Method for processing gps deformation monitoring data

Abstract

The invention provides a method for processing global position system (GPS) deformation monitoring data. The method for processing the GPS deformation monitoring data comprises (1) obtaining present epoch observation data and broadcast ephemeris data of a base station and a monitoring station, and forming a double-difference observation equation by using phase observation values; (2) setting a maximum deformation quantity between two epochs; (3) adopting a Cholesky to resolve and construct an ambiguity search space; (4) searching the ambiguity, and enabling a variance ratio to be larger than 3; (5) obtaining fixed solution coordinates X, Y and Z of a single epoch whole cycle ambiguity and a convariance matrix of the single epoch whole cycle ambiguity of a monitoring point; (6) using an average gap method to carry out deformation detection on a deformation value between a present epoch and a previous epoch; (7) after finishing the detection of (6), using a robust least square static solution by superposition of two epoch observation equations as a result of the present epoch, or obtaining a result of the present epoch according to a robust sequential adjustment. The method for processing the GPS deformation monitoring data is accurate.

Description

technical field [0001] The invention relates to a method for processing data, in particular to a method for processing GPS deformation monitoring data. Background technique [0002] With the development of GPS technology, GPS has been increasingly used for deformation monitoring. However, in the deformation monitoring environment, usually the multipath or diffraction signals are strong, resulting in a high frequency of cycle slips. Correlation least squares non-correlation adjustment method (LAMBDA), Cholesky decomposition search method, etc. all need to use the observation data information of multiple epochs within a period of time, and the observation data of these multiple epochs cannot have cycle slips. Otherwise it will be very difficult to determine the overall ambiguity. [0003] Therefore, in the application of deformation monitoring, the processing of GPS data generally adopts the single epoch solution method to avoid cycle slip detection, that is, according to th...

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Problems solved by technology

[0005] Aiming at the problem that the method for processing GPS deformation monitoring data in the prior art cannot avoid jumps, which makes it difficult to accurately warn according to the monitoring results, the present invention proposes a novel method for processing GPS deformation monitoring data

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