GPS/GLONASS/GALILEO组合导航DOP值及可用性分析  

Analysis of the DOP Values and Availability of Combined GPS/GLONASS/GALILEO Navigation System

作　　者：胡自全[1,2] 何秀凤[2] 刘志平[2,3] 桑文刚[2] 

机构地区：[1]陕西省核工业地质调查院,陕西西安710054 [2]河海大学卫星及空间信息应用研究所,江苏南京210098 [3]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《全球定位系统》2012年第5期32-37,共6页Gnss World of China

摘　　要：针对采用单卫星定位系统时,在城市高楼密集区和位于深山峡谷的水库、电站、矿山等环境下,GNSS用户接收到的卫星个数少且卫星分布不佳导致的可用性下降、定位精度较差的问题,提出多系统组合的定位方法。利用GPS、GLONASS及GALILEO系统的轨道参数模拟卫星星座,计算不同卫星高度角下单系统及组合系统的DOP值,根据DOP值分析其可用性。研究表明:在全球时空范围内、相同卫星高度角下,组合系统的可用性高于单系统,三系统组合的可用性高于双系统组合。Many surveying environments, like in urban canyons, deep openpit mines and valleys, limit the number of visible satellites, deteriorating the survey accuracy and therefore a single satellite positioning system hardly satisfies the requirements. To overcome these problems, a method using a GPS/ GLONASS/GALILEO integrated system was proposed. First, the satellites constellation was build based on the different orbit parameters of GPS, GLONASS and GALILEO systems. Secondly, the DOP values about single and integrated systems were calculated using the different elevation satellites. Finally, the DOP values from different combination scenarios were analyzed and its results shown that the accuracy, availa bility and reliability were improved compared with the single systems, and the three combi nation scenarios is superior to the tows.

关 键 词：GNSS 组合系统 DOP值 可用性 

分 类 号：P228.4[天文地球—大地测量学与测量工程]