[OSM-talk] EGNOS

Barnett, Phillip PHILLIP.BARNETT at ITN.CO.UK
Mon Oct 5 17:56:49 BST 2009


Strictly true, but effectively they're the same, except for the delivery mechanism for broadcasting differential corrections - groundbased UHF radio for DGPS and geostationary satellite broadcast for WAAS/EGNOS.
The D symbol just shows that differential readings are being received.




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-----Original Message-----

From: talk-bounces at openstreetmap.org [mailto:talk-bounces at openstreetmap.org] On Behalf Of Martin Koppenhoefer
Sent: 05 October 2009 17:32
To: Dave F.
Cc: OSM Talk
Subject: Re: [OSM-talk] EGNOS

2009/10/5 Dave F. <davefox at madasafish.com>:
> Martin Koppenhoefer wrote:
>> 2009/10/5 Dave F. <davefox at madasafish.com>:
>>
>>> Barnett, Phillip wrote:
>>>
>>>> You can tell when it's working as some of the satellite reception bars will have a capital D above them.
>>>>
>>>>
>>> Is that correct?
>>> I sometimes get the D's displaying even if I have no reception (no bar
>>> showing).
>>> I've got a Garmin GPSmap 60C. Any body else get that quirk?
>>>
>>
>> this unit (60 C) supports DGPS according to Garmin manual (DGPS is not
>> available in later GPSs like 60CSx).
>>
> Correct me if I'm wrong, but I thought DGPS was superseded by WAAS. The
> software has a WAAS enabled option, but they just didn't update the D to
> a W.

don't know what superseded means, but DGPS is not WAAS/EGNOS. Read
Wikipedia for more info.

cheers,
Martin

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