Nuvi 310 WAAS/EGNOS

ggdok · Occasional Visitor Joined: Apr 19, 2007 Posts: 6

Can someone please explain this WAAS/EGNOS in simple non jargon english please?

I have it switched on in my Nuvi 310 settings but I dont know what it does or if Im at any advantage or disadvantage by having it on or off.

Thanks.

BeatO · Posted: Sat Jun 02, 2007 1:37 pm Post subject:

M8

In Europe, the EGNOS is the system sending correction data from geostationary satellites to improve the accuracy of the position you're device is capable of detecting.

This is done with a network of ground station receiving all the available GPS signals at those locations and with the knowledge of the exact antenna position of each ground station, which must be know with the accuracy of centimeters, the errors are calculated. That data of all the ground stations is sent to a central computer calculating the signal errors and the like of the GPS satellites in combination with all other stations, builds some kind of error map with that, which in turn is sent up to the three satellites available which you are able to receive in Europe.

If you look at the GPS screen of your Garmin unit, you should notice that it might receive signals from satellites with numbers bigger that 32, namely the following three are available to cover the European region:
AOR-E PRN 120 is Garmin ID 33
ARTEMIS PRN 124 is Garmin ID 37
IOR-W PRN 126 is Garmin ID 39

At the moment, 33 and 39 should be available, if you've got a clear view to the geostationary satellites above the equator.

The User Support page of EGNOS is located at http://asqf-gnss.com/mambo/index.php, click on SIS Schedule to see the current operation details.

WAAS is a very similar and compatible system for the US region.

Does that explain it?

BeatO

ggdok · Occasional Visitor Joined: Apr 19, 2007 Posts: 6

Thanks BeatO...thats as clear an explanation as I ever got. Very helpful indeed. Based on that information, I'll keep it switched on.

Cheers mate.

MaFt · Posted: Mon Jun 04, 2007 8:10 am Post subject:

philpugh · Posted: Mon Jun 04, 2007 3:11 pm Post subject: Re: Nuvi 310 WAAS/EGNOS

inspiredron · Posted: Mon Jun 04, 2007 10:47 pm Post subject:

I believe that use of WAAS/EGNOS increases battery consumption.

philpugh · Posted: Tue Jun 05, 2007 8:29 am Post subject:

foxcube · Occasional Visitor Joined: Jun 05, 2007 Posts: 1

Hi. I'm new to dedicated satnavs (although not GPS in general) and have just bought a Nuvi 300. I'm getting satellite 33 with a solid bar. Does that mean that the EGNOS data is actually being used? I've heard that on other Garmins, a 'D' appears in the bar for each satellite if the EGNOS data is being applied to it.

Brian

djben9 · Occasional Visitor Joined: Sep 12, 2006 Posts: 55

thanks for that, i had mine on then off....didnt really know what it did!

learn new thing everyday :D :D

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