Regional Modeling of Atmosphere Delay in Network RTK Based on Multiple Reference Station and Precision Analysis

摘要

Aiming to the disadvantages of traditional triangle network solution at present, this paper proposed a regional modeling method of atmosphere delay in network RTK based on utilizing redundant observation information of multiple reference station in regional GNSS network. The algorithm of ionosphere and troposphere delay corrections in network RTK is studied respectively. At last, the precisions of traditional triangulation linear interpolation model and regional model proposed by this paper are analyzed using measured data from American CORS. The results show that the precision of ionosphere delay correction interpolation model based on multiple reference station adopted by this paper is similar to that of traditional triangulation linear interpolation model. The precision of troposphere delay correction interpolation model concerning with elevation based on multiple reference station adopted by this paper is superior to the traditional triangulation linear interpolation model and is more stable. Especially for the satellites with low-elevation angles, its precision of interpolation model are much higher than those of traditional triangulation linear interpolation model.