| 摘要 |
<p>A method of accurate determination of a fixed position using global positioning system uses pseudo-range output over a predetermined measurement period from a stand-alone GPS receiver located at the fixed position, the pseudo-range output being measured from an ensemble of space vehicles at each time t over the measurement period, and historical ephemerides of the ensemble of space vehicles over the same measurement period to eliminate errors caused by selective availability. The historical ephemerides of the ensemble of space vehicles corresponding to each measurement time t are determined, and using the pseudo-range output and the historical ephemerides, a position solution at each time t is computered. The accurate position in earth-centered earth-fixed coordinates is then the average of all the position solutions at each time t over the measurement period.</p> |
