| 摘要 |
The invention concerns a method for calculating the instantaneous characteristics of a satellite in orbit, equipped with a GNSS receiver, capable of performing measurements of pseudo-distance, when fewer than four transmitters are in simultaneous visibility. Said method comprises the following stapes: a first step (20) pre-processing the amounts measured by the receiver, to deliver instantaneous measurements of pseudo-distance, pseudo-speed and pseudo-acceleration; a second step (21) which consists in mathematically processing said measurements enhanced by the knowledge of complementary data concerning the satellite orbit and the receiver, delivering several solutions; a third step (22) which consists in physically filtering said solutions delivering the position and the speed of the receiver satellite and the clock bias and drift of the receiver-
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