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Proceedings Paper

Assessment of MODIS on-orbit spatial performance
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Paper Abstract

The Terra and Aqua satellites are part of NASA’s Earth Observing System and both satellites host a nearly-identical Moderate Resolution Imaging Spectroradiometer (MODIS). Of the 36 MODIS spectral bands mounted among four Focal Plane Assemblies (FPAs) two have a 250 meter spatial resolution at nadir. Five bands have a spatial resolution of 500 meters, while the remaining bands make observations at 1 kilometer resolution. MODIS is equipped with a suite of onboard calibrators to track on-orbit changes in key sensor performance parameters. The Spectro-Radiometric Calibration Assembly (SRCA) contains a calibration source that allows on-orbit assessment of MODIS spatial performance, providing information on current band-to-band registration (BBR), FPA-to-FPA registration (FFR), detector-to-detector registration (DDR), modulation transfer function (MTF), and instantaneous field-of-view (IFOV). In this paper, we present the methodology of the on-orbit spatial calibrations using SRCA and the results of these key spatial parameters. The MODIS spatial characteristics, measured on-orbit, are compared against design specifications and pre-launch measurements.

Paper Details

Date Published: 12 October 2015
PDF: 14 pages
Proc. SPIE 9639, Sensors, Systems, and Next-Generation Satellites XIX, 963910 (12 October 2015); doi: 10.1117/12.2194114
Show Author Affiliations
Daniel Link, Science Systems and Applications, Inc. (United States)
Xiaoxiong Jack Xiong, NASA Goddard Space Flight Ctr. (United States)
Zhipeng Wang, Science Systems and Applications, Inc. (United States)

Published in SPIE Proceedings Vol. 9639:
Sensors, Systems, and Next-Generation Satellites XIX
Roland Meynart; Steven P. Neeck; Haruhisa Shimoda, Editor(s)

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