Background Clutter Leakage Estimation In A Mosaic Sensor Whose Field Of View Moves Relative To The Background

J. L. Rapier

doi:10.1117/12.955837

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9 November 1977 Background Clutter Leakage Estimation In A Mosaic Sensor Whose Field Of View Moves Relative To The Background

J. L. Rapier

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Proceedings Volume 0124, Modern Utilization of Infrared Technology III; (1977) https://doi.org/10.1117/12.955837
Event: 21st Annual Technical Symposium, 1977, San Diego, United States

Abstract

This paper examines the basic equation for clutter leakage in an optical system and discusses approximation techniques for rapid estimation of noise-equivalent target as a function of background PSD, optical system parameters, range and rate of motion of the sensor FOV relative to the background. Approximations which were developed for the conventional single-break-point PSD with a slope of -12 dB/octave, with a system using frame-to-frame differencing over an extended range of FOV motion rate are included as an appendix. A new method is derived, valid for low rates of FOV motion and a more general PSD, which can be approximated by a broken-line Bode plot. This method is extended to cover Nth order frame differencing and two-dimensional FOV motion, with the background viewed from a direction other than perpendicular to the surface. Given a specific optical system observing a specific background with any typical PSD, clutter leakage will display a dependence on FOV motion rate proportional to VN, where V is the motion rate, and N is the order of frame-differencing used for clutter rejection. This result is independent of the shape of the PSD curve for usual PSD's and system parameters.

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J. L. Rapier "Background Clutter Leakage Estimation In A Mosaic Sensor Whose Field Of View Moves Relative To The Background", Proc. SPIE 0124, Modern Utilization of Infrared Technology III, (9 November 1977); https://doi.org/10.1117/12.955837

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