Method for rapidly measuring precision coordinate and elevation of ground point in area with weak CORS signals or without CORS signals

Abstract

The invention discloses a method for rapidly measuring the precision coordinate and the elevation of a ground point in an area with weak CORS signals or without CORS signals and belongs to the field of geodetic surveying. In the area with weak CORS signals or without CORS signals, the effectiveness, the stability, and the precision of CORS technology cannot satisfy the requirement of actual production. Accordingly, the invention provides the method for rapidly measuring the precision coordinate and the elevation of a ground point in an area with weak CORS signals or without CORS signals. The method comprises: acquiring the coordinate, in an ITRF framework, of a ground point at an average observation epoch moment by means of a method combining static measurement with dynamic measurement; acquiring a precise national CGCS2000 coordinate by using datum transformation; acquiring a full-frequency-domain quasigeoid model with a certain resolution by using data of earth gravitational field models with different precisions and resolutions, digital terrain models, and a certain amount of optimized GNSS / benchmark so as to achieve elevation transformation and the normal height of the ground point. The method has characteristics of fast speed, high precision, and good stability, and has a high application value.

Description

technical field [0001] The invention relates to a method for realizing rapid measurement of precise coordinates and elevation of ground points in areas with weak or no CORS signals, and belongs to the field of geodetic surveying. Background technique [0002] Global Navigation Satellite System (GNSS), as a revolutionary development of surveying and mapping technology in the new century, has brought about earth-shaking changes in surveying and mapping technology. According to different data processing methods, GNSS measurement is divided into static measurement and dynamic measurement. Static measurement has high precision, but it has disadvantages such as long data processing time, time-consuming, and high cost. Therefore, static measurement is often used for high-precision control measurement at various levels. There are two main methods for dynamic measurement: 1. The method of setting the base station, that is, the carrier phase of the base station and the rover station ...

AI Technical Summary

Problems solved by technology

The direct measurement coordinates of these two methods are WGS-84 coordinates, and the elevation is the geodetic height, which cannot be directly used for engineering surveys. Both coordinates and elevation conversions are required. In weak or no CORS signal areas, the accuracy and stability of CORS measurement All can not meet the needs of actual production, in view of this situation, the present invention utilizes conventional GNSS-RTK technology, static precision point positioning technology, CGCS2000 coordinate conversion technology, multi-source gravity field data to determine the region-like geoid technology to realize weak or no Fast measurement of coordinates and elevation of ground points in CORS signal area

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