GPS

[Joerg Reisenweber]

Antenna is pointing front longaxis.
You have to hold device upright (lanyard hole to ground, AUX-key to sky)!
/jOERG

Am Sa  12. Juli 2008 schrieb Jonathan Spooner:
> I've been playing with my GPS and finally got a fix using agps diag 
> tool. I stood the gta02 up on my garden table using a pop bottle :-)  I 
> think bottom line the gta02 has a poor antenna.... in fact the first 
> time I got a fix I did so at the point I rested my free stylus on top of 
> the gta02!
> 
> Once I had a fix I used the signal strength screen in the agps diag tool 
> and its then plain to see the signal is precarious at best with an 
> average strength of around 28 which is greatly affected by orientation 
> and nearby objects from hands, stylus, people etc pretty much what you'd 
> expect in a device thats receiving a very weak signal.... except we know 
> the say system is working so that only leaves the gta02 internal antenna 
> as the problem.
> 
> Thoughts?
> 
> Jon
> 
> 
> 
> Russell Sears wrote:
> > I played with it a bit more and think i figured out why i wasn't getting 
> > locks quickly.  It looks like my Freerunner's GPS is working after all! :)
> >
> > I've updated the wiki GPS_Problems page with some basic information 
> > about how GPS devices obtain initial locks, and added more 
> > troubleshooting information...  It would have saved me a few hours; 
> > hopefully someone else will find it useful.  Someone familiar with GPS 
> > should probably check it for errors.  Most of what I wrote is based on 
> > things I learned today by word-of-mouth and skimming wikipedia articles.
> >
> > -Rusty
> >
> > Russell Sears wrote:
> >   
> >> This might help too (I should add myself to it...):
> >>
> >> http://wiki.openmoko.org/wiki/GPS_Problems
> >>
> >> I've only gotten a fix using the agps diagnostic tool gui.  I did it in 
> >> the middle of a clear night with nothing near by, by going to the signal 
> >> strength screen, and slowly rotating the phone until the bars started 
> >> turning from light blue to dark blue, and going with an orientation that 
> >> seemed to work, kind of like with an old analog TV set...
> >>
> >> I don't know if doing it actually helped, but while playing this game, I 
> >> got a fix in ~ 2-3 minutes, vs the tens of minutes I'd waited before 
that.
> >>
> >> Bumble, after 10-15 minutes of waiting, do you see any satellites in the 
> >>   "ss" tab of the agps diagnostic tool?  Does it display a time in UTC 
> >> after a few minutes?  If so, we're probably in the same boat.
> >>
> >> Is there a document explaining the exact handshaking procedure the 
> >> chipset in the freerunner uses to lock onto the satellites?
> >>
> >> -Rusty
> >>
> >> andres wrote:
> >>     
> >>> On Fri, 2008-07-11 at 23:57 +0200, Bumbl wrote:
> >>>
> >>>       
> >>>> Be happy
> >>>> I have never got a fix up to now although trying on different locations 
> >>>> for >45min each.
> >>>> I'll consider to use my waranty.
> >>>>         
> >>> probably this is related
> >>> http://wiki.openmoko.org/wiki/FreeRunner_GPS_antenna_repair_SOP
> >>>
> >>>
> >>>
> >>>
> >>>
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> 
> 
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