宋菲菲,张喆,杨乐,赵俊鹏

• 1:天津大学海洋科学与技术学院

摘要(Abstract)：

针对船舶天文定位需要同时观测天体和水天线来获取天体高度角,其定位的结果和精度常受制于水天线的可观测时段问题,该文提出了一种无需水天线观测的船舶天文定位新方法。该方法将双天体的方位角作为观测量,通过牛顿迭代法直接计算船位,不受水天线有限观测时段的限制,并且可避免画天文位置线的繁琐作业。基于天体高度方位表数据对该方法模型进行验证分析得:天体方位角测量精度越高,该方法的船舶定位误差越小,当天体方位角测量精度在±0.05°时,船舶定位误差在5nmile之内,该方法可用于夜间船舶定位,从而扩大传统天文定位使用时段。

关键词(KeyWords)： 天文定位;水天线;天体高度角;天体方位角

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41702307)

作者(Author): 宋菲菲,张喆,杨乐,赵俊鹏

DOI: 10.16251/j.cnki.1009-2307.2019.08.013

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