A really good video! The low level stuff was really cool.
A couple of terminology and TTP (Tactics Techniques and Procedures) points from the real world of ELINT collection .
The place where two (2) lines of bearing (LOB) cross on a emitter is called a “two bering cross”. It is not called a “fix”. As stated in the video, many things effect the accuracy of the LOBs. Generally speaking, there is actually a very small likely hood that the emitter willl be exactly on te two line cross.
For a “fix” you need 3 LOBs which will form a triangle (a “three bering fix”). If the LOBs are spaced far enough apart angularly, it should be a fairly small triangle and the emitter should be inside the triangle. However–and this is important–there is still a non-insignificant chance that the emitter will be outside of the triangle…probably not a lot outside but still…it depends on a lot of things, but for DCS purposes, call it a 75% change that it is inside the triangle, meaning a 25% chance that it is outside. Still that is pretty good.
These guys were doing a multiplayer 3 plane and had coms with each other. Ideally, they would have set off of different routes far enough apart to try to detect the same emitter at the same time–communicating between themselves to record time of the “hit” and its parameters (to make sure they have the same emitter).
This is extremely important if the emitter is mobile (SA-8, ZSU-23-4, etc, or a ship) if two or three planes get get 2 or more fixes on the emitter, spread over time, they will show if the emitter is moving (ships are always moving) or stationary. If moving it will give you a rough course and speed. A single plane (or planes in close formation as these were) cannot tell if target emitter is stationary (unless it is something like a SA-3, SA-6 or SA-10 site) or moving, and if it is moving, the fixes will be big and erroneous. Also, you have to do a lot less flying to get fixes.
Now I’m off to fly some of this cool stuff!