Parameter-free real-time locating method based on CORS

Abstract

The invention discloses a parameter-free real-time locating method based on a CORS. The method includes the steps that summary coordinate information is sent to a control center server of the CORS and a user moving station by a user; on the basis of coordinates of a reference station, original observed values and the like, the server generates difference correcting data for the user and sends the data to the user and the user moving station; according to the summary coordinate information and the difference correcting data, the difference correcting data are converted by the user moving station through conversion parameters corresponding to the position of the user, so that converted difference correcting data are obtained and sent to the user; after receiving the converted difference correcting data, the user completes real-time locating resolution through the combination with the observed data obtained by the user, and according to corresponding projection setting, plane and elevation achievements based on a local coordinate standard are obtained.

Description

technical field [0001] The invention relates to the field of surveying and mapping science and technology, in particular to the real-time application of a GNSS continuously operating satellite positioning service system (Constinously Operating Reference Stations). Background technique [0002] With the integrated application of computer technology, communication technology, GNSS positioning technology, etc., the network RTK technology based on the continuous operation satellite reference station network can realize high-precision and high-reliability real-time positioning under long-distance conditions, so it has been widely promoted in my country use. Because the CORS positioning result is the geocentric coordinate system, and the coordinate system used in my country's history is the paracentric coordinate system, such as the Beijing coordinate system in 1954 and the Xi'an coordinate system in 1980, although the 2000 national geodetic coordinate system (CGCS2000) that is bei...

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Problems solved by technology

Because the CORS positioning result is the geocentric coordinate system, and the coordinate system used in my country's history is the paracentric coordinate system, such as the Beijing coordinate system in 1954 and the Xi'an coordinate system in 1980, although the 2000 national geodetic coordinate system (CGCS2000) that is being used is also geocentric coordinate system, but it is also different from the most widely used GPS positioning results (based on the WGS-84 coordinate system). In addition, the 1985 National Elevation Datum (or the 1956 Yellow Sea Elevation System) currently used in my country is even more in line with the geodetic height of GNSS positioning. There are obvious differences, so usually the result of CORS system positioning cannot be directly applied, and usually needs to be converted and processed by establishing a specific mathematical model with parameters before it can be applied

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