GPS/BDS空间可见性与GDOP分析  

Space Visibility and GDOP Analysis of GPS / BDS

作　　者：向才炳[1] 边少锋[1] 吴泽民[1] 

机构地区：[1]海军工程大学导航工程系,湖北武汉430033

出　　处：《海洋测绘》2013年第6期33-35,共3页Hydrographic Surveying and Charting

基　　金：973项目(2012CB719902);国家自然科学基金项目(41274013;41374082)

摘　　要：先给出了卫星可见性模型,然后给出了GPS/BDS组合几何精度因子(GDOP)计算公式,通过近期一组实测的GPS与BDS星历计算了全球范围内不同观测高度处的组合星座卫星可见性与GDOP值,揭示了卫星可见性与GDOP值随空间观测高度变化的规律。Visibility and GDOP are important parameters which can evaluate performances of satellite navigation systems. The satellites＇ visibility model is given at first, and then the GDOP calculation formula of the GPS/ BDS integrated system is given. By using a set of recent ephemeris of GPS and BDS, the satellite visibility and GDOP of different observing heights in a global scope are calculated, which reveal the law of the variations of satellite visibility and GDOP with height.

关 键 词：全球定位系统 北斗卫星导航系统 可见性 几何精度因子 

分 类 号：P228[天文地球—大地测量学与测量工程]