一种基于信道模拟的测速精度评估方法  

A Method for Evaluation of Range Rate Measurement Accuracy Based on Channel Simulator

作　　者：杨建国 韩一学 张建军 薛秀丽 杨先博 

机构地区：[1]北京遥测技术研究所,北京100076 [2]中国西安卫星测控中心,西安710043

出　　处：《飞行器测控学报》2015年第4期357-361,共5页Journal of Spacecraft TT&C Technology

摘　　要：为了评估单向多普勒测速动态测量精度,构建了一种基于卫星信道模拟器的测速精度评估系统,通过在卫星信道模拟器装订卫星飞行轨迹,利用卫星信道模拟器对上行信号加入传播时延、多普勒频率,对卫星在轨飞行状态下的单向多普勒测速进行场景仿真,并对场景仿真获取的测速数据进行O-C残差序列分析,得到动态测量条件下的测速精度。给出了O-C残差序列的计算方法,分析了单向多普勒测速体制下时钟偏差对测速结果的影响,并给出了一种简单的时钟误差修正方法。A range rate measurement accuracy evaluation system was constructed based on satellite channel simulator to evaluate the dynamic measurement accuracy of one-way Doppler range rate measurement.Scenario simulation was performed for one-way Doppler range rate measurement of an in-flight satellite by binding satellite flight trajectory in a satellite channel simulator and using satellite channel simulator to add propagation delay and Doppler frequency to the uplink signal.O-C residual sequence analysis was done on the range rate measurement data obtained from the scenario simulation to get range rate measurement accuracy under dynamic measurement conditions.O-C residual sequence calculation method is given and the impact of clock offset on range rate measurement results in one-way Doppler range rate measurement system was analyzed.A simplified clock error correction method is presented.

关 键 词：测速精度评估 卫星信道模拟器 O-C计算 时钟偏差 时钟误差修正 单向多普勒测速 

分 类 号：V557.5[航空宇航科学与技术—人机与环境工程]