The Star Wars Battlefront Orbital Strike power up lets you call in a cannon barrage from orbiting ships that will rain down on an area that you select. When you use this power up you will have to first select an area for the ships to target, once the target area has been selected, the cannons will begin to fire.
This particular power up can be quite deadly, but you have to use it at the right time and wait for the perfect moment. The enemy will be alerted when the Orbital Strike begins which gives them a chance to run and hide. If you have a good vantage point, and wait for the perfect time to strike, this can be very deadly.
If you would like to discuss the Power Ups then visit our Battlefront Power Ups forum.