Method and system for real time - position determination by means of radio satellites, in particular gps - satellite

摘要

Process for the location of points to the surface of the earth in which it picks up simultaneously in a station of the reference coordinates known and on a mobile which is displaced on the points to be located, the radiofrequency signals transmitted on two frequencies (l1 and l2) in the direction of the ground by a constellation of satellites, and it uses a treatment for the initialization by which it determines the phase ambiguity on the signals from the various satellites observed, as well as a kinematic processing making it possible, at the end of the treatment of initialization, to follow the phase of the signals for the mobile moves, characterized in that the treatment of initialization implements a determination of the coordinates of points on the basis of combinations of measurements of the phases corresponding to two visible frequencies (l4 and l5) of wavelengths greater than those of the emission frequencies (l1 and l2) of the constellation of satellites, and in that it is combined linearly the measurements from the pallets of ambiguities performed at each of these two frequencies so that their noise is cancelled out.