According to acquisition and tracking strategy and laser detection theory, an expression of the best Angle of beam divergence under direct detection is provided.
根据捕获跟踪策略和激光检测理论，给出了直接探测情况下最佳光束发散角的表示式。
2
According to the definitions of grads, divergence and rotation, the expression in spherical coordinate system is given from the point of physics.
The ideological activities of the current college students are characteristic of: laying stress on self-expression and practicality, seeking differences and divergence.