I saw the “Multi vehicle flying” video, however what I am looking for is slightly different. the Multi vehicle flying video was using only 1 instance of Mission Planner, and one operator was controlling all three. What I am looking for is a way for multiple UAVs, with separate Ground Stations and pilots, to share positional data with each other.
I was taking a looking at MAVProxy, and possibly having the RaspberryPi of one MAVProxy instances collect data from the other ground stations. MyFlyDream has this, and is called FlyTogether, and I think Eagle Tree may be working on something similar. Ultimate goal would be to have MAVProxy and a RaspberryPi accept input from many different types of ground stations and share positional data with all. It probably only has a purpose as a FPV feature, as it would help tremendously with tandem flying.