脉冲星TOA测量误差及几何精度分析  

Analysis of Pulsar Time-of-Arrival Measurement Error and Dilution of Precision

作　　者：毛悦[1,2] 宋小勇[2] 柴飞[3] 

机构地区：[1]信息工程大学测绘学院,河南郑州450052 [2]西安测绘研究所,陕西西安710054 [3]西安卫星测控中心,陕西西安710038

出　　处：《测绘科学技术学报》2009年第2期140-143,共4页Journal of Geomatics Science and Technology

摘　　要：利用信躁比估算法对脉冲星数据库中适宜导航的脉冲星进行了脉冲到达时间测量误差计算。分析了测量误差随观测时间及探测器面积的变化情况。在此基础上,指出了在DOP值分析中脉冲星导航与GPS的不同点;按照脉冲到达时间TOA测量误差较小原则给出了10组脉冲星优选组合。分析了DOP值随观测时间及观测脉冲星数的变化情况。Pulsars＇ time of arrival measurement error were calculated using SNR method. The calculated pulsar which suitable for navigation was selected from pulsar database. The influence of observation time and detector area on measurement error were analyzed. Based on this, the differences of DOP analysis between GPS and pulsar navigation were given. The top ten group of pulsar were presented based on lower measurement error principle. The influence of observation time and detector area on DOP were also analyzed.

关 键 词：脉冲星 脉冲到达时间(TOA) 导航定位 精度因子(DOP) 

分 类 号：P228[天文地球—大地测量学与测量工程]