E. H. Takken

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Methods of computing impulse-response weights of 1- and 2-D matched filters and LMS filters for suppressing clutter in an electrooptic sensor's output are developed and illustrated with examples. The methods are applicable to signals from scanning or staring sensors viewing point or extended sources against variable backgrounds, provided signal shape and(More)
An analytic model is developed for the mean and clutter infrared radiance emitted from the ocean surface near the horizon and in the presence of solar glint. The model is based on the identification of a characteristic facet dimension over which the ocean surface is essentially flat. Fluctuations in the facet orientation generated by the water wave motion(More)
This report finds that a light weight, passive collision avoidance (PCAS) system based on uncooled LWIR sensors is feasible for Hunter/Predator class UAVs. The candidate PCAS system is analyzed using a statistical measure based on warning time provided. Typically warning times of 10s of seconds could be provided with very low probability of missed detection(More)
Several 1-D signal processing techniques have been evaluated by simulation with a digital computer using high-spatial-resolution (0.15 mrad) noise data gathered from back-lit clouds and uniform sky with a scanning data collection system operating in the 4.0-4.8-microm spectral band. Two ordinary bandpass filters and a least-mean-square (LMS) spatial filter(More)
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