基于锚固站的UT1-UTC预报误差抑制技术  

Mitigation Technique of UT1-UTC Prediction Error Based on Anchor Ground Station

作　　者：孟繁智[1,2] 王成余[3] 刘文祥[1] 欧钢[1] 

机构地区：[1]国防科技大学电子科学与工程学院 [2]解放军95899部队 [3]扬州环境资源职业技术学院测绘工程教研室

出　　处：《电讯技术》2013年第4期444-449,共6页Telecommunication Engineering

摘　　要：针对导航星座自主定轨中的UT1-UTC预报误差,分析了其对星座定轨的影响,并对预报精度进行了仿真;给出了基于锚固站的定轨算法,并使用Walker12/3/1星座进行了仿真。结果表明:UT1-UTC预报误差对星座定轨精度影响较大,107 ms的预报误差将引入168m的星座位置误差;引入锚固站后,这一影响被有效抑制,抑制效果随锚固站测量精度的提高而增强。The UT1 - UTC prediction error is one of the error sources in the autonomous orbit determination of navigation constellation. Its influence is analyzed and its prediction accuracy is simulated. The algorithm of orbit determination is presented based on the anchor ground station. Simulations are executed with the Walkerl2/3/1 constellation. The results indicate the prediction error largely influences the constellation accuracy. The prediction error of 107 ms brings the constellation position error of 168 m. While using the anchor, this influence is effec- tively mitigated, and the mitigation effect is increased with the improved accuracy of the anchor＇s measurement.

关 键 词：导航星座 协调世界时 锚固站 自主定轨 预报误差 

分 类 号：TN967.1[电子电信—信号与信息处理]