Alex Perry writes: > > > Any three-antenna DGPS install can, > > > among other things, replace all the INS platform (ignoring availability). > > Norman responded: > > AFAIK You don't need DGPS for heading > > I don't see how you'll manage heading reliably without going differential. > The two links you pointed out, for example, were differential systems.
The more separation between the antennas the better but a 'relative to each other' a multiple antenna system locked to the same 'clock' for each satelite is its own differential system with respect to the differance in the SAME signal recieved at the two locations. Not this is only valid for the relative 'position difference vector' which just happens to the directional vector between the antenae eg heading :-) absolute measurements such as position and/or elevation are a different story in other words since all antennas are receiving the same error the error is nullified in relative position calculations cheers norman _______________________________________________ Flightgear-devel mailing list [EMAIL PROTECTED] http://mail.flightgear.org/mailman/listinfo/flightgear-devel
