无线电工程

由于传统基于速度和距离测量数据来对航天器测轨有其固有的局限性,针对探月以及未来深空探测多个关键测控弧段多目标高精度测定轨的需求,提出将同波束干涉测量技术(Same Beam Interferometry,SBI)应用于深空探测的方法。介绍了同波束干涉测量原理,给出了深空SBI测量系统建设的初步考虑,分析了系统中的多项关键技术并给出了解决方案。计算结果表明,在低信噪比观测条件下时延差测量精度能够达到1 ns。

The traditional spacecraft orbit measurement method based on velocity and distance determination has its limitation.In view of the requirement of of future lunar and deep space TT&C missions for multi-target high-precision orbit determination in multiple observation arcs,the Same Beam Interferometry( SBI) method is introduced into deep space TT&C mission.The principle of same beam interferometry is described,and the deep space SBI system construction is considered.The key techniques of system are analyzed and the solutions are given.The computation results show that the accuracy of time delay can be up to 1ns in the low SNR environment.