There is already a product on the market call RECCO. It is a two part system very similar to what you described. The reflector is seen directly into coat, boots

There is already a product on the market call RECCO. It is a two part system very similar to what you described. The reflector is seen directly into coat, boots, you name it. SAR then uses a device that sends out a signal that bounces off the reflectors. https://recco.com/technology/ https://recco.com/technology/