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采用天线组阵辅助的连线干涉测量载波相位解模糊
赵强,侯孝民,高亢,焦义文
0
(航天工程大学 光电装备系,北京101416)
摘要:
针对航天器初始轨道精度无法满足连线干涉测量(CEI)载波相位解模糊需求的问题,提出了一种采用短基线天线阵辅助的解模糊方法。从理论上分析了载波相位模糊产生的原因以及不同方向角、不同基线长度条件下解模糊对轨道预报精度的最低要求,对具有代表性的1 km短基线天线阵在主站测距加两基线方向角(Rlm)体制下的定位精度进行了仿真,结果表明,方向角越大,该方法的无模糊基线长度扩展能力越强。最后给出了达到最优测角精度的基线长度设置和解模糊流程。
关键词:  连线干涉测量  天线组阵  短基线  相位模糊  Rlm体制
DOI:
基金项目:
Connected elements interferometry carrier phase ambiguity resolution aided by antenna arraying system
ZHAO Qiang,HOU Xiaomin,GAO Kang,JIAO Yiwen
(Department of Optical and Electronic Equipment,Aerospace Engineering University,Beijing 101416,China)
Abstract:
Aiming at the problem that the initial orbit precision of the spacecraft can not meet the demand of carrier phase ambiguity resolution in Connected Elements Interferometry(CEI) system,a method of ambiguity resolution aided by short baseline antenna array is proposed.The reason for the carrier phase ambiguity and the minimum requirement for the accuracy of orbit prediction under the conditions of different direction angles and different baseline lengths are analyzed theoretically.Positioning precision of 1 km short baseline antenna array under Range and two angles(Rlm) system is simulated and the results show that the greater the direction angle is,the better the ability of this method to extend the length of the unambiguous baseline.Finally,the baseline length setting and the procedure of ambiguity resolution to achieve the optimal angle measurement accuracy are given.
Key words:  connected element interferometry  antenna arraying  short baseline  phase ambiguity  Rlm system
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