摘要
卫星星座方案的选择对导航定位精度具有很大影响。本文根据GALILEO系统的设计轨道参数模拟得到的GALILEO系统的卫星位置,分别计算了GPS系统、GALILEO系统和GPS/GALILEO组合系统在不同卫星截止高度角的情况下,全国范围内可见卫星和GDOP值的分布情况,并选择了北京、武汉和乌鲁木齐三个城市,连续观测24小时,分析了各城市的可见卫星和GDOP值随时间的变化规律。
The choice of satellite constellation would greatly affect the accuracy of navigation and positioning. The distribution of visible satellites and GDOP values for GPS, GALILEO and the GPS / GALILEO combination system was respectively calculated in different elevation masks, using the GALILEO orbit parameters for simulating the satellite position. Besides, continuous observations in 24 hours were conducted in Beijing, Wuhan and Urumchi to analysis the rule of the cities＇ visible satellites and GDOP value along with time changing.
出处
《测绘科学》
CSCD
北大核心
2008年第6期5-8,共4页
Science of Surveying and Mapping
