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This paper describes the design, implementation and performance evaluation of SenSearch, an outdoors, GPS assisted personnel tracking system using MICA motes. SenSearch is a mobile wireless ad-hoc network comprised of sensor nodes worn by users. These nodes store and forward information about the location of other nodes in an environment that lacks communication infrastructure. A key feature of SenSearch is that it does not require a continuously connected network for its operation. It is designed for a delay tolerant network that provides only occasional connectivity between nodes.
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