On Wed, 25 Jun 2008, Nils Faerber wrote: > Using the ephimeris data from ublox a ublox Antaris 5 receiver can have > a time to first after cold start of less than three seconds! Now that's impressive! (thanks for the info; I stand corrected re. AGPS in non-cellphone devices..) > We already wondered what this GUI is good for ;) > Choosing your region? Oh well... >From running supld on the command line (it normally runs as a daemon from startup) : SUPL daemon version is Mon May 5 12:12:24 UTC 2008 SLP address: supl.nokia.com SLP port: 7275 A-GPS srv address: supl.nokia.com Position timestamp: 1214410112.000000 Position latitude: 49.162067 Position longitude: -123.119614 Position uncertainty: 300 Previous A-GPS req time: 0 Previous A-GPS req status: 0 A-GPS support: 1 NW INIT enabled: 0 Cached assistance data support: 1 Packet data for assistance data allowed: 1 Preferred connection id: Rogers Internet SetId NAI: JohnDoe@xxxxxxxxx PSK EMSK: Wimax BSID: GSM Cell ID by BT support: 0 Debug SLP IP source: provisioned Debug mode: 0 Debug log folder: /media/mmc2/supllog/ agps-ui allows you to choose the "preferred connection id" (it only offered my EDGE connection), but supld downloaded data over the WLAN. agps-ui also has a checkbox to enable "Packet data ..". I presume it means "do you want to incur cellular data charges for downloading an ephemeris?". I don't know how to turn on debugging (DBUS?); nothing is written to /media/mmc2/supllog/. I'm not sure where the positions came from; I suspect from the last position saved by gpsdriver. It's more accurate than geosearching my ip address. I think that supld is exchanging data on DBUS with gpsdriver; the new version links libsupld.so I presume from this that some location data is available from WiMax on the new device, and also from the GPS cell ID. I know the cell ID is available from my Nokia cellphone (I had gnokii running on my laptop via USB, and I built it for the tablet), and I believe Google has been mapping cell locations by driving around (Rogers told me the tower locations were confidential when I asked a couple of years back). Pointing a browser at supl.nokia.com doesn't get you far; I don't know the path, and it may be using a client-side SSL certificate for authentication. I haven't actually tried this much in real life so far. From what you say about ephemeris lifetime, I would hope to get a 30-second fix going outside from somewhere with WLAN but no sky (like my home, or office). I would hope that one could also take an 8-hour plane trip, then use agps-ui to set my approximate location, and get a fix in a minute or two instead of "never". If true, it should go a long way to fixing the GPS woes (thanks, Zoltan). -- Andrew Daviel, TRIUMF, Canada _______________________________________________ maemo-users mailing list maemo-users@xxxxxxxxx https://lists.maemo.org/mailman/listinfo/maemo-users
