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Proceedings Paper

Preliminary System Concepts For Modis: A Moderate Resolution Imaging Spectrometer For EOS
Author(s): W. L. Barnes; H. Ostrow; V. V. Salomonson
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Paper Abstract

Plans are underway at NASA/Goddard Space Flight Center to develop a moderate resolution (0.5-1.0 kilometer) imaging spectrometer with 104 spectral bands in the range from 0.4 to 14.2 micrometers for use as a NASA facility aboard the Earth Observing System (EOS). Science requirements call for the system to image the Earth's surface every 2 days for a period in excess of 10 years. Numerous and diverse tasks in the areas of terrestrial, oceanic, and atmospheric science require two electro-optical sensors. MODIS-T (tilt) is a sixty-four channel imaging spectrometer with 10-nanometer wide channels in the 0.4-1.0 micrometers spectral range. The system has 5 centimeter diameter optics, scans ±45°, and can be pointed in the range ±60° along track. Calculated S/N is in excess of 800:1 near 0.4 micrometers. MODIS-N (nadir) is a 40-channel imaging spectroradiometer that scans ±45° about nadir with twelve 500 meter and twenty-eight 1000 meter resolu-tion channels including two polarization channels and fourteen thermal infrared channels. With 20 centimeter diameter optics, the calculated S/N's of the majority of the reflected solar bands are over 1000:1. NETD for the thermal bands are on the order of 0.1-0.2 K at 300 K. Combined MODIS-T and MODIS-N data rates are 8.3 megabits per second in daylight, 1.5 megabits per second at night resulting in a total of 3.6 x 1011 bits per day.

Paper Details

Date Published: 7 July 1986
PDF: 8 pages
Proc. SPIE 0644, Remote Sensing, (7 July 1986); doi: 10.1117/12.964451
Show Author Affiliations
W. L. Barnes, NASA Goddard Space Flight Center (United States)
H. Ostrow, NASA Goddard Space Flight Center (United States)
V. V. Salomonson, NASA Goddard Space Flight Center (United States)

Published in SPIE Proceedings Vol. 0644:
Remote Sensing
Robert T. Menzies, Editor(s)

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