2012•Gnss World of ChinaRequires access

GPS/GLONASS Point Positioning and its Accuracy Analysis

Wang Xie-xian

Abstract

A mathematical model based on the broadcast ephemeris of GPS / GLONASS single-point positioning of the integrated navigation is described,and the technical difficulties of the combination of navigation is analyzed.The combination of navigation and positioning is based on GPS pseudo-range point positioning,and GLONASS satellite coordinates is obtained by fourth-order Runge-Kutta numerical integration methods,and a new kind of method which do not need to track intended together the programming approach to computing is used.To the IGS tracking stations to provide the data of observation,GPS,GLONASS and GPS/GLONASS combination of three kinds of ways are respectively applied to pseudo-range point positioning,and different weights to select the right combination of positioning accuracy has been done a comparative analysis.

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Key concepts: GLONASS, Global Positioning System, Precise Point Positioning, Ephemeris, Computer science, Geodesy, Real Time Kinematic, Point (geometry)