Naval Surface Warfare Center, Carderock Division, 9500 MacArthur Blvd., West Bethesda, MD 20817-5700

66 -- POSITIONING & TRACKING SYSTEM SOL N0016797Q0181 DUE 081397 POC Fran Cooley 301-227-5669; Joyce Bell, Contracting Officer, 301-227-1113 The Naval Surface Warfare Center requires one each of a precise positioning and tracking system, for the purpose of tracking a moving vessel across a signature measurement range. The system shall be supplied complete and ready to use. The system shall consist of three basic parts -- a base station and two mobile rovers. The specified system shall be accurate to within one foot or better. The system shall be capable of tracking two rovers simultaneously. The rovers shall be packaged for shipboard use. A RF datalink shall transmit/receive differential codes and telemeter raw tracking information from the GPS receiver of the rovers. The radios used for this datalink shall be synthesized to allow for the changing of frequencies. The precise positioning and tracking system shall be configured as follows: at the base station site, the system shall comprise a DGPS reference receiver and a synthesized RF modem transceiver. The RF datalink shall transmit the GPS correction factors from the reference receiver to the rovers once per second and within the same second, receive corrected DGPS positions from the rovers. For each rover, the system shall consist of a GPS differential receiver, a synthesized RF modem transceiver. a mobile battery set, a GPS antenna and a RF antenna. All equipment shall be capable of operating at temperatures between minus 25 degrees Celsius and plus 55 degrees Celsius with up to 100% humidity in a marine environment. The equipment for each rover shall be packaged in a single weatherproof case. Each piece of electronic equipment shall include a technical manual describing assembly, installation, operation, maintenance and troubleshooting. The manufacture shall warrant all hardware and software for a minimum of twelve months after delivery. (0204)

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