大圆航线

多岛海域是大圆航线上极具危险的运输中枢，也是连接北太平洋各端港口的最短通道。

The archipelago is a hazardous traffic median in the great circle route , the shortest path between ports on either side of the North Pacific .

用辛普森自适应算法进行了仿真计算，并与大圆航线的计算结果进行了比较。

A simulation calculation was made by the Simpson numerical integral , and the simulated results of the initial course and route distance were compared with those based on the great circle route .

对激光捷联惯导优化算法及大圆航线航迹规划进行了全数字仿真。

Optimized algorithms of LSINS and GCFP trajectories are confirmed by entire digital simulations .

本文还使用VC++编制了程序，对具体实例进行了优选航线与大圆航线的模拟实现，通过对计算结果的比较，验证了方法的可行性。

The program is written in VC + + . A case is calculated and the applicability of methods is proved .

在导航参数计算方法上，采用法截弧解大地线长方法代替传统大圆航线计算方法来提高参数计算精度。

To get more accurate navigation parameter , the method of normal intercept arc is used to calculate earth-line-length instead of the traditional big circular navigation method .

详细推导并提出了扩展导航参数及大圆航线航迹解算算法，还给出了算法流程图。

Extended navigation parameters ( ENP ) and great circle flight path ( GCFP ) calculated algorithms are presented in detail and the algorithm flow chart is presented .

船舶在进行远洋航行时一般会选用大圆航线，但有时在中纬度海区进行远洋航行时，恒向线不失为中纬度海区远洋航行中的一种选择。

Ships always select circle navigation line during the oceangoing voyage , however , sometimes on the oceangoing voyage in the mid-latitudes ocean districts , crosswise navigation line is alse the choice .

随着区域导航和所需导航性能的实施，平行航路、随机航路和起点和终点之间的大圆航线直飞得以实现，提高了空域利用率和飞行安全。

With the application of area navigation and Required Navigation Performance ( RNP ), this would make the parallel route , random route and direct flight route possible , and also improves the efficiency of air space and the flight safety .

讨论了设计方案和原理，分析了制导控制指令生成方法以及制导指令参数的算法，并与大圆航线跟踪+姿态驾驶仪的方案进行了比较。

Design scheme and principle were discussed . The generating methods of the guidance and control instructions and the algorithm of calculating the parameters of guidance instructions were analyzed . The scheme was compared with the big circle route flight mode adding the attitude autopilot .