Re: GPS

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From: Marcus Bauer
Subject: Re: GPS
Date: Monday, July 7, 2008 - 10:04 am

On Mon, 2008-07-07 at 18:24 +0200, Mathias Ballner wrote:


It seems nobody gets a quick fix. Times range from 10 to 60 minutes if
any fix at all. There is a similar thread running on the developer list
but no answers from Openmoko. Normal for a cold start would be 
45secs-2min and with agps ~15secs. This is industry standard and stated
on the specs page of u-blox. The GTA01 (Neo 1973) gets a fix in one
minute after a cold start.

All modern chips (and the u-blox is a modern chip) can get a fix without
downloading the full almanac (which takes 12.5 minutes). The ephemeris
is sufficient and comes in 30secs.

I think this is an important issue and hope that Sean or Wolfgang can
give answers. I CC'd Steve too, because this equally effects the VAR
markets.

If they don't answer it is probably the best to send your FR back before
the warrenty expires and buy a new FR once this issue is resolved.

Marcus



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Messages in current thread:
GPS, Yorick Matthys, (Mon Jun 23, 9:32 am)
Re: GPS, Joseph Reeves, (Mon Jun 23, 10:21 am)
Re: GPS, Peter Kraker, (Mon Jun 23, 2:15 pm)
Re: GPS, Kai Römer, (Fri Jul 4, 7:32 am)
Re: GPS, Al Johnson, (Sun Jul 6, 9:12 am)
Re: GPS, Kai Römer, (Mon Jul 7, 12:40 am)
Re: GPS, Kevin Zuber, (Mon Jul 7, 3:07 am)
Re: GPS, Al Johnson, (Mon Jul 7, 3:26 am)
Re: GPS, Al Johnson, (Mon Jul 7, 3:34 am)
Re: GPS, Kai Römer, (Mon Jul 7, 4:39 am)
Re: GPS, Federico Lorenzi, (Mon Jul 7, 5:06 am)
Re: GPS, Al Johnson, (Mon Jul 7, 7:37 am)
Re: GPS, Mathias Ballner, (Mon Jul 7, 9:24 am)
Re: GPS, Marcus Bauer, (Mon Jul 7, 10:04 am)
Re: GPS, Yogiz, (Mon Jul 7, 10:56 am)
Re: GPS, Francesco Cat, (Mon Jul 7, 11:47 am)
Re: GPS, Chris, (Mon Jul 7, 1:33 pm)
Re: GPS, Al Johnson, (Mon Jul 7, 2:40 pm)
Re: GPS, thomasg, (Mon Jul 7, 2:47 pm)
Re: GPS, Joerg Reisenweber, (Mon Jul 7, 4:35 pm)
Re: GPS, W.Kenworthy, (Mon Jul 7, 6:25 pm)
Re: GPS, W.Kenworthy, (Mon Jul 7, 7:02 pm)
Re: GPS, Francesco Cat, (Mon Jul 7, 11:50 pm)
Re: GPS, AVee, (Tue Jul 8, 2:11 am)
Re: GPS, Al Johnson, (Tue Jul 8, 2:37 am)
Re: GPS, Tilman Baumann, (Tue Jul 8, 3:05 am)
Re: GPS, flexd, (Tue Jul 8, 4:09 am)
Re: GPS, Neng-Yu Tu (Tony Tu), (Tue Jul 8, 4:17 am)
Re: GPS, Jay Vaughan, (Tue Jul 8, 4:19 am)
Re: GPS, flexd, (Tue Jul 8, 4:24 am)
Re: GPS, flexd, (Tue Jul 8, 4:36 am)
Re: GPS, Neng-Yu Tu (Tony Tu), (Tue Jul 8, 4:42 am)
Re: GPS, Marcus Bauer, (Tue Jul 8, 4:42 am)
Re: GPS, AVee, (Tue Jul 8, 4:42 am)
Re: GPS, matt joyce, (Tue Jul 8, 4:52 am)
Re: GPS, Al Johnson, (Tue Jul 8, 10:31 am)
Re: GPS, Chris, (Tue Jul 8, 10:58 am)
RE: GPS, steve, (Tue Jul 8, 12:57 pm)
Re: GPS, Chaosspawn23, (Tue Jul 8, 11:11 pm)
German getting started, simarillion, (Tue Jul 8, 11:56 pm)
Re: GPS, Jeffrey Ratcliffe, (Wed Jul 9, 10:57 pm)
Re: GPS, Thomas Gstädtner, (Thu Jul 10, 1:19 am)
Re: GPS, Alexander Paersch, (Fri Jul 11, 4:36 am)
Re: GPS, Jeffrey Ratcliffe, (Fri Jul 11, 4:50 am)
Re: GPS, Alexey Feldgendler, (Fri Jul 11, 5:07 am)
Re: GPS, Torfinn Ingolfsen, (Fri Jul 11, 6:02 am)
Re: GPS, Ole Kliemann, (Fri Jul 11, 10:57 am)
Re: GPS, Tobias Diedrich, (Fri Jul 11, 11:56 am)
Re: GPS, Russell Sears, (Fri Jul 11, 2:34 pm)
Re: GPS, Bumbl, (Fri Jul 11, 2:57 pm)
Re: GPS, andres, (Fri Jul 11, 3:43 pm)
Re: GPS, Russell Sears, (Fri Jul 11, 4:00 pm)
Re: GPS, Russell Sears, (Fri Jul 11, 10:56 pm)
Re: GPS, Jonathan Spooner, (Sat Jul 12, 2:25 am)
Re: GPS, William Kenworthy, (Sat Jul 12, 5:11 am)
Re: GPS, Al Johnson, (Sat Jul 12, 5:49 am)
Re: GPS, Ole Kliemann, (Sat Jul 12, 7:27 am)
Re: GPS, Jim Morris, (Sat Jul 12, 1:59 pm)
Re: GPS, Yorick Moko, (Sun Jul 13, 2:50 am)
Re: GPS, Russell Sears, (Sun Jul 13, 3:48 am)
Re: GPS, Mikko Rauhala, (Sun Jul 13, 4:05 am)
Re: GPS, Ole Kliemann, (Sun Jul 13, 6:00 am)
Re: GPS, arne anka, (Sun Jul 13, 6:39 am)
Re: GPS, BlueStar88, (Sun Jul 13, 10:14 am)
Re: GPS, Joerg Reisenweber, (Sun Jul 13, 10:21 am)
Re: GPS, Russell Sears, (Sun Jul 13, 3:36 pm)
Re: GPS, Timo Jyrinki, (Mon Jul 14, 1:18 am)
Re: GPS, thomasg, (Mon Jul 14, 1:34 am)
Re: GPS, Kalle Kärkkäinen, (Mon Jul 14, 1:45 am)
Re: GPS, Kai Römer, (Mon Jul 14, 2:08 am)
Re: GPS, BlueStar88, (Mon Jul 14, 4:22 am)
Re: GPS, Al Johnson, (Mon Jul 14, 5:41 am)
Re: GPS, thomasg, (Mon Jul 14, 6:05 am)
Re: GPS, Yorick Moko, (Mon Jul 14, 6:39 am)
Re: GPS, Timo Jyrinki, (Mon Jul 14, 6:49 am)
Re: GPS, Jay Vaughan, (Mon Jul 14, 7:23 am)
Re: GPS, thomasg, (Mon Jul 14, 9:20 am)
Re: GPS, C R McClenaghan, (Mon Jul 14, 9:26 am)
Re: GPS, arne anka, (Mon Jul 14, 9:42 am)
Re: GPS, Al Johnson, (Mon Jul 14, 10:06 am)
Re: GPS, thomasg, (Mon Jul 14, 10:06 am)
Re: GPS, C R McClenaghan, (Mon Jul 14, 10:46 am)
Re: GPS, arne anka, (Mon Jul 14, 10:54 am)
Re: GPS, C R McClenaghan, (Mon Jul 14, 11:26 am)