大地线

可能关心的，看来只是某些公式是用大地线及其方位角来推导的。

It seems only to be of possible interest in that some computation formulae are deduced in terms of the geodesic and its azimuth .

本文利用弗莱纳公式推导了大地线的曲率和挠率公式、大地线的参数方程、法截线的参数方程以及大地线和法截线的夹角。

The curvature and the torsion of geodesic , the parametric equation of geodesic and of normal section , and the angle between geodesic and normal section , are derived from the Frenet formulas in this paper .

拟大地线航法的球体半径

The Spherical Radius of the Approximate Geodetic Line Nautical Method

弦线法解算大地线问题的研究

The Research on the Question of Resolving Geodetic Line with Chord - line Method

新型大地坐标系中大地线的微分方程和微分式

Differential Equations and Differential Relationships of Geodesic Lines in New Form of Geodetic Coordinate System

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 .

该解式直接采用该点的测地坐标来求解子午线收敛角，从而能方便地将测地坐标系中任一大地线的方向角转换为大地方位角。

In order to transform conveniently the directional angle of a geodesic line into the geodetic azimuth , the solution of the meridianal convergence is expressed by geodesic coordinates of this point .

这就为建立以新大地坐标为坐标参数的大地线微分方程和微分关系式创造了前提，从而能在这种新型大地坐标系中进行便捷而又精确的椭球面上的计算。

Therefore , it lays the foundation for establishing the differential equation and differential relationship based on this type of coordinate parameters , and consequently it is convenient and accurate enough to operate on the ellipsoidal surface in this new form of geodetic coordinate system .

本文基于椭球面上大地线的微分方程，将法截弧方位角与大地线方位角之间的关系作为初始条件，通过用数值方法求解大地线的微分方程，进行大地主题的正反解。

Based on differential equation of geodesic on the surface of ellipsoid , the problem of direct and inverse solution of geodetic is solved through numerical method . The relationship of normal arc and geodesic is deduced and introduced as the initial condition for the differential equation .

±500kV葛上直流吉阳大跨越地线更换施工

Construction for Replacement of Ground Wire at Jiyang Large Crossing of ± 500 kV DC Ge & Shang Line