天文学进展2023，Vol.41Issue(4)：569-580,12.DOI:10.3969/j.issn.1000-8349.2023.04.08
用于VLBI测轨的PN-DOR信标研究
Rearch on PN-DOR Beacon Used in the VLBI Orbit
摘要
Abstract
Phase fluctuation error is one of the important errors of VLBI orbit system in the lunar exploration and deep space exploration.It is caused by the different spectrum structure of DOR and radio source signal,which leads to the inconsistency of phase fluctuation of receiving equipment.The novel PN-DOR beacon realizes the spectrum structure similar to the radio signal through the spread spectrum modulation of the existing DOR beacon by the pseudo random sequence,which can effectively reduce the phase fluctuation error.This paper studies the calculation methods of phase error and bandwidth synthesis group delay error of PN-DOR beacon in VLBI orbit measurement.On this basis,by comparing the total delay error of PN-DOR and DOR beacon under the same transmission power,the applicable condition of PN-DOR is analyzed.关键词
VLBI/PN-DOR信标/相位误差/群时延误差Key words
VLBI/PN-DOR beacon/phase error/group delay error分类
天文与地球科学引用本文复制引用
陈奥,童力,王瑞,郑为民..用于VLBI测轨的PN-DOR信标研究[J].天文学进展,2023,41(4):569-580,12.基金项目
国家自然科学基金(11973011) （11973011）
国家基础科学数据共享服务平台(DKA2017-12-02-09) （DKA2017-12-02-09）
中科院关键技术人才 （）
上海市领军人才 （）
上海天文台重点培育项目 （）
