星载GPS接收机的可见星预测方法  

The prediction method of visible satellites for spaceborne GPS receivers

作　　者：朱淑珍[1,2] 谢卓辰[1,2] 姜泉江[1,2] 尹增山[1,2] 

机构地区：[1]中国科学院上海微系统与信息技术研究所,上海200050 [2]上海微小卫星工程中心,上海201203

出　　处：《电子设计工程》2015年第16期1-4,共4页Electronic Design Engineering

基　　金：国家863计划(2011AA12A101)

摘　　要：GPS接收机在低轨卫星上有广泛的应用。事先预测可见GPS卫星有助于接收机快速捕获。地面接收机直接取仰角大于的GPS卫星为可见卫星,这一判决方法不适用于星载GPS接收机。根据GPS卫星天线覆盖范围,提出了一种对轨道高度分段讨论的基于仰角的可见卫星判决方法。通过MATLAB和STK仿真得到这一方法的平均预测正确率和召回率都大于93%。因此,这种方法适用于不同低轨轨道高度、不同航天任务的星载GPS接收机。Spaceborne GPS receiver is widely used in most low Earth orbit （LEO） satellites. Predicting the visible GPS satellites in advance can help improve the acquisition of GPS receivers. The ground GPS receivers judge the satellite whose elevation is greater than as visible, it is not suitable for spaceborne GPS receivers. According to the coverage of GPS antenna, this paper describes a visible satellites judgment method based on elevation by segmenting the orbit altitude. Due to the simulation based on MATLAB and STK, the results show that the mean rates of precision and recall of the prediction are both greater than 93%. Consequently, this method can be applied to onboard GPS receivers on different LEO altitudes for all kinds of space missions.

关 键 词：星载GPS接收机 可见星预测 GPS天线覆盖角 仰角 

分 类 号：TN965.5[电子电信—信号与信息处理]