DQRID : D160919.1
Start DateStart TimeEnd DateEnd Time Data Quality Metric
05/03/2016165507/21/20162359Suspect
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Subject:
ASI/SASZE/M1 - Spectrometer chiller temperature variations
DataStreams:asisaszefilterbandsM1.a1, asisaszevisM1.a1
Description:
Spectrometer chiller temperature variations caused by an incorrectly placed sensor are 
apparent as correlated modulations in the signal from the UV-VIS CCD spectrometer. The 
magnitude of signal oscillation is small and is only apparent under clear sky for wavelengths 
< 450 nm. The variations were reduced to negligible levels by repositioning the sensor on 
Aug. 21, 2016.
Suggestions: 
Either avoid use of zenith irradiance < 450 nm during clear sky or apply a temporal 

smoothing function.
Measurements:asisaszefilterbandsM1.a1:
  • zenith_radiance_415nm
  • zenith_transmittance_440nm
  • zenith_radiance_368nm
  • zenith_transmittance_355nm
  • zenith_radiance_340nm
  • zenith_transmittance_368nm
  • zenith_radiance_387nm
  • zenith_radiance_355nm
  • zenith_transmittance_387nm
  • zenith_transmittance_340nm
  • zenith_radiance_440nm
  • zenith_radiance_408nm
  • zenith_transmittance_415nm
  • zenith_transmittance_408nm
more
asisaszevisM1.a1:
  • zenith_radiance
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