRT1 mean(irt1_mean)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer,
    Minima(down_short_diffuse_hemisp_min)
  • altitude above sea levelaltunits(alt)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
  • PIR1 unshaded maximum(pir1_max)
  • Internal voltage(internal_voltage)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Maxima(down_uvb_max)
  • Downwelling Shortwave Diffuse Hemispheric Irradiance, Ventilated Pyranometer(down_short_diffuse_hemisp)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Standard
    Deviation(down_short_hemisp_std)
  • PIR shaded maximum(pirs_max)
  • PSP shaded mean(psps_mean)
  • UVB minimum(uvb_min)
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Standard Deviation(down_uvb_std)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Minima(short_direct_normal_min)
  • PIR1 unshaded mean(pir1_mean)
  • Time offset from base_time(base_time)
  • Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)
  • Shortwave Direct Normal Irradiance, Pyrheliometer(short_direct_normal)
  • Downwelling Longwave Hemispheric Irradiance, Unshaded Pyrgeometer(down_long_hemisp_unshaded)
  • PSP1 unshaded standard deviation(psp1_sd)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Maxima(short_direct_normal_max)
  • Internal Logger Temperature(logger_temp)
  • UVB maximum(uvb_max)
  • PIR1 unshaded standard deviation(pir1_sd)
  • Shortwave Direct Normal Irradiance, Pyrheliometer, Standard Deviation(short_direct_normal_std)
  • PSP shaded minimum(psps_min)
  • PSP1 unshaded maximum(psp1_max)
  • GPS raw data filename(filename)
  • IRT1 standard deviation(irt1_sd)
  • NIP mean(nip_mean)
  • Downwelling Shortwave Hemispheric Irradiance, Ventilated Pyrgeometer, Minima(down_short_hemisp_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
    Deviation(down_long_hemisp_shaded1_std)
  • Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
  • Downwelling Ultra-Violet Irradiance, UV Biometer, Minima(down_uvb_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer, Minima(down_long_hemisp_shaded_min)
  • north latitude for all the input platforms.(lat)
  • UVB mean(uvb_mean)
  • PSP1 unshaded minimum(psp1_min)
twpskyradC1.00:
  • Raw data stream - documentation not supported(Raw data stream - documentation not supported)

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DQRID : D051119.1
Start DateStart TimeEnd DateEnd Time
11/13/2005010001/10/20060145
Subject:
TWP/SKYRAD/C1  - IRT failure
DataStreams:twpskyrad60sC1.b1
Description:
A moisture related fault was found in the IRT cable after a day of very heavy rain. The 
cable was replaced but the internal power supply was apparently damaged. The instrument was 
replaced with a spare IRT.
Measurements:twpskyrad60sC1.b1:
  • Sky/Cloud Infra-Red Temperature Minima(sky_ir_temp_min)
  • Sky/Cloud Infra-Red Temperature Maxima(sky_ir_temp_max)
  • Sky/Cloud Infra-Red Temperature(sky_ir_temp)
  • Sky/Cloud Infra-Red Temperature Standard Deviation(sky_ir_temp_std)

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DQRID : D051202.5
Start DateStart TimeEnd DateEnd Time
08/02/2004020009/09/20052022
Subject:
TWP/SKYRAD/C1 - Reprocess: Incorrect datalogger program affecting PIR1 and PIR2 
downwelling longwave
DataStreams:twpskyrad20sC1.a0, twpskyrad60sC1.b1
Description:
The excitation delays using in measuring the PIR1 case thermistor commonly named "Case1" 
and the PIR2 dome thermistor called "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.

Users can apply temperature dependent irradiance corrections shown in the table below.  
Recall that the reported uncertainty of PIRs is typically +-.25% to +-.5% or 1 to 2 W/m2. 
The error corrections become the same order of magnitude or larger than the instrument 
uncertainties at or below 260K or 9F. 

Irradiance Correction Table for Skyrad (TWP and NSA) DIR1 and DIR2 Irradiance

		DIR1	DIR1	DIR2	DIR2
	T[F]	Tcase[K]	Correction[W/m2]	Tdome[K]       
		Correction[W/m2]
	109.4	316.13	0.00	316.13	0.00
	100.5	311.20	-0.15	311.20	0.12
	93.2	307.14	-0.12	307.14	0.10
	87.0	303.70	-0.10	303.70	0.08
	81.6	300.70	-0.17	300.70	0.14
	77.0	298.15	-0.22	298.15	0.18
	59.4	288.35	-0.34	288.35	0.27
	47.4	281.72	-0.23	281.72	0.18
	38.5	276.74	-0.42	276.74	0.34
	31.3	272.77	-0.48	272.77	0.38
	25.4	269.48	-0.61	269.48	0.49
	20.3	266.67	-0.67	266.67	0.54
	16.0	264.25	-0.82	264.25	0.66
	12.1	262.11	-0.98	262.11	0.79
	8.7	260.19	-0.97	260.19	0.78
	5.6	258.46	-1.07	258.46	0.86
	2.7	256.89	-1.17	256.89	0.94
	0.1	255.44	-1.33	255.44	1.07
	-2.3	254.11	-1.41	254.11	1.13
	-4.5	252.87	-1.43	252.87	1.15
	-6.6	251.71	-1.52	251.71	1.22
	-8.5	250.63	-1.63	250.63	1.31
	-10.4	249.62	-1.73	249.62	1.39
	-12.2	248.58	-1.79	248.58	1.44
	-15.4	246.82	-1.93	246.82	1.55
	-18.3	245.23	-2.05	245.23	1.65
	-20.9	243.78	-2.22	243.78	1.78
	-23.3	242.44	-2.36	242.44	1.89
	-25.5	241.21	-2.58	241.21	2.07
	-27.5	240.07	-2.65	240.07	2.13
	-29.5	239.01	-2.75	239.01	2.21
	-31.3	238.00	-3.02	238.00	2.42
Measurements:twpskyrad20sC1.a0:
  • Instantaneous Downwelling Pyrgeometer Thermopile, Shaded Pyrgeometer2(inst_down_long_hemisp_shaded2_tp)
  • 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 Thermopile, Shaded Pyrgeometer1(inst_down_long_hemisp_shaded1_tp)
  • Instantaneous Downwelling Pyrgeometer Dome Thermistor Resistance, Shaded
    Pyrgeometer1(inst_down_long_shaded1_dome_resist)
  • Instantaneous Downwelling Pyrgeometer Case Thermistor Resistance, Shaded
    Pyrgeometer2(inst_down_long_shaded2_case_resist)
twpskyrad60sC1.b1:
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Standard
    Deviation(down_long_hemisp_shaded2_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2(down_long_hemisp_shaded2)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Maxima(down_long_hemisp_shaded1_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Standard
    Deviation(down_long_hemisp_shaded1_std)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Maxima(down_long_hemisp_shaded2_max)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1(down_long_hemisp_shaded1)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer1, Minima(down_long_hemisp_shaded1_min)
  • Downwelling Longwave Hemispheric Irradiance, Shaded Pyrgeometer2, Minima(down_long_hemisp_shaded2_min)

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DQRID : D060630.31
Start DateStart TimeEnd DateEnd Time
08/02/2004020012/21/20052205
Subject:
TWP/SKYRAD/C1 - Reprocess: Longwave Calibration error
DataStreams:twpskyrad60sC1.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:twpskyrad60sC1.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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