point sphere

A point on the celestial sphere directly below the observer, diametrically opposite the zenith.

天底天球上,在观测者垂直向下的一点, 与天顶完全相对.

Convex modulus depicted overall degree of convexity of the unit sphere of spaces. It was very different for degree of convexity of each point that it would produce very great influence on the whole feature of the spaces.

凸性模刻划了空间单位球面的总体凸性程度，但是每一点的凸性程度都有很大的不同，这将会对空间的整体性质产生很大影响。

Astronomy A point on the celestial sphere directly below the observer diametrically opposite the zenith.

天球上,在观测者垂直向下的一点,与天顶完全相对.

Research on the nature of the conjugate image of the point on the major axis at a distance from the center of a large-aperture sphere mirror

大孔径球面镜轴外点的共轭象性质研究环状复球面镜谐振腔的衍射积分方程

Algorithm for Finding Registration Sphere Center in Merging Multiple-View 3D Point Clouds

多视点三维数据合并中的定标球球心算法