A possible role for satellites in search and rescue (SAR) operations was investigated. This effort involved a review of SAR requirements, spaceborne alarm and position reporting (ALPR) techniques, and the operational or planned spacecraft which might be available for piggybacking the ALPR payload. Several system concepts were then developed to perform the ALPR functions. The candidates were screened and the preferred system concepts were chosen for their effectiveness in saving lives and their relative costs. The preferred system concepts were: a three geostationary satellite OPLE concept and a five polar satellite Range/Range concept.


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