Re: GPS

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From: Peter Kraker
Subject: Re: GPS
Date: Monday, June 23, 2008 - 2:15 pm

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This timings are insane unless you don't even have a valid almanac, 
which is rare. This doesn't look right.

Yorick Matthys pravi:


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This timings are insane unless you don't even have a valid almanac,
which is rare. This doesn't look right.<br>
<br>
Yorick Matthys pravi:
<blockquote cite="mid:BAY140-W30E8C58A2CDC008B6CE3C6FBA60@phx.gbl"
 type="cite">
  <pre wrap="">Marcus Bauer said:
  </pre>
  <blockquote type="cite">
    <pre wrap="">My experience with the Freerunner is ~12 minutes TTFF (time to first
fix) without use of agps and ~4-8 minutes TTFF with agps from
agps.u-blox.com using the software from openmoko.

The Neo1973 (GTA01) had a TTFF without agps assistance of ~2 min.
    </pre>
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  <pre wrap=""><!---->
12 minutes without AGPS and 4-8min with AGPS??
I hope there was a thunderstorm inside the basement where you tested this... :)

Seriously, these just don't seem realistic.
Compare them for example with some other devices from 2003: <a class="moz-txt-link-freetext" href="http://www.pocketgpsworld.com/ttffcomparisons.php">http://www.pocketgpsworld.com/ttffcomparisons.php</a>.
Or from ublox: <a class="moz-txt-link-freetext" href="http://www.u-blox.com/technology/assistnow/">http://www.u-blox.com/technology/assistnow/</a> (table at the bottom of the page)

Surely there must be something wrong with your software/settings/hardware/environment...
(or maybe they still have a lot of work to do on the GPS :))

y

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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)