On 23/03/2010 12:21, John Smith wrote: > On 23 March 2010 21:56, David Earl<[email protected]> wrote: >> I wonder whether they might be interested in offering us some units for >> testing? > > Using inertial navigation the accuracy deteriorates considerably over time. > > http://en.wikipedia.org/wiki/Inertial_navigation
Yes, obviously. The problems we have are exactly the ones they are trying to solve though - urban canyons and tunnels - where we lose the GPS accuracy for a short while. I don't think they're suggesting they are a substitute for GPS, just to augment it where GPS can't reach. If they are looking at military applications, the accuracy has to be an order of magnitude better than we would need as is their GPS. David _______________________________________________ talk mailing list [email protected] http://lists.openstreetmap.org/listinfo/talk
