Positioning method for Beidou short baseline single frequency single epoch solution

Abstract

The invention discloses a positioning method for Beidou short baseline single frequency single epoch solution. The method comprises steps of (1) Beidou single frequency pseudorange single point positioning, (2) data preprocessing, (3) establishment of a Kalman filter precision n-dimension dynamic model based on prior historical data and consideration of influences of a signal-to-noise ratio and asatellite elevation angle on an observation value, (4) model initialization, (5) Beidou single-frequency part ambiguity estimation to obtain a fixed value of each hierarchical ambiguity, (6) cycle-slip epoch-by-epoch detection in combination of the single-frequency ambiguity fixed value and an updating value, and (7) baseline vector calculation and coordinate covariance matrix updating based on the fixed ambiguity, and back substitution to a carrier phase observation equation after the ambiguity is fixed to obtain a baseline vector. The method can automatically eliminate the influences of tropospheric errors and multipath errors in real time, and realize accurate fixation of Beidou single frequency ambiguity. While the real-time performance and the precision of monitoring are ensured, themonitoring cost is greatly reduced, and promotion and application of the Beidou positioning technology is facilitated.

Description

technical field [0001] The invention relates to the field of Beidou deformation monitoring in engineering survey, in particular to a positioning method for solving Beidou short baseline, single frequency, and single epoch. Background technique [0002] Currently, the BeiDou Navigation Satellite System (Beidou for short) can provide global navigation, timing and short message information services. The application of BeiDou positioning technology in the field of deformation monitoring has increasingly become one of the research hotspots. Cost is the key problem to be solved in Beidou deformation monitoring. Beidou deformation monitoring usually uses multi-frequency multi-mode geodetic receivers. The high cost seriously limits the popularization and application of Beidou in the field of deformation monitoring. For local deformation monitoring of engineering facilities, reference stations The baseline length of monitoring stations is generally short (≤10km). Therefore, it is of...

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Problems solved by technology

[0004] However, the above studies are all aimed at the combined positioning of Beidou, Beidou and GPS with multi-frequency and multi-mode receivers, and the research on high-precision positioning of Beidou single-frequency receivers, especially the static positioning of Beidou short-baseline single-frequency single-epoch solution Method research is less

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