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    Microcomputer-aided Calculation of Mercartor's Sailing and Great Circle Track
    墨卡托航行和大圆航线的微机计算法
    The program is written in VC++ . A case is calculated and the applicability of methods is proved.
    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。
    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.
    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。
    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.
    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。
    3. Extended navigation parameters (ENP) and great circle flight path (GCFP) calculated algorithms are presented in detail and the algorithm flow chart is presented.
    3、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。
    4. Optimized algorithms of LSINS and GCFP trajectories are confirmed by entire digital simulations.
    4、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。
    2. Algorithms of ENP and GCFP are presented.
    2、提出了扩展导航参数及大圆航线航迹解算算法。
    3. Entire digital simulatons of optimized algorithms of LSINS and GCFP trajectories are done by computer programming.
    3、编程实现激光捷联惯导优化算法及大圆航线航迹规划全数字仿真。
    Using the mathematical and the programs presented in this paper, quick calculation can be made, on a micro-computer, PC-1500, of Mer-cartor's sailing (Dead reckoning can be done continuously and the true course and speed can oe found with the preset drifting) and of the Great Circle and the Compositive Tracks, with their accuracy up to the navigation requirements.
    根据本文数学模型、程序,借助PC—1500微型计算机可以快速计算墨卡托航行(可连续求得推算船位,能求得预配流压差情况下的真航向和航速)、大圆航线和混合航线的问题。 其计算精度较高,足以满足航海上的要求。
    This article gives a brief introduction to the Great Circle and Coustant Course Program and its application, the practical value of which by programable calculation to navigation is also approa-chod.
    介绍恒向线和大圆航线程序及应用,探索高级程序计算器在航海驾驶业务上的实用价值。
    he analytical method for determining great circle initial course has been restudied, and with the development of its application it is found that the related formula and concepts contained in the prevailing textbook should be corrected and completed. 
    针对地文航海教材中在利用公式法求大圆航线始航向时所存在的问题进行了系统的分析和研究.重点叙述了正弦公式中利用经差的比较来确定航向名称的问题.特别强调了在利用公式法求大圆航线始航向应该注意的问题,进而纠正了一些教材中存在的错误概念,弥补了其中的不足.
    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.
    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。
    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.
    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.
    The research shows that if the distance of a nearly east-west route is less than 1 000 km,the FANS route is approximately 0.35% longer than the great circle route,but if the distance of a nearly south-north route is less than 1 000 km,the FANS route is about 0.24% shorter than the great circle route.
    结果表明,当航程小于1 000 km时,对于近EW走向的航线,FANS航线比大圆航线长约0.35%; 而对于近SN走向的航线,FANS航线比大圆航线短约0.24%.
    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.
    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.
 

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