[OSM-newbies] Detect WAAS/EGNOS mode

[Jeffrey Martin]

Wikipedia says WAAS is made for the western hemisphere. Maybe I'm picking up
MSAS from Japan. (I'm in Korea.)

http://en.wikipedia.org/wiki/Multi-functional_Satellite_Augmentation_System

On Fri, Apr 25, 2008 at 8:34 AM, Iván Sánchez Ortega <ivan at sanchezortega.es>
wrote:

> El Viernes, 25 de Abril de 2008, Jeffrey Martin escribió:
> > Thanks, I'll look for that D, but is it increasing the accuracy?
>
> It should. By using Differential GPS, you're compensating for some of the
> sources of inaccuracy. e.g. you're being told how much drift you are
> experimenting because of the ionosphere, and try to compensate for that
> drift.
>
> You can never be sure that your accuracy will be better. It's statistically
> better, though.
>
> But, for example, you can get caught into an urban canyon, drift to one
> side
> due to poor reception, then drift even more while trying to correct the
> drift
> data from D-GPS information. It's hard to tell if you're not heavily into
> linear equations and all that pretty stuff inside GPSs.
>
> > Will the accuracy reading on the GPS change?
>
> Depends on your GPS. My Navi, for example, says that the Dillution of
> Precision is exactly *zero* when it gets a WAAS/EGNOS signal. With a
> Garmin,
> YMMV.
>
>
> Cheers,
> --
> ----------------------------------
> Iván Sánchez Ortega <ivan at sanchezortega.es>
>
> Un ordenador no es un televisor ni un microondas, es una herramienta
> compleja.
>



-- 
http://bowlad.com
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