Method for stability analysis of reference point for GNSS automatic deformation monitoring

Abstract

The invention discloses a method for stability analysis of reference point for GNSS automatic deformation monitoring, which comprises the following steps: calculating the GNSS observation data to obtain the coordinate residual time series of the reference point; detecting and removing rough errors in the coordinate residual time series of the reference point; extracting and removing the linear trend and the cyclical term in the series; conducting interpolation to the time series if there exist missing data in the coordinate residual time series after the removal of the trend and the cyclical term; extracting the common-mode error of the residual time series and removing the common-mode error from each residual series; and finally, using a quantification calculating method to determine whether the remaining residual series follows a normal distribution or not. If it is, then the reference point is regarded as stable; otherwise, instable. According to the invention, it can effectively eliminate the common error of a station, improve the signal-to-noise ratio of the coordinate time series, and finally make the main error of the coordinate time series of the station limited to observed random noise to judge whether the station is stable or not.

Description

technical field [0001] The invention relates to a reference point stability analysis method for GNSS automatic deformation monitoring. Background technique [0002] GNSS has the advantages of wide coverage, not limited by climatic conditions, no need for line-of-sight conditions, and high degree of automation. Therefore, GNSS has been widely used in the field of deformation monitoring in recent years, and satisfactory results have been obtained. [0003] In the GNSS automatic deformation monitoring system, one or two stable points are usually selected as the reference point, but how to judge whether the reference point is stable or not, there is still no set of specific methods. In the actual GNSS monitoring process, due to the influence of factors such as plate movement, solid tide, soil water and other mass loads, the station coordinates will have corresponding errors. For the judgment of the position change itself, the existing technology often adopts complex modeling me...

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Problems solved by technology

[0003] In the GNSS automatic deformation monitoring system, one or two stable points are usually selected as the reference point, but how to judge whether the reference point is stable or not, there is still no specific method

In the actual GNSS monitoring process, due to the influence of factors such as plate movement, solid tide, soil water and other mass loads, the station coordinates will have corresponding errors. For the judgment of the position change, the existing technology often adopts complex modeling methods to reduce the error, the calculation amount is large, and the error cannot be effectively eliminated

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