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adamf
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Joined: Jul 31, 2004
Posts: 410
Location: wolverhampton
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 Posted: Wed Jul 27, 2005 8:49 pm Post subject: what does the d mean in the satellite signals?? |
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| please help?? |
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oddsock
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Joined: May 01, 2004
Posts: 706
Location: Monmouthshire
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| Posted: Wed Jul 27, 2005 9:06 pm Post subject: |
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If its the same as my gpsmap 60c it means the data is being corrected by WAAS in the US or The European Geostationary Navigation Overlay Service in Europe
Dave |
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barryd
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Joined: Mar 27, 2004
Posts: 285
Location: Cheshire, England
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| Posted: Wed Jul 27, 2005 9:09 pm Post subject: |
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Don't know your specific Garmin model, but this usually indicates that the unit has a Differential GPS fix rather than a standard GPS fix. This should typically improve its positional accuracy a bit.
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Barry Davies
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adamf
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Joined: Jul 31, 2004
Posts: 410
Location: wolverhampton
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| Posted: Wed Jul 27, 2005 9:11 pm Post subject: |
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| yea its the m5 pda it says 3d diff just courious im in wolverhampton and the settings are standard not wass enabled?? |
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Skippy
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Joined: 24/06/2003 00:22:12
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Location: Escaped to the Antipodies! 36.83°S 174.75°E
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| Posted: Thu Jul 28, 2005 10:52 am Post subject: |
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If it says 3d Diff and you have a D in the bars then you most definately have WAAS (aka EGNOS) enabled.
You should see a sat with a number 33, 39 or 44 which is the WAAS one.
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adamf
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Posts: 410
Location: wolverhampton
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| Posted: Thu Jul 28, 2005 1:14 pm Post subject: |
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| ahh doh///waas is enabled but does this work or make any difference in the uk? |
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Tim Buxton
Pocket GPS Moderator
Joined: 14/09/2002 20:56:18
Posts: 5231
Location: Surrey, United Kingdom
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| Posted: Thu Jul 28, 2005 2:50 pm Post subject: |
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| Skippy wrote: | If it says 3d Diff and you have a D in the bars then you most definately have WAAS (aka EGNOS) enabled.
You should see a sat with a number 33, 39 or 44 which is the WAAS one. |
I've never seen any sats above 29 on my GPS V. 
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oddsock
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Joined: May 01, 2004
Posts: 706
Location: Monmouthshire
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| Posted: Thu Jul 28, 2005 3:53 pm Post subject: |
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I know nothing about the GPS V but if it has a" battery save mode"and it is in that mode it won't receive waas!
Dave |
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Tim Buxton
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Joined: 14/09/2002 20:56:18
Posts: 5231
Location: Surrey, United Kingdom
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| Posted: Thu Jul 28, 2005 6:33 pm Post subject: |
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Ah, thanks for that; I'll have a look.
Bingo, thanks for the info.. 3D Differential fix attained; seven sats with a D at the borrom of each and a claimed accuracy of 6' - nice. :D
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Tim
Last edited by Tim Buxton on Thu Jul 28, 2005 6:53 pm; edited 1 time in total |
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adamf
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Joined: Jul 31, 2004
Posts: 410
Location: wolverhampton
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| Posted: Thu Jul 28, 2005 6:44 pm Post subject: |
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| but does waas work in the uk 8O 8O 8O 8O 8O 8O 8O |
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oddsock
Pocket GPS Verifier
Joined: May 01, 2004
Posts: 706
Location: Monmouthshire
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| Posted: Thu Jul 28, 2005 10:34 pm Post subject: |
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yes!some of the time.If you follow some of the links in this thread you may find answers
Dave |
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Skippy
Pocket GPS Verifier
Joined: 24/06/2003 00:22:12
Posts: 2946
Location: Escaped to the Antipodies! 36.83°S 174.75°E
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| Posted: Fri Jul 29, 2005 8:45 pm Post subject: |
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| adamf wrote: | | but does waas work in the uk |
Not especially well in my experience.
I was in New York the other day and the Quest locked on with a 3D-Differential lock in about 60 seconds from cold and I didn't even have an especially good view of the sky.
It always seems to take about 5 minutes to get a 3D-Diff lock here in the UK and that's when I am standing on top of a hill!
Anyone else tried it?
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adamf
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Posts: 410
Location: wolverhampton
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| Posted: Fri Jul 29, 2005 9:51 pm Post subject: |
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it always gets a 3d lock in wolverhampton outdoors even on the window ledge 8) but its not as reliable as the bt clipon on xt mode  may not be as acurate but it is twice as reliable especialy trees buildings etc???? |
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