I am trying to understand if there is any way to measure the distance between two vehicles, possibly moving, without the aid of GPS. I want to measure a distance of more than 50 meters but less than 100, with an accuracy of at least 5 meters.
The purpose of this type of measurement would be so that vehicles could understand the proximity of each other if out of sight of each other in dense forest/bushland
I would like to read this measurement from both vehicles.
If anyone could give me a push in the right direction, or suggest a way of achieving this, I would greatly appreciate it.