Beidou-three-carrier-based signal single epoch method for determining dynamic-dynamic ambiguity

Abstract

The invention discloses a Beidou-three-carrier-based signal single epoch method for determining dynamic-dynamic ambiguity. With the method, problems that the baseline distance is long, the real-time performance is poor, and reliability can not be guaranteed during double-frequency dynamic ambiguity determination according to the existing dynamic-dynamic positioning technology can be solved. With the three-frequency signal of the beidou, a single epoch method for determining short-distance dynamic-dynamic positioning ambiguity reliably in real time is provided. On the basis of a geometry-based mode, certain observation value quality control is carried out by combining an M-W geometry-free model; and the ionosphere residual of the short baseline is ignored and the ambiguity is determined by steps. The method mainly comprises three steps: (1), determining ultra-wide lane ambiguity N(0,-1,1) by using an original pseudo range and an ultra-wide lane phase observation value; (2), determining two wide lane ambiguity values N(1,0,-1) and N(1,-1,0) by using the ultra-wide lane observation value; and (3), determining ambiguity values N1, N2, and N3 of three original frequencies by using the wide lane observation value. Therefore, ambiguity of dynamic-dynamic positioning of the short baseline can be determined reliably in real time.

Description

technical field [0001] The invention belongs to the technical field of real-time dynamic determination of Beidou tri-frequency ambiguity, and relates to a carrier phase ambiguity resolution method, in particular to a single-epoch determination algorithm of motion ambiguity based on Beidou satellite navigation system tri-frequency signals. Background technique [0002] The dynamic-to-dynamic relative positioning technology is a technology developed to solve the problem of high-precision relative positioning between two dynamic carriers. The base station does not need to be fixed. After the ambiguity is fixed correctly, the relative position between the base station and the rover can be accurately determined in real time. , so this positioning method can be widely used in scenarios such as carrier attitude determination, relative height difference measurement, spacecraft rendezvous and docking in the air, aircraft aerial refueling, or carrier-based aircraft landing. Therefore,...

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Problems solved by technology

[0006] The present invention mainly solves the problems that the baseline distance of dual-frequency dynamic determination ambiguity is short, the real-time performance is poor, and the reliability cannot be guaranteed in the existing dynamic positioning technology; the use of triple-frequency signals provides a real-time and reliable short-distance dynamic determination method. Single Epoch Method for Locating Ambiguity

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