Limits on line-of-site jitter derived from image resolution requirements

Statistics – Methodology

Scientific paper

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Scientific paper

Requirements for image resolution can be used to set upper limits on the allowable line-of-site (LOS) motion of an acquisition, tracking, and pointing (ATP) system. Image resolution is important for image-based tracking algorithms and for typical ancillary requirements for target phenomenology data gathering. During the system design phase of an ATP platform, base-motion- disturbance details such as total rms power and spectral distribution of this power may not be known for primary disturbance sources such a gimbals, cooling systems, and steering mirrors. In this case, setting upper limits to allowable LOS jitter is an important criteria in the trade study analyses for these components. The effect of jitter is frequency dependent and can be partitioned into regimes based on the image sample rate of the system. The application of image-resolution requirements for the High Altitude Balloon Experiment are used to set allowable LOS motion for random, sinusoidal, and linear disturbances. Three frequency regimes are identified with different allowable-motion amplitudes. This top-level systems methodology can be applied to many imaging applications such as estimating the blur induced by wind loading of ground based telescopes.

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