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Posted by Gwyn on March 11, 2006, 2:13 am


Is there any point in turning on my waas in the UK or is it US-centric
--
Gwyn. *spamtrap* remove rem if replying
gwyndewey.btinternetrem.com

Posted by SKM-PSN#55 on March 11, 2006, 5:03 am


FYI,, as per the following link EGNOS is still testing, but it might
be fun and educational to turn WAAS on and see what is happening??? Do
you get hollow, or solid bars and or do you get differential
indications,,,, Then take your GPS to a known location and see how
it does??? Does WAAS make it better, or worse??? Sat. IDs to look
for would be 33 at 15.5 W,, 37 at 21.5 E,, 39 at 25 E,, 43 at 63
E,,,, 33 has been reassigned as a test bed and 43 is a new bird,,
sooooo, who knows what they will show??? There is also a new bird
at 53 W,, They are testing now,,, I think it is to replace the one
they are moving from 54 W to 142 W,, If you can see that far west,
look for sat ID 34. Sat. ID 44 at 64 E was shut down in May of
05.
Make sure the link doesn't get wrapped, if it does, copy and paste!
http://ravel.esrin.esa.it/docs/egnos/estb/IMAGEtech/imagetech_realtime_html.htm
Stephen
PSN Station #55


Posted by Sam Wormley on March 11, 2006, 8:07 am


Gwyn wrote:
> Is there any point in turning on my waas in the UK or is it US-centric

WAAS is a regional augmentation of GPS in North America, and
of little use in Europe.

An Essential Element of WAAS -- spatial correlation.

"Differential GPS involves the cooperation of two receivers, one
that's stationary and another that's roving around making position
measurements. The stationary receiver is the key. It ties all the
satellite measurements into a solid local reference." -- Trimble
Navigation Ltd.

In the case of WAAS, the "reference receiver" is a
network of ground stations. The WAAS differential corrections
based on that reference network would be valid for a
WAAS enabled GPS receiver that is within or spatially close to
the reference network.

-Sam Wormley
http://edu-observatory.org/gps/dgps.html

Posted by Dale DePriest on March 15, 2006, 10:17 am




Sam Wormley wrote:

> Gwyn wrote:
>
>> Is there any point in turning on my waas in the UK or is it US-centric
>
>
> WAAS is a regional augmentation of GPS in North America, and
> of little use in Europe.

True but not very applicable to the question. The menu system for most
GPS units use WAAS as a generic term that is applicable to WAAS, EGNOS,
and MSTAT so far and likely more in the future.

Dale

--
_ _ Dale DePriest
/`) _ // http://users.cwnet.com/dalede
o/_/ (_(_X_(` For GPS and GPS/PDAs

Posted by Sam Wormley on March 15, 2006, 10:31 am


Dale DePriest wrote:
>
>
> Sam Wormley wrote:
>
>> Gwyn wrote:
>>> Is there any point in turning on my waas in the UK or is it US-centric
>> WAAS is a regional augmentation of GPS in North America, and
>> of little use in Europe.
>
>
> True but not very applicable to the question. The menu system for most
> GPS units use WAAS as a generic term that is applicable to WAAS, EGNOS,
> and MSTAT so far and likely more in the future.
>
> Dale
>

You are correct, Dale. The name, WAAS (Wide Area Augmentation System),
*is* descriptive of the similar implementations of WAAS. My apologies
to Gwen and the newsgroup.

-Sam


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