锚泊状态下船载测控系统对塔相位标校研究

Study on tower phase calibration for ship-borne TT&C system at anchor

摘要:

航天器海上测量船是搭载着船载测控系统的海上平台,主要完成对目标的海上测控任务。测量船在新建之时或大修之后均要对搭载的测控系统进行标校,主要是进行海上合作目标校飞。海上校飞过程中锚泊状态下天线对塔相位标校必不可少,对此进行研究有助于提高锚泊状态下对塔相位标校过程的认识,提升船载测控系统的标校精度。研究过程首先分析了我国测量船所采用的差模双通道单脉冲雷达的跟踪原理和天线对塔校相原理,然后再结合锚泊状态下大型海上测量船的运动规律,建立了船体运动对锚泊状态下对塔校相精度影响的数学模型,最后在远场条件下对数学模型进行了的仿真,分析了测量船锚泊时不同运动模式对相位标校的影响,并进一步给出了锚泊状态下船载测控天线对塔校相的建议。

Abstract:

An instrumentation ship of spacecraft is an offshore platform with ship-borne TT C system. Its role is to marine measurement and control mission. When the instrumentation ship is built or overhauled, the ship-borne TT C system shall be calibrated. The tower phase calibration for ship-borne TT C system at anchor is essential. This study will help to improve the understanding of the calibration process of tower phase calibration under mooring conditions and improve the calibration accuracy of ship-borne TT C system. Based on the differential mode tracking principle and phase calibrating principle of dual-channel monopulse radar, the relationship between phase calibration error and ship movement was analysed and simulated under the condition of far field. According to the simulation conclusion, some proposals about phase calibration of ship-borne TT C system at anchor are offered in this paper.