GPS定位技术在航天器高动态导航中的应用问题研究  

Research on GPS Application in Space Craft＇s High Dynamic Navigation

作　　者：解晶 朱启仁 

机构地区：[1]解放军92941部队,辽宁葫芦岛125000

出　　处：《现代导航》2011年第1期11-15,共5页Modern Navigation

摘　　要：本文着重讲述了GPS系统在航天器动态导航中的应用问题，分析了航天器高动态环境下对GPS信号的捕获和跟踪所带来的影响。提出了FFT码快速捕获算法，以及二阶FLL与三阶PLL混合载波跟踪方案，并对码环和载波环的结构和参数的设计方法进行了说明。仿真结果和分析表明该方案能在航天器高动态环境下实现信号的快速捕获，且能较好地满足接收机动态性能和跟踪精度的要求。GPS application in spacecraft＇s high dynamic navigation is presented in the paper, the impact on GPS signal acquired and tracked by spacecrafts under high dynamic circumstances is analyzed. FFT fast acquisition algorithm and FLL and PLL mixing carrier waves tracking plan are presented, and the designs of code and carrier wave rings＇ structures and parameters are introduced. Simulation and analysis results show that signals can be fast acquired by spacecrafts under the high dynamic circumstances and meet the dynamic performance and tracking accuracy of receivers.

关 键 词：GPS FFT快速捕获 航天器 高动态 载波跟踪技术 

分 类 号：V448[航空宇航科学与技术—飞行器设计]