A method to establish GPS grid ionospheric correction model

Details A method to establish GPS grid ionospheric correction model A method to establish GPS grid ionospheric correction model

2010-10-10

arxiv.org/abs/1010.1914v2

Physics

Space Physics

Proceeding of Pan Ocean Remote Sensing Conference (PORSEC), Nov. 29-Dec. 3, 2004, Concepcion, Chile

Scientific paper

The ionospheric influence is one of the largest error sources in GPS positioning and navigation after closing the Selective Availability (SA). Therefore, it is available to establish a real time ionospheric correction model to eliminate or mitigate the ionospheric influence. In this paper, a new method, Hardy Function Interpolation method, is presented to establish a high precision grid ionospheric model (GIM) over the Yangtze River Delta using continuous GPS data of SIGAN network, and the internal and external accuracy of TEC from the GIM are evaluated. It has shown that the real time and high precision GIM over the Yangtze River delta is well established using the Hardy Function Interpolation. The internal and external accuracy of TEC from the GIM are all smaller than 0.3m and better than the methods of distance weight function of WAAS and spherical harmonic function. In addition, these methods are further used to initially investigate and analyze the seasonal variations of TEC over Yangtze River delta.

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