DQRID : D050118.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
12/27/2004000002/16/20051930Does not affect quality
more
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:
  • inst_up_long_hemisp_tp
  • inst_direct_normal
  • inst_global
  • inst_down_long_hemisp_shaded_tp
  • inst_diffuse
  • inst_up_short_hemisp
more
sgpsirsE20.00:
  • Raw data stream - documentation not supported
more
sgpsirsE20.b1:
  • down_short_hemisp_std
  • short_direct_normal
  • down_short_hemisp_max
  • down_long_hemisp_shaded_max
  • up_long_netir
  • up_long_hemisp_max
  • up_long_hemisp_std
  • down_short_diffuse_hemisp
  • down_long_hemisp_shaded_std
  • short_direct_normal_min
  • down_short_diffuse_hemisp_min
  • down_short_diffuse_hemisp_std
  • down_short_diffuse_hemisp_max
  • up_short_hemisp_max
  • up_short_hemisp
  • up_short_hemisp_std
  • down_short_hemisp
  • down_long_hemisp_shaded_min
  • down_long_hemisp_shaded
  • short_direct_normal_std
  • up_long_hemisp
  • up_long_hemisp_min
  • up_short_hemisp_min
  • short_direct_normal_max
  • down_long_netir
  • down_short_hemisp_min
more

Close this window