一种基于双台罗兰C信号测向交叉定位方法的研究

Study of passive bearing crossing locating based on two Loran-C signal

文中提出一种利用两个罗兰C导航台发射的信号实现测向交叉定位的方法,建立了测向交叉定位模型,采用平面近似方法,结合球面三角形定理,解算出舰船概位,再利用牛顿迭代法对概位进行修正,得到舰船真实位置。给出了定位解算公式,并以中国某海域罗兰C台链为参照,分析了算法的误差性能及工作区内的定位精度,验证了该方法的可行性。

A novel technique based on Loran-C signal crossing bearing locating was oilered. A position fixing model for only-bearing was established. A probable location was obtained by introducing plane approximate method and spherical triangle theorem, and the real location was gained when the probable location was modified by Newton＇s iterative technique. Orientation solution expression was educed. By reference to Loran-C launcher of the certain sea area in China, the locating precision and error performance of the algorithm in the specific area were analyzed. The results show that the technique is effective and feasible.