大圆改正量特性及应用

Study on great circle correction and its application

利用计算机计算快速和方便的作图功能，给出了不同纬区两点在不同方向和距离时，实际大圆改正量及近似公式计算值误差曲线；系统地分析了大圆改正量及近似公式误差随纬区和两点间距离与相对方向的改变而变化的特点；

The actual great circle correction and the error of the great circle correction determined by the approximate formula relating to different Rhumb bearing and distance between two points at different latitude areas are illustrated in this paper, whose characteristics are analysed. The application of the great circle correction by the approximate formula in different circumstances is also given.