Cross-calibration of ADEOS/OCTS and POLDER and the influence on aerosol retrieval Original Research Article

Comparison and combination of OCTS and POLDER, which are sister sensors mounted on the satellite ADEOS, are considered from a viewpoint of aerosol retrieval. First it is shown that the latest in-flight calibration coefficients for each sensor provide better consistency between two sensors. Then aerosol characteristics are extracted from the OCTS level-1b data and POLDER level-1 data respectively. From comparison of both results in respect of the retrieved aerosol properties, we found that Ångström exponent of aerosols is more strongly affected by the fluctuation of radiance than the aerosol optical thickness is. In other words, it is impossible for Ångström exponent to avoid the influence of observational error in radiance.