spherical trigonometry

基本解释

Shenton's critics, it should be pointed out, can fall back on spherical trigonometry and astronomical observations that date right back to Aristotle in 330BC.
有必要说明一下，早在公元前300年的亚里士多德时期，那时的球面三角学和天文观测结果就批驳了珊顿的地平论观点。
In the past, in geodesic surveying, a system of formulas derived from spherical trigonometry was used. This method is much complicated and the precision of the results is not sufficiently high.
过去在大地测距中使用一套由球面三角导出的公式、方法较繁而精度不够高。
Methods of spherical trigonometry and direction cosine matrix were applied respectively to derive the bracket error, and the two methods had the same error formula and the same calculation results.
应用球面三角法和方向余弦矩阵法分别推导出双轴陀螺平台的支架误差公式，发现由这两种方法推导出来的公式计算结果是一致的。

the branch of trigonometry concerned with the measurement of the angles and sides of spherical triangles