Remember the video of the raghead in a shallow cave firing a mortar, yelling Allahu Aqbar every time he dropped a mortar shell in the tube.....and by the 4th or 5th shot our guys had the exact reverse azimuth, and the next thing you see is OUR ordnance round exploding in the cave and Muhammad going to meet his 72 Virginians? I think that is similar technology.
We’ve had counter-battery artillery for some time. It is radar detection of artillery rounds, plotting their trajectories, then firing counter battery.
The gunfire is accoustical identification and triangulation.