Method for automatically acquiring critical data from rail satellite positioning data

Abstract

The invention provides a method for automatically obtaining key data from positioning data of an orbit satellite, and a small number of key data points are selected from a plurality of orbit satellite positioning data and are connected sequentially to form a broken line to describe the orbit, and a combined mathematical model solving key data is built simultaneously, and a concrete calculation method is proposed that: a point which has the longest projection distance in a line segment connected by a starting point and a terminal point is found in a data set from the positioning data of the satellite, if the projection distance is shorter than the specification error, the data set need not be split, or else the point is a split point and divides the data set into two data sets front and back, the respective key points of the new datasets are found in the same way; and the finding of key points continues until all the datasets can not be split, so all the key points are obtained. The invention can automatically and quickly obtain a small number of key data from a plurality of orbit satellite positioning data and effectively save the storage space and improve the real-time location of trains.

Description

A Method of Automatically Obtaining Key Data from Orbiting Satellite Positioning Data technical field The invention is a method for automatically acquiring key data from orbital satellite positioning data. Utilizing the invention can save effective storage space and improve real-time performance of train positioning. The invention belongs to the field of train control based on satellite positioning in the technical field. Background technique Satellite positioning is a high-end science and technology. At present, only a few countries in the world have and are developing satellite positioning systems, including the global satellite navigation system "GPS (Global Positioning System)" of the United States, the global satellite navigation system "GLONASS (Global Navigation Satellite System)" of Russia, and the global satellite navigation system of Europe. system "Galileo" and China's global satellite navigation system "Beidou system". Among them, the former two have develop...

AI Technical Summary

Problems solved by technology

At present, the methods often used in digital orbit maps usually have certain limitations, for example, it will lead to an increase in data storage, especially the corresponding map matching method is complicated

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