最小二乘法在探月工程星地测控链路分析中应用

Analyzing and Modeling of the Lunar Exploration Spacecraft to the Earth Station of Satellite TT&C Subsystem Using Least Squares

针对星地测控链路分析是探月工程中对嫦娥卫星进行有效测控的前提,将最小二乘法引入星地链路分析中,提出了一种新的目标跟踪分析方法。在雷达方程理论模型的基础上,根据地面站测控系统的性能要求,对星地链路中信号传输特性进行了仿真分析研究。建立了目标信号电平和AGC电压估算模型。仿真和试验结果表明:目标信号电平和AGC电压的估算数据与实测值基本吻合,该方法在目标跟踪分析应用中是有效的和可靠的。

Basing on the Lunar Exploration Spacecraft requiring the support of earth-based TTC system,a new approach is proposed to analyze and model of the spacecraft to the earth-based TTC systems using least squares.After analyzing carrier wave transmitted between the satellite,the earth station,and it＇s gain brought by transmit antenna and receive antenna,and various losses brought by space environment.models of Signal-to-Noise and AGC voltage are established and simulated.Through simulation and experimentation,it satisfies the requirement of TTC and the method is effective and reliable.