Preliminary vicarious calibration for EOS-AM1/ASTER with field campaigns

Computer Science

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Scientific paper

A comparison of the field campaign data, acquired at the test site in Tsukuba, Japan on 13 and 14 December, by the participated institutes is made for the assessment of the vicarious calibration for EOS-AM1/ASTER instrument to be launched in 1999. Solar irradiance, target spectral reflectance, etc. are acquired and compared together with calculated optical thickness (in total, molecule, aerosol, ozone, water vapor), the Top Of the Atmosphere (TOA) radiance, etc. Also an error budget analysis is made to confirm a major error sources for vicarious calibration. An error budget analysis of the vicarious calibration for ASTER was conducted. The results shows that around 4.2 (%) of Root Mean Square (RMS) error of vicarious calibration can be achieved. One of the major factor on the vicarious calibration is EXO atmospheric irradiance. Analysis of the data of 3 years' measurements indicates that approximately 2.5 (%) of error due to EXO atmospheric irradiance should be taken into account.

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