Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1994-05-27
1997-04-29
Blum, Theodore. M.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
342457, H04B 7185, G01S 502
Patent
active
RE0354988
ABSTRACT:
Signals from a number of NAVSTAR global positioning system (GPS) satellites (11,12,13,14) are received by a receiver (16) in a vehicle (15) and a segment of the signals is stored in a memory (18) prior to retransmission by a transmitter (19). A base station (35) receives these transmissions from the mobile unit using a first receiver (36). The base station also receives signals directly from the NAVSTAR GPS satellites using a second receiver (38). A control and calculating apparatus (37) within the base station can determine the ephemeris (course) information for the satellites and can measure the transmission times or propagation delays of signals between the satellites and the vehicle and with this information the control and calculating apparatus can calculate the position of the vehicle unit.
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B.D. Nordwall, "GPS Could Improve Sonobuoys, Radiosondes", Aviation Week & Space Technology, Oct. 18, 1993, pp. 71 and 73.
McConnell et al, "GPS Translator Tracking System Implementations at Test Ranges", IEEE 1983 National Telesystems Conference, Nov. 14-16, 1983, San Francisco, CA, pp. 239-245, 239 and 243, Figs. 1, 6 and 7.
Wells, "Translated GPS Real-Time Tracking", IEEE 1983 National Telesystems Conference, Nov. 14-16, 1983, San Francisco, CA, pp. 260-264.
Blum Theodore. M.
Gathman Laurie E.
U.S. Philips Corporation
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