On Fri, 2011-04-15 at 22:29 +0000, David Lawley wrote: > My new generation GPS's such as a late model Garmin, and a leadtek > blutooth GPS seem to get a lock indoors just fine, whilst all my older > models cannot. > Interesting.
Can you post details of the GPS that does work indoors, especially what receiver chipset it uses, and what your house is made of? My most recent unit is a Binatone B.350, which uses the Sirf Atlas III or IV GPS chipset. My house has double glazed windows 13" masonry walls and a tiled, foil-lined roof: not exactly the sort of place you'd expect a GPS signal to penetrate! Martin > Dave L > ---------------------------------------- > > From: mar...@gregorie.org > > To: xcsoar-user@lists.sourceforge.net > > Date: Fri, 15 Apr 2011 20:20:59 +0100 > > Subject: Re: [Xcsoar-user] Help > > > > On Fri, 2011-04-15 at 14:44 -0400, Bill Hanson wrote: > > > > > It seems > > > that the GPS on the phone does not work in my office - it worked when I > > > started it last night while driving - I will test it again tonight. > > > > > That isn't surprising. In general a GPS won't work indoors because the > > satellite signal is very weak and doesn't generally penetrate into > > buildings. None of my GPS units (a couple of Garmin GPS II+ handhelds, a > > Garmin GPS 35 'blind receiver', a Tomtom satnav and a Binatone B.350 > > satnav) will work indoors and I don't expect my newly acquired RedBox > > FLARM to do so either. > > > > However, a phone can find out where it is, though at lower accuracy, as > > long as it has a signal and is running an application that can get the > > information from the network. That only works because the network knows > > which cell your phone is in and where its cell towers are. This is such > > low accuracy information that it would be useless to XCSoar and hence > > would be ignored even if the phone makes it available. > > > > > I am not sure if it has to have movement to work??? > > > > > A GPS system knows where it is if it can see three or more satellites > > and its height if it can see 5 or more. It can do this whether its > > stationary or moving. However, it has to be moving to know where North > > is. > > > > > > Martin > > > > > > > > ------------------------------------------------------------------------------ > > Benefiting from Server Virtualization: Beyond Initial Workload > > Consolidation -- Increasing the use of server virtualization is a top > > priority.Virtualization can reduce costs, simplify management, and improve > > application availability and disaster protection. Learn more about boosting > > the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev > > _______________________________________________ > > Xcsoar-user mailing list > > Xcsoar-user@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/xcsoar-user > ------------------------------------------------------------------------------ Benefiting from Server Virtualization: Beyond Initial Workload Consolidation -- Increasing the use of server virtualization is a top priority.Virtualization can reduce costs, simplify management, and improve application availability and disaster protection. Learn more about boosting the value of server virtualization. http://p.sf.net/sfu/vmware-sfdev2dev _______________________________________________ Xcsoar-user mailing list Xcsoar-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xcsoar-user
