Analysis of network RTK precision of grid high precision satellite navigation and positioning service method

This paper introduced the grid high precision satellite navigation and positioning service method, which improved the virtual reference station (VRS) method. And analyzed the impact of different virtual grid resolutions to the network real time kinematic (RTK) precision. The performance test was then proceed using the normal grid resolution in the knimatic application to analyze the knimatic network RTK precision. Result shows that the network real time kinematic RTK precision will degrad as the distance increases. The precision of the 2′×2′ and 4′×4′ virtual grid resolutions is nearly the same and both wthin centimeter level, which means that 4′×4′ virtual grid resolution can be as a regular selection, so as to meet the requirements of calculation and positioning accuracy of centimeter level for relatively ficed virtual grid point. In addition, results under the condition of regular grid resolution show that the extent of the horizontal direction residual sequence of the knimatic application is the centimeter level, and the height direction residual sequence is the decimeter level. So that the regular grid resolution can fulfil the requirements of the vehicle dynamic applications.