A GNSS receiver, two-way carrier phase pseudo-range smoothing method

Abstract

The invention discloses a GNSS (Global Navigation Satellite System) receiver double channel carrier wave phase pseudorange smoothing method, comprising receiving signals transmitted by a navigation satellite to obtain positioning data; a first filter executing a k1st carrier wave phase smoothing pseudorange algorithm according to the positioning data to obtain a first carrier wave phase smoothing pseudorange; a second filter executing a k2nd carrier wave phase smoothing pseudorange algorithm according to the positioning data to obtain a second carrier wave phase smoothing pseudorange; and determining a carrier wave phase smoothing pseudorange of the two carrier wave phase smoothing pseudoranges having a greater epoch value as the carrier wave phase smoothing pseudorange of the positioning data, wherein the difference between epoch k1 and epoch k2 is M / 2. The method alternatively initializes the first filter and the second filter, always outputs smoothing results having epoch values greater than M / 2, and has higher precision; in case of cycle slips, the method can eliminate the cycle slip influence to smoothing precision caused by satellite lock-lose in a short time.

Description

technical field [0001] The invention relates to the field of GNSS (Global Navigation Satellite System, Global Navigation Satellite System) receiver positioning, in particular to a GNSS receiving, double-path carrier phase pseudo-range smoothing method. Background technique [0002] In the field of GNSS receiver positioning, each GPS satellite sends its exact position and the start time of sending signals. After the receiver receives these signals, it calculates the receiver's arrival time according to the time interval between the satellite sending signals and receiving signals. The distance between each satellite, because ranging is affected by atmospheric delay and receiver clock and satellite clock asynchronous, this distance is not a geometric distance, so it is called "pseudo-range", when the distance between the receiver and each satellite is calculated After the pseudo-range is obtained, the position of the receiver on the surface of the earth is determined by using t...

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Problems solved by technology

[0006] The embodiment of the present invention provides a GNSS receiver and a two-way carrier phase pseudorange smoothing method to solve the problem of carrier phase smoothed pseudorange obtained by the calculation when the filter runs operations with small epoch values ​​after each initialization. The compression effect on the coarse code pseudo-range error is poor, and the smoothing accuracy is low

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