Simultaneous Automated Testing Of Thematic Mapper Dynamic Spatial Performance Characteristics

J. B. Young; P. E. Thurlow

doi:10.1117/12.947171

4 August 1988 Simultaneous Automated Testing Of Thematic Mapper Dynamic Spatial Performance Characteristics

J. B. Young, P. E. Thurlow

Proceedings Volume 0941, Automated Testing of Electro-Optical Systems; (1988) https://doi.org/10.1117/12.947171
Event: 1988 Technical Symposium on Optics, Electro-Optics, and Sensors, 1988, Orlando, FL, United States

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.

Citation Download Citation

J. B. Young and P. E. Thurlow "Simultaneous Automated Testing Of Thematic Mapper Dynamic Spatial Performance Characteristics", Proc. SPIE 0941, Automated Testing of Electro-Optical Systems, (4 August 1988); https://doi.org/10.1117/12.947171

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