摘要
通过对星载原子钟钟差数据进行双差处理构建平稳时间序列,利用基于平稳时间序列的2χ检验法监测星钟异常扰动。通过分析得出,历元间双差检测法对于快变的相位异常比较敏感,而对慢变的频率异常效果不佳;而基于平稳时间序列的2χ检验法对快变的相位异常和慢变的频率异常均比较有效。
We presentd a x^2 method to detect the atomic clock anomaly of navigation satellites by making atomic clock bias twice difference and biulding the balanced time serial. Experiments show that double difference method is effective for the phase anomaly and not effective for frequency anomaly, and x^2 method based balanced time serial is effective for both phase anomaly and frequency anomaly.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2009年第5期585-588,共4页
Geomatics and Information Science of Wuhan University
基金
国家863计划资助项目(2007AA120601)
关键词
卫星导航
原子钟
钟差异常
完好性
satellite navigation
atomic clock
clock bias anomaly
integrity
