That very much depends on the laser.  Most of the approaches I&#x27;ve seen discussed involve multiple &#x27;attacks&#x27; on a rock spread out over a considerable period of time.  You only fire when the rock is far enough above the horizon (say 25-30% of the time if you have 1 ground laser).  And then you want to hit it when it is at some sort of apsis, preferably when it is far away with a relatively slow velocity.  The sun has a 24&#x2F;7 line of sight and is always firing.