Modulation transfer analysis for the moderate resolution imaging spectroradiometer (MODIS-AM)

Francisco Rojas; Robert A. Schowengerdt; Stuart F. Biggar

doi:10.1117/12.453457

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18 January 2002 Modulation transfer analysis for the moderate resolution imaging spectroradiometer (MODIS-AM)

Francisco Rojas; Robert A. Schowengerdt; Stuart F. Biggar

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Proceedings Volume 4483, Earth Observing Systems VI; (2002) https://doi.org/10.1117/12.453457
Event: International Symposium on Optical Science and Technology, 2001, San Diego, CA, United States

Abstract

The accuracy of the MODerate Resolution Imaging Spectroradiometer (MODIS-AM) end data products is affected by the spatial response in the form of the Modulation Transfer Function (MTF). This effect is most noticeable near spatial transition periods where the contrast changes are high. This research effort estimates the MODIS MTF using a simplified model, based on Santa Barbara Research Center's MTF model. The simplified MTF model is incomplete, and, MTF validation laboratory data are used to complete the model by estimating the unknown parameters. The laboratory data were taken using the Internal Alignment Collimator, a line spread function calibration instrument. Using the completed MTF model, a MTF correction filter is derived. The filter corrects the along-scan and along-track optical blurring and the along-scan non-zero integration time. The filter reduces the Point Spread Response (PSR) footprint by sharpening the response. The correction filter is demonstra ted on MODIS level 1B data, using a scene from Mono Lake September 29, 2000 and a scene from the Maricopa Agricultural Center (MAC) September 26, 2000.

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Francisco Rojas, Robert A. Schowengerdt, and Stuart F. Biggar "Modulation transfer analysis for the moderate resolution imaging spectroradiometer (MODIS-AM)", Proc. SPIE 4483, Earth Observing Systems VI, (18 January 2002); https://doi.org/10.1117/12.453457

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