Start Date | Start Time | End Date | End Time | Data Quality Metric |
---|---|---|---|---|
12/27/2004 | 0000 | 02/16/2005 | 1930 | Does not affect quality |
Subject: | SGP/SIRS/E20 - Reprocessed and Corrected: Incorrect calibration coefficients |
DataStreams: | sgpsirs20sE20.a0, sgpsirsE20.b1, sgpsirsE20.00 |
Description: | DATA REPROCESSED and CORRECTED: Data were archived in September 2016. SGP/SIRS/E20 - Reprocessed data to correct calibration coefficients, as noted below. SUGGESTIONS: Shortwave instrument measurements: Back out original mV readings and then reapply correct calibration coefficients. DownwellingDiffuse(corrected) = (DiffusePSP(incorr)[W/m2]/118.49(incorr)[W/m2*mV])*115.32[W/m2*mV) UpwellingShortwave = (US/121.67)*126.36 DirectShortwave=(NIP/123.58)*117.99 DownwellingShortwave = (DS/119.23)*126.47 Longwave instrument measurements: Back out original mV readings from NetIR and case and dome thermistor values from b1 file and reapply longwave eqn. described in the SIRS handbook (http://www.arm.gov/publications/tech_reports/handbooks/sirs_handbook.pdf section 7)using the correct calibration coefficients. UpwellingIRnet[uV](corrected) = (UIRnet[W/m2]/0.23585(incorr)[W/m2*uV])*0.2371(corr)[W/m2*uV) Then apply K0=-21.18(W/m2),K1=.2731(W/m2*uV),K2=1.0400,K3=-2.4460,Kr=7.044E-4 to the 4 coefficient eqn described in sec7 of the SIRS handbook DownwellingIRnet[uV](corr) = (DIRnet/0.27855)*0.2455 then apply K0=-21.19(W/m2),K1=.2455(W/m2*uV),K2=1.0390,K3=-2.4910,Kr=7.044E-4 ORIGINAL DQR CATEGORY: Red( Incorrect) REPROCESSED and CORRECTED DATA ARCHIVED:2016-09 REPROCESS IDENTIFICATION NUMBER: RID 187 --------------------------------------------------- --- ORIGINAL DQR DESCRIPTION --- --------------------------------------------------- Sometime during the day of 12/27/2004(first avialable day of data) or 12/24-12/26 (no archive data available) the SIRS datalogger at E20 was loaded with an old version of an E20 program. The calibration coefficients and serial numbers do not match those installed. Field techs installed a correct datalogger program on 1/19/2005 1900GMT. However, sometime during 1/20/2005 the datalogger reverted to the wrong program again without user intervention. On 2/16/2005 the correct SIRS program was reloaded on the E20 datalogger. |
Suggestions: | |
Measurements: | sgpsirs20sE20.a0: more
sgpsirsE20.00: more sgpsirsE20.b1: more |