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The location of a downed aircraft can be estimated to within kilometers by optically processing the Dopplershifted emergency signal transmitted by the aircraft and received by a satellite. The process is described together with practical problems. A multichannel processor is proposed in which the output information is contained in the x, y, and z coordinates of the image space. An experimental processor is described.
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Aitken et al. (1980) studied this question.
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