[Flightgear-devel] Implementing realistic radar inside the Flightgear engine (original) (raw)

Hi,

I've seen a couple of external radar clients for Flightgear being developed right now. I think that these days, with the advent of Canvas and other improvements, it should be possible and desirable to have a realistic radar station inside Flightgear.

At the moment, I'm only concerned about radar ranges and interference of terrain obstructions, weather, ground clutter. For this purpose, I propose a template implementation of radar transceivers and transponders: It is not possible to provide a detailed terrain picture on every antenna rotation. Sampling all terrrain 360 degrees around the station would cripple performance. Thus, I would just take all positions of aircraft inside the nominal range and perform radio calculations on them, using larger sampling distances and simpler routines for aircraft above a treshhold flightlevel. If terrain around the antenna is obstructing the signal, or weather affects it, we can simulate that correctly.

Transponder responses are also a candidate for the new radio code. Like in reality, it is possible to have radar contact but lose transponder id because of radio issues.

Awaiting comments, Adrian

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