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. 2008 Dec 20;47(36):6796-810.
doi: 10.1364/ao.47.006796.

Cross calibration of ocean-color bands from moderate resolution imaging spectroradiometer on Terra platform

Ewa J Kwiatkowska  1 , Bryan A Franz, Gerhard Meister, Charles R McClain, Xiaoxiong Xiong
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Cross calibration of ocean-color bands from moderate resolution imaging spectroradiometer on Terra platform

Ewa J Kwiatkowska et al. Appl Opt. .

Abstract

Ocean-color applications require maximum uncertainties in blue-wavelength water-leaving radiances in oligotrophic ocean of approximately 5%. Water-leaving radiances from Moderate Resolution Imaging Spectroradiometer (MODIS) on the Terra satellite, however, exhibit temporal drift of the order of 15% as well as sensor changes in response versus scan and polarization sensitivity, which cannot be tracked by onboard calibrators. This paper introduces an instrument characterization approach that uses Earth-view data as a calibration source. The approach models the top of the atmosphere signal over ocean that the instrument is expected to measure, including its polarization, with water-leaving radiances coming from another well-calibrated global sensor. The cross calibration allows for significant improvement in derived MODIS-Terra ocean-color products, with largest changes in the blue wavelengths.

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