| 摘要: |
| 基于卫星通信信号的多站时差测轨是一种重要的新型无源测轨方法，分析其定轨精度对系统
应用具有重要意义。介绍了四站时
差测轨原理与系统组成，提出了基于四站时差测量数据的自校准统计定轨策略，采用计算机
仿真了同步轨道卫星的统计定轨精度。仿真结果表明：当无系统误差时，24
h观测数据统计定轨位置误差约为11 m，预报1周位置误差约100 m；当存在系统
误差时，可用自校准方法同步估计系统误差，系统误差估计精度约为4 m，位置误差约
为120 m，预报1周的位置误差约为200 m。 |
| 关键词: 同步卫星 四站时差 无源测轨 统计定轨 定轨精度 |
| DOI： |
|
| 基金项目: |
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| Passive orbit measurement of geosynchronous satellite based on four-station′s time difference of arrival |
| PENG Hua-feng,ZHENG Chao,ZHANG Tao |
| () |
| Abstract: |
| Measuring time difference of arrival(TDOA) based on satellite′s commu
nication signal is one of the best and new passive orbit measurement methods.
It is meaningful to analyse its orbit determination accuracy. In this paper,the
principles an
d system composition of passive orbit measurement with four-station′s TDOA are
i
ntroduced. A self-calibration algorithm of accurate orbit determination for the
system is proposed. Orbit determination accuracy of the system is simulated by c
omputer, and the result reveals that:when there exists no system error, the
position accuracy is 11 meters with 24 hours observation data, the position a
ccuracy is 100 meters after 1 week′s prediction;when there exists system error
, the position accuracy is 120 meters with 24 hours observation data, the positi
o
n accuracy is 200 meters after 1 week′s prediction, and the estimated system er
ror accuracy is 4 meters. |
| Key words: geo-synchronous satellite four-station′s time difference of arrival passiv
e orbit measurement statistical orbit determination orbit measurement accurac
y |
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