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.
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.
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