摘要
GPS定位精度主要取决于等效距离误差和空间几何构型2个方面,空间几何构型对特定区域定位精度的影响,可利用STK的覆盖品质分析模块计算其几何精度系数（geometric dilution of precision,GDOP）值进行分析。为寻求对区域定位精度影响最大的星座构型和避免大规模仿真计算,采用收缩搜索范围的方法,根据不同规则设计5种分析方案,分析不同GPS星座构型失效下对区域GDOP值的影响。结果表明：区域覆盖时间长和访问次数多的卫星构型,对区域定位精度影响最大。
GPS precision of positioning mainly bases on equivalent distance error and space distribution of the GPS satellites. To analyze the influence of space geometric configuration to the precision of positioning of particular area, STK/figure of merit module can be used to calculate geometric dilution of precision （GDOP）. In order to search the most influencing configuration and avoid mass simulation and calculation, the paper adopts the method of contract search range to design five schemes by different regulations. Analyzing the influence of different GPS configuration to GDOP of area, the result indicates that the most influencing configuration has the most coverage period and most pass time.
出处
《装备指挥技术学院学报》
2009年第6期47-50,共4页
Journal of the Academy of Equipment Command & Technology
关键词
几何精度系数
仿真
构型
geometric dilution of precision（GDOP）
simulation
configuration
