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Method for detecting and repairing cycle slip by utilizing BeiDou three-frequency observed quantity

A technology for cycle slip detection and observation, which is applied in the field of satellite navigation and precise positioning, and can solve problems such as poor reliability.

Inactive Publication Date: 2012-08-29
中国人民解放军61081部队
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

However, it only uses the dual-frequency information of a single satellite to repair the cycle slip, and the reliability is poor
[0006] It can be seen that the above methods have certain limitations

Method used

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  • Method for detecting and repairing cycle slip by utilizing BeiDou three-frequency observed quantity
  • Method for detecting and repairing cycle slip by utilizing BeiDou three-frequency observed quantity
  • Method for detecting and repairing cycle slip by utilizing BeiDou three-frequency observed quantity

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Embodiment Construction

[0082] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0083] Such as figure 1 As shown, the method for detecting and repairing cycle slips using the three-frequency observations of the Beidou satellite navigation system of the present invention includes:

[0084] Step S101, using the combined noise detection quantity to detect the cycle slip, which specifically includes:

[0085] 1. According to the carrier phase observation equation of the Beidou satellite navigation system, construct the combined noise detection quantity, such as figure 2 shown.

[0086] Among them, the carrier phase observation equation of the Beidou satellite navigation system is:

[0087]

[0088] In formula (2), the subscript i represents the i-...

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Abstract

The invention discloses a method for detecting and repairing a cycle slip by utilizing a BeiDou three-frequency observed quantity. The method mainly comprises the following steps of: 1, performing linear combination by utilizing the three-frequency observed quantity under the condition of providing a three-frequency signal by a BeiDou satellite navigation system, and constructing a combination noise detection quantity by selecting proper combination coefficients to detect the cycle slip; 2, after the cycle slip is detected, calculating and screening to obtain three sets of combination coefficients with superior performance in a pseudo-range carrier phase combination method, and calculating and repairing the cycle slip by utilizing the pseudo-range carrier phase combination method; and 3, finally, performing verification on a cycle-slip repairing effect by utilizing the combination noise detection quantity. The method for detecting and repairing the cycle slip is not related to the motion state of a carrier, can be used for reliably detecting and repairing the minimum cycle slip of which the time of losing lock reaches up to 30 seconds and can be used for detecting and repairing the cycle slip by the zero-difference, single-difference or double-difference carrier phase observed quantity when static measurement or dynamic measurement is performed.

Description

technical field [0001] The invention relates to the technical field of satellite navigation precision positioning, in particular to a method for detecting and repairing cycle slips by using three-frequency observations of the Beidou satellite navigation system in carrier phase measurement. Background technique [0002] Cycle slip detection and repair is a key technology for high-precision positioning based on carrier phase observations. The principle of satellite navigation and positioning is: when the satellite position is known, the geographic location of the receiver can be calculated by measuring the distance from multiple satellites to the same receiver. The receiver can obtain three types of observations of pseudorange, carrier phase and Doppler from each satellite signal. The carrier phase observation value consists of three parts: the initial full cycle unknown, the carrier phase full cycle number and the fractional part of the full cycle. Among them, the fractiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S19/23G01R25/00
Inventor 何海波刘淳郭海荣谢维华郑冲李琳
Owner 中国人民解放军61081部队
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