Method for combining tri-band code wave pseudorange with carrier phase in satellite navigation and positioning

Abstract

The invention provides a method for combining a tri-band code wave pseudorange with a carrier phase in satellite navigation and positioning, relating to the technology of the satellite navigation and positioning. The method comprises the following steps of: using terminal equipment to receive the satellite downlink three code wave pseudoranges and the carrier phase; obtaining a code wave combined pseudorange and a carrier combined phase according to an integral coefficient combination, selecting a positive combination coefficient or a negative combination coefficient according to the principle that the time which is influenced by an ionosphere for closing to and solving ambiguity is short, and fast solving the ambiguity by the positive combination or the negative combination; and according to the principle that an ionosphere influence in a satellite-ground distance can be fast removed, selecting the combination coefficient to set up a double positive combination carrier wave which is used for removing the ionosphere influence in the satellite-ground distance, and using more than four (including four) pseudorange observation equations to solve the real position of the receiving terminal. The invention can set up a new system which not only can realize the high dynamic state of the code wave but also has the high precision of the carrier wave.

Description

technical field [0001] The invention relates to the technical field of satellite navigation and positioning, and relates to a carrier measurement method in navigation and positioning, in particular to a combination method of tri-frequency code wave pseudorange and carrier phase in satellite navigation. Background technique [0002] In the global navigation satellite system (GNSS), due to the error of the satellite clock and the receiver clock and the delay of the radio signal passing through the ionosphere and troposphere, there is a certain difference between the actual measured distance and the geometric distance from the satellite to the receiver. The actual measured distance is called pseudorange. The code wave measurement can be used for high dynamic ranging, but the accuracy is not high, and the receiving terminal can only achieve a pseudo-range measurement accuracy of the order of 1-10 meters. Because the wavelength of the carrier is much shorter than that of the ran...

AI Technical Summary

Problems solved by technology

The current tri-frequency combinations are limited to combinations without first-order ionospheric influence, and there are very few combinations available

The biggest weakness of the combination is that the noise is amplified in the combination. To suppress the noise, it can only be realized by long-time integration, which seriously limits the high dynamic application of the system.

Images