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Proceedings Paper

Modulation transfer analysis for the moderate resolution imaging spectroradiometer (MODIS-AM)
Author(s): Francisco Rojas; Robert A. Schowengerdt; Stuart F. Biggar
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Paper 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.

Paper Details

Date Published: 18 January 2002
PDF: 9 pages
Proc. SPIE 4483, Earth Observing Systems VI, (18 January 2002); doi: 10.1117/12.453457
Show Author Affiliations
Francisco Rojas, Univ. of Arizona (United States)
Robert A. Schowengerdt, Univ. of Arizona (United States)
Stuart F. Biggar, Optical Sciences Ctr./Univ. of Arizona (United States)

Published in SPIE Proceedings Vol. 4483:
Earth Observing Systems VI
William L. Barnes, Editor(s)

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