英德
有道
百度
谷歌
图片
维基
百科
球心投影
gnomonic projection
- 球面上共焦点之椭圆、双曲线，在球心投影中仍投影成共焦椭圆、双曲线。
The cofocal ellipse and hyperbola of spherical surface will also be projected into the cofocal ellipse and hyperbola in gnomonic projection. - 针孔成像模型下非主光轴上的球体成像为椭圆，椭圆中心偏离球心投影点。
The image of sphericity which does not located the principal optic axis is an ellipse based on pinhole model, and the image center offsets from the projection of the sphere center. - 通过双星立体观测中卫星-球心-投影云-真云的平面和球面三角几何关系推导出真云云顶高度计算公式，利用云顶高度变化和图像匹配的方法，对模拟得到的双星“立体观测图像对”进行云顶高度反演实验。
A new and accurate method based on cloud movements, spherical and plane triangular relationships of earths, earth s core, projected-cloud and true-cloud for determining cloud-top height is developed.
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