GNSS-based differential positioning method and its positioning system
A differential positioning and positioning terminal technology, applied in the field of communication, can solve the problems of distance error from satellite to positioning terminal, the positioning error becomes larger, and the position of the positioning terminal is not unified with the real position, so as to reduce the multi-path error, improve the positioning accuracy, Guaranteed effect of stability
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[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0054] like figure 1 As shown, the present invention provides a kind of differential positioning method based on GNSS, comprises the following steps:
[0055] S1. Receive the satellite signal transmitted by the satellite through the positioning terminal, and analyze the pseudo-range observation amount from the satellite signal;
[0056] Described pseudo-range observation quantity ρ is by formula ρ=c*(t u -t s ) is calculated, where, t s is the launch time of the satellite signal, t u is the time for the position...
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