Derivation of the MODIS Aqua Point-Spread Function ocean color bands

Gerhard Meister; Yuqin Zong; Charles R. McClain

doi:10.1117/12.796980

20 August 2008 Derivation of the MODIS Aqua Point-Spread Function ocean color bands

Gerhard Meister, Yuqin Zong, Charles R. McClain

Proceedings Volume 7081, Earth Observing Systems XIII; 70811F (2008) https://doi.org/10.1117/12.796980
Event: Optical Engineering + Applications, 2008, San Diego, California, United States

Abstract

The Moderate Resolution Imaging Spectroradiometer (MODIS) on the Earth Observing System (EOS) Aqua platform has 9 spectral bands with center wavelengths from 412nm to 870nm that are used to produce the standard ocean color data products. Ocean scenes usually contain high contrast due to the presence of bright clouds over dark water. The MODIS has been characterized for straylight effects prelaunch. In this paper, we derive Point-Spread Functions for the MODIS Aqua ocean bands based on the prelaunch Near-Field Response measurements. We use Harvey-Shack coefficients derived by the system vendor Santa Barbara Remote Sensing. The crucial step in the derivation of the Point-Spread Function is the normalization of the Harvey-Shack coefficients relative to the center pixel. The straylight contamination of ocean scenes is evaluated based on artificial test scenes. Furthermore, the dependence of top-of-atmosphere radiances and ocean color products on proximity to a cloud is analyzed, and a straylight correction algorithm is proposed.

Citation Download Citation

Gerhard Meister, Yuqin Zong, and Charles R. McClain "Derivation of the MODIS Aqua Point-Spread Function ocean color bands", Proc. SPIE 7081, Earth Observing Systems XIII, 70811F (20 August 2008); https://doi.org/10.1117/12.796980

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