How would the relative velocity be altered if B were ahead of A?

假如B在a前面，那么相对速度怎样改变呢？

This paper studies a new guidance law based on the relative velocity deflection angle.

本文研究了一种基于相对速度偏角的导引律。

The simulation results show that the relative velocity has a little influence on the overtaking vehicle but much influence on the overtaken vehicle during the overtaking process.

研究结果表明：超车过程中，相对车速对主超车的影响较小，对被超车的影响很大。

Using telemetering data of fuse and missile-target relative velocity measured by guidance equipment to estimate the miss distance is discussed. The principle is feasible and method is simple.

利用引信的多普勒遥测数据和导引头测量的弹目相对速度进行脱靶量估算，其原理可行、方法简单。