摘要
GPS应用于空间交会的相对导航具有广泛的应用前景,但两航天器相对运动时,航天器本身及地球曲率对GPS信号的遮挡是影响GPS相对导航可靠性的重要因素。研究了航天器单天线信号遮挡模型的双天线信号遮挡模型,通过数字仿真验证了数学模型的可行性,分析比较了两种数学模型在两航天器不同相对导航间距时GPS信号受遮挡情况,指出双天线相对导航系统相对于单天线相对导航系统性能的优越性。
There is rising foreground of application for space resection using GPS relative navigation. One of important factors of damaging reliability of GPS relative navigation is signal blockage by spacecraft and the earth. In this paper, two signal blockage models, single antenna signal blockage model and double antenna signal blockage model, are studied. Through mathematical simulation based two signal blockage models, the feasibility of two models is tested, and severities of signal blockage during different spaces between the target and the chaser are compared and analyzed. In the end, the superiority of double antenna relative navigation system over signal antenna relative navigation system in space resection is pointes out.
出处
《海洋测绘》
2007年第4期37-40,共4页
Hydrographic Surveying and Charting
关键词
空间交会
全球定位系统(GPS)
信号遮挡
建模
仿真
相对导航
双天线
space resection
global positioning system （ GPS ）
signal blockage
modeling
simulation
relative navigation
double antenna
