with cold start they mean no previous data: no information about satellites, location or time
since the GPS chip itself does not have any memory, currently a power off -> power on always results in a cold start (there is however some work being done to overcome this, but I don't know if it is already working) On Mon, Jul 14, 2008 at 6:33 PM, C R McClenaghan <[EMAIL PROTECTED]> wrote: > What is meant by "cold start"? Is this simply a power off and power back on? > Or is it the power cycle and no previous fix data for current location? With > other GPS devices, until that first location fix was achieved, nothing > happened, but once achieved and no significant change in geography, then a > fix could be achieved in less than a few minutes. Given that most of these > devices are being received in a location different than where ever the > device may have previously gotten a fix, my thought is part of the problem > is getting that first current location fix. > Chris > > On Jul 14, 2008, at 9:23 AM, thomasg wrote: > > On Mon, Jul 14, 2008 at 2:12 PM, Ken Young <[EMAIL PROTECTED]> wrote: >> >> thomasg wrote: >> >> > This all are no arguments. >> > With my TomTom device I can do a full reset so that no GPS data is >> > available >> > at all (also no time and so on) and still get a fix in < 3 minutes at >> > 100 km/h. >> > Well, I know the freerunner is no specialized gps navigation device, but >> > the >> > fact that the signals are so weak that it's barely possible to get a fix >> > under optimal condition (clear view to the sky, antenna on top, without >> > moving 1 mm) shows, that this is no simple software problem and has to >> > be fixed. >> >> The GPS performance of my Freerunner is also much worse than >> the GPS performance of my neo1973. I've done side-by-side tests of the >> two units many times. My neo1973 gets a good fix in 2 to 3 minutes >> after a completely cold start; it's very reliable. My Freerunner >> initially was getting a fix after 7 or 8 minutes. For the last few >> days it has not been able to get a fix at all. >> >> Ken Young > > I can confirm that, too. > The 1973 gets a cold start fix in less than 2 minutes. > > _______________________________________________ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community > > > _______________________________________________ > Openmoko community mailing list > community@lists.openmoko.org > http://lists.openmoko.org/mailman/listinfo/community > > _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community