[OSM-talk] DGPS on GPRS?

[Erik Johansson]

On 9/6/06, Nigel Magnay <nigel.magnay at gmail.com> wrote:
> It struck me someone on this list might know.
>
> I currently collect trackpoints with a Windows Mobile phone & a tomtom gps
> with some simple software. I note there's a few systems for sending
> differential correction signals to improve the accuracy of the fix.
>
> Are any of these available over the internet? My phone has a fairly GPRS
> connection, and it would seem obvious to me to have the corrections
> available as a web service or similar. Is there such a service ?

I've decided for my self that DGPS isn't very usefull, I might be
wrong. But I base it on this:

0. DGPS was big when the GPS signal was still scrambled, but not now.
1. it's pretty hard to setup
2. you don't really need it
3. the gain is very small if you don't have and expensive GPS, and
want a fix within 2cm..

--
/Erik