| 摘要 |
<p>A trilateration positioning system comprising: a plurality of transmitters having known ephemerides that transmit dual frequency ephemeris and time data wherein at least one of said transmitters is beyond earth orbit; a plurality of transmitter clocks providing time data to each of said transmitters; a receiver that receives said dual frequency ephemeris and time data from four or more of said transmitters and uses trilateration to determine the location of said receiver; and a receiver clock providing time data to said receiver.</p> |
