卫星高度角变化对大气折射的影响  

The Influence of Satellite Elevation Angle Changing on Atmospheric Refraction

作　　者：佘娣[1] 谢劭峰[1] 彭家頔[1] 

机构地区：[1]桂林理工大学土木与建筑工程学院,广西桂林541004

出　　处：《全球定位系统》2011年第2期25-28,共4页Gnss World of China

基　　金：国家自然科学基金项目(41064001)

摘　　要：GPS定位的速度和精度与卫星高度角的选择密切相关。对对流层和电离层折射的误差模型进行了推导,计算了不同卫星高度角下大气折射偏差,分析了其变化趋势及定位时对水平误差的影响。对对流层折射改正和电离层折射改正的几种经典方法的优点及局限性进行了分析,总结了如何选择合适的卫星高度角并结合经典大气折射改正方法来提高GPS定位的速度和精度。The speed and accuracy of GPS position is closely related with the choice of satellite elevation angle. In this article, a model of error to the troposphere and ionosphere refraction is closely derivated, the deviation of atmospheric refraction in different satellite el- evation angle is computed companioning with the influence to the standard error of location. We analyze the refraction correct methods and limitations by the ionosphere and troposphere and above all, make conclusion on how to choose the right combination of classics correct way of atmospheric refraction and satellite high angular to improve the speed and accuracy of GPS location.

关 键 词：卫星高度角 伪距 对流层 电离层 

分 类 号：P228.4[天文地球—大地测量学与测量工程]