[OSM-talk] mapping while hiking

[Lauri Hahne]

2008/4/27 Igor Brejc <igor.brejc at gmail.com>:

> Charles Basenga Kiyanda wrote:
> > Thanks for the suggestions. I hadn't thought about clipping the receiver
> > to the top of my backpack. I also hadn't thought that a lot of small
> > movement, compared to a steady stable displacement, might lower the
> > accuracy. I'll keep that in mind if I try to attach the gps to my
> > forearm and see what happens. Good suggestions frome everyone. I'll keep
> > it in mind.
> >
> > Charles
> >
> >
> I'm using Vista Cx. From my experience and from what I've read from
> other people, I get the best reception if the unit is facing up, as you
> said. I'm not sure small movements affect it that much. I also use
> poles, but when walking on a flat terrain I tend to hold both poles in
> one hand and the unit in the other :). I also try to hold it in the hand
> which does not face a slope, it helps a little bit.
> I did discover one other thing: if I leave the unit turned off for a
> week or so, the unit's clock is no longer in sync, so it shows the
> incorrect time (even by a couple of days). The problem with this is that
> it calculates positions of the satellites using the incorrect time, so
> it takes quite a while to find the right satellites (and then
> synchronize the time). Unfortunately I couldn't find a way to set the
> time manually.
>
> Igor
>
> --
> http://igorbrejc.net
>
>
>
That shouldn't really be a problem unless your receiver uses a very crappy
software because GPS satellites broadcast correct time every 30s. So your
receiver should just pick that. It sounds like your problem is mainly that
it takes time find satellites as your receiver can't make pretty much
assumptions on which satellites it should try find if it has been turned off
for a week.

-- 
Lauri Hahne
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