The research of precise point positioning

This paper introduces the positioning principle of precise point positioning in detail, Analysis of the three kinds of precise point positioning models which are most widely used, and compared in detail; Classification analyzed all kinds of precise point positioning error sources, And the ways to eliminate the error; When introduces the precise point positioning data processing method, precision satellite ephemeris and precision clock difference respectively from acquisition, data preprocessing, and the parameter estimation of precise point positioning (PPP) was introduced in detail. In this paper, on the basis of ade1 tracking station observation data, by means of three observations of precise point positioning (PPP) model of troposphere delay correction model, as well as the precise ephemeris and clock difference file the calculating precision of the interpolation method of comparison, to discuss a form of the optimal combination of precise point positioning accuracy is used to improve the static mode. The results show that the tracking station point in three directions in X, Y, and Z and time variables exist obvious linear relationship; it has good reliability on the grey model to predict the point of space. © 2014 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved.