Solutions and Problems of Dynamic Ranging of C-SPAD in SLR

A series of methods,such as the mechanical shutter,the divergent angle alignment,the distance gate,the spectral filter,the space filter applied to the SLR at 1.2m Alt-Az telescope of Yunnan Observatory, are introduced in this paper. Problems of dynamic ranging of C-SPAD were solved. SLR was realized to LEO and high-orbit satellites during the night time and to some LEO in the daytime.