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Proceedings Paper

Modeling and measuring scan modulation of an infrared seeker
Author(s): Linda M. Howser
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Paper Abstract

A recently developed model of a spin-scanning infrared seeker increases the accuracy of signal processing evaluations and seeker performance predictions compared with previous models. The simulation includes the effects of targets and backgrounds, seeker scanning and detector signals, gyroscope dynamics, signal processing, and acquisition and tracking. The model also incorporates realistic representations of noise, look-angle-dependent optical blur, gyroscope errors, and scan modulation. This modulation is caused by magnetic coupling from the gyroscope system and by radiation from the seeker dome and internal components. The result is artifacts on the detector waveforms that interfere with target detection. Aerothermal and laser-heating tests have been conducted to measure the optical scan modulation from the dome and internal components. Seeker waveforms as well as dome and component temperatures were measured to provide data for modeling the heating effects. These measurements are used to predict performance degradation caused by aerothermal heating of the seeker in flight.

Paper Details

Date Published: 10 June 1996
PDF: 10 pages
Proc. SPIE 2743, Infrared Imaging Systems: Design, Analysis, Modeling, and Testing VII, (10 June 1996); doi: 10.1117/12.241952
Show Author Affiliations
Linda M. Howser, Johns Hopkins Univ. (United States)

Published in SPIE Proceedings Vol. 2743:
Infrared Imaging Systems: Design, Analysis, Modeling, and Testing VII
Gerald C. Holst, Editor(s)

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