Curtis L. Olson writes: > > Mat Churchill wrote: > > >Hoping to pick up on flying lessons again and was wondering if I can > >record NMEA flight data of my lessons and play it back in FG ? > >To add to this does anyone know of a way of recording bank angle / glide > >path in a format usable by FG ? > >Playback of real flights would be a nice feature. > > > > > > Other's have shared some good ideas, but here's one I haven't seen. > People have experiented with mounting 3 gps's on an aircraft. They find > that the absolute error of all three gps's are subject to traditional > limitations, *but* they all see the same view of the sky and they same > satellite arrangement so their *relative* errors are very small. People > have had really good luck deriving attitude information from the 3 gps > receivers. I'm told the antennas can be mounted relatively close to > each other (i.e. a couple feet) and still get pretty good accuracy. I > even saw a video tape of a real approach with actual video show next to > a synthetic view and the two synced amazingly well. I have heard that > companies make triple antenna units specifically to do this, and it's my > understanding that you can just use 3 separate gps units.
Yup, using 3 differential GPS units has become a 'standard' way of doing this http://www.fig.net/pub/proceedings/korea/full-papers/pdf/session17/stathas-karabelas-liapakis-psarianos-kontaratos.pdf http://waas.stanford.edu/~wwu/papers/gps/PDF/DeLorenzoIEEEPLANS04.pdf however with a little ingenuity one could build a satisfactory system around this neat device for *much* less money https://www.fmadirect.com/site/Detail.htm?item=1489§ion=20 Cheers Norman _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
