On Mar 25, 2013, at 8:15 AM, Joseph Armbruster <[email protected]> wrote: > I can not decide how to implement ground footprints with my google earth > satellite tracker.
InstantTrack uses a spherical Earth model for ground footprints. > option 3 : use a digital elevation model and an ellipsoidal model to cull-out > regions that are not visible due to geographic features and project an > irregularly shaped polygon downwards towards the footprint > I believe that local terrain is dominant over any large-scale terrain effect you'd be able to see on a footprint map. It would be worth modeling for AOS/LOS or mutual visibility purposes. 73 -Paul [email protected] _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
