基于天体观测的舰艇时间获取可行性分析  

Feasibility Analysis of Ship Time Acquisition Based on Celestial Observation

作　　者：张志友 李祎明 徐轩彬[1] ZHANG Zhi-you;LI Yi-ming;XU Xuan-bin(Dalian Naval Academy,Dalian 116018,China)

机构地区：[1]海军大连舰艇学院,辽宁大连116018

出　　处：《舰船电子对抗》2022年第3期43-47,共5页Shipboard Electronic Countermeasure

基　　金：海军大连舰艇学院科研发展基金项目,项目编号:DJYKYKT2020-007。

摘　　要：时间统一作为联合作战的奠基石,发挥着不可或缺的作用。然而当前舰艇时间获取方法存在易受电磁干扰、信号源头不同、保障制度不完善等问题,极易导致舰艇战时无法准确获取时间。提出了基于天体观测的舰艇时间获取方法,并对其可行性进行了分析,通过数学推导,获得时间变化与测者位置、天体高度间的数学模型,继而通过迭代法解算获得精确时间。基于该算法可论证已知任意天体的观测高度,结合已有的位置信息,便可根据数学模型获得世界时。该方法高效且不易受到外界干扰,即便对不同天体测定,时间溯源也唯一,可应用于海军绝大部分作战单元。随着工业化推进,天体观测准确性的提高,将更有助于该方法中时间的精确获取。As the cornerstone of joint operation,time unification plays an indispensable role.However,the current ship time acquisition methods are vulnerable to electromagnetic interference,different signal sources,imperfect support system and other problems,which easily lead to the inaccurately time obtain of ships in wartime.In this paper,the ship time acquisition method based on celestial body observation is proposed,and its feasibility is analyzed.The mathematical model among the time change,the observer position and the height of the celestial body is obtained through mathematical derivation,and then the accurate time is obtained through the iterative method.Based on this algorithm,the observation height of any known celestial body can be demonstrated.Combined with the existing position information,the universal time can be obtained according to the mathematical model.This method is efficient and not susceptible to external interference.Even for different celestial bodies,the time traceability is unique,which can be applied to most combat units of the navy.With the advancement of industrialization,the improvement of celestial observation accuracy will be more helpful to the accurate acquisition of the time in this method.

关 键 词：时间获取 天体观测 天文定位 天文导航 

分 类 号：P127[天文地球—天体测量]