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Proceedings Paper

Simultaneous Automated Testing Of Thematic Mapper Dynamic Spatial Performance Characteristics
Author(s): J. B. Young; P. E. Thurlow
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Paper Abstract

This paper reviews automated methods and procedures used in the final stages of Thematic Mapper dynamic testing. The Thematic Mapper (TM) is a scanning, multispectral mapping radiometer having a 16 inch aperture and a focal plane array of 100 detectors covering 7 spectral bands. From a polar orbit of 705 km., TM scans a ground track 185 km. wide, using an oscillating plane mirror to view the earth surface. The scan mirror is attached to the telescope frame, raising the possibility of coupling significant vibration displacements into the electro-optical system. An important aspect of TM dynamic spatial testing (in vacuum) was to determine deviations from ideal spatial performance, as might be influenced by scan mirror operation, in the following areas: (1) Channel-to-channel (cross-scan) IFOV registration. (2) Spectral band-to-band (along scan) IFOV registration. (3) Scan slope and linearity in two directions. (4) Vibration-induced scan-to-scan IFOV footprint jitter. By designing a suitable test arrangement and software, as well as a unique two-dimensional reticle pattern, it was possible to automatically collect and analyze a composite data set which provided all of the above measurements, and demonstrated that system performance in these areas was within specifications.

Paper Details

Date Published: 4 August 1988
PDF: 6 pages
Proc. SPIE 0941, Automated Testing of Electro-Optical Systems, (4 August 1988); doi: 10.1117/12.947171
Show Author Affiliations
J. B. Young, Santa Barbara Research Center (United States)
P. E. Thurlow, Santa Barbara Research Center (United States)

Published in SPIE Proceedings Vol. 0941:
Automated Testing of Electro-Optical Systems
John Nestler; Philip I. Richardson, Editor(s)

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