This is a demonstration of BAE Systems' hostile fire indicator (HFI), an experimental system for detecting small arms fire aimed at helicopters. Many helicopter pilots are equipped with countermeasures to defeat missiles, but remain vulnerable to small calibre weapons. Very often, the helicopter crews are unaware they are being shot at. The HFI is intended to solve this problem, if BAE Systems can prove that it works.
The system is being used to look for high frequency GW's in the meghz. It will be studied for communication.