晷影,shadow cast by the sun on the dial
gnomonic projection日晷投影
3)measurement of gnomon shadows晷影测量
4)the Guiying Tang (Gnomon Shadow Hall)晷影堂
5)solar shadows in Jiu Fu九服晷影
1.The algorithms for calculating solar shadows in Jiu Fu were different from the others in the calendars from the Tang Dynasty to the Yuan Dynasty.九服晷影算法从一行《大衍历》（公元７２４年）起，成为唐宋金元历法计算的组成部分。
6)ellipsoidal gnomonic projection椭球面日晷投影
1.The three important characteristics and application of the ellipsoidal gnomonic projection are described.研究了从地球椭球面描写到海图平面的采用双重投影法的日晷投影方程式 ,并阐明了椭球面日晷投影的 3个重要特性及其应
延伸阅读

晷影1.见"晷景"。