GPS网络差分方法与实验

GPS连续运行站由于具有多种优势,所以在我国逐步建立,并开始得到广泛应用。但对于距离基准站较远,且位于基准站网一侧的情况下,该如何进行高精度的实时/快速卫星定位?本文给出了一种GPS网络差分方法,通过该方法可实现远海的高精度实时/快速GPS定位。最后,模拟远海应用情况进行实测试验,实验结果证明:在基准站距离200~300km的情况下,用户在距离基准站网400km一侧的范围内,采用双频机可实现优于2m的实时高精度定位,5min快速静态的水平精度优于1m,观测20min可到达优于0.5m的水平定位精度。

Method and experiments of GPS network difference

More and more GPS continues operation reference stations(CORS) have been founded and applied widely in China.But how to perform precise real-time or fast positioning in extreme area that is far away from base station network and locate one side of available base station network? In this paper,a method of GPS network difference was given.Several tests simulating high seas application were performed.The results of experiments prove that under the conditions of 200~300km between base stations,the precision of real-time positioning about 400km faraway is better than 2m;the horizontal precision of 5-min fast positioning is better than 1.0m;and the horizontal precision of 20-min fast positioning is better than 0.5m by dual-frequency receiver.