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Using Tomtom go in central london

 
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escuz
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Joined: Aug 28, 2004
Posts: 3

PostPosted: Sun Aug 29, 2004 12:27 pm    Post subject: Using Tomtom go in central london Reply with quote

I recently bought a tomtom go unit and was very impressed with it around my home area in Manchester

I made a trip down to london a few days back and thought this would give me a good opportunity to test it. The journey to london was fine, it even recognised the M6 toll.

However once I got into central london thats when the problems started, the unit kept losing the GPS signal and so I ended up getting lost a few times waiting for it to get a signal back.

This happened quite frequently even though the buildings weren't particularly that high. Normally I get full gps signal strength but in central london it was almost zero. I also noticed that the unit loses its signal strength much more frequently at night for some reason.

Are there any tomtom users who have the same problems when in central london or do I have a dodgy unit?
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delboy0754
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Joined: Jul 10, 2004
Posts: 296
Location: In the Office

PostPosted: Sun Aug 29, 2004 2:12 pm    Post subject: Reply with quote

Have you got a heated front windscreen, that would cause problems. If so, you will need a re-rad. My unit works fine with no problems since i got a re-rad.
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escuz
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Joined: Aug 28, 2004
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PostPosted: Sun Aug 29, 2004 5:20 pm    Post subject: Reply with quote

I don't have a heated windscreen, out side of central london the gps signal seems to be at more or less full strength so I dont think its the car[/code]
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delboy0754
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PostPosted: Mon Aug 30, 2004 6:32 am    Post subject: Reply with quote

escuz wrote:
I don't have a heated windscreen, out side of central london the gps signal seems to be at more or less full strength so I dont think its the car[/code]


What car do you have?.

It might even have a reflective screen.
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Howarduk
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Joined: Nov 10, 2003
Posts: 241
Location: Essex UK

PostPosted: Tue Aug 31, 2004 12:03 am    Post subject: Reply with quote

I use TomTom in Central London and I agree that in certain parts it is possible to lose the signal perhaps more so than outside of the centre.

The other thing you have to watch in Central London is the amount of one way streets, no left and no right turns that have come into force and are not in TT3

Howard
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Andy_Hill
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Joined: Aug 09, 2004
Posts: 21
Location: Birmingham

PostPosted: Tue Aug 31, 2004 5:52 pm    Post subject: Reply with quote

I have been into cental London many times without problems, you need to double check all your settings etc.
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escuz
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Joined: Aug 28, 2004
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PostPosted: Tue Aug 31, 2004 9:37 pm    Post subject: Reply with quote

What settings do I need to check?

Thanks
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AndyCr15
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Joined: Jul 03, 2004
Posts: 197
Location: London, UK

PostPosted: Thu Sep 02, 2004 8:32 am    Post subject: Reply with quote

I get problems sometimes, usually its when the street I'm on is only two lanes wide and the buildings are 4 or 5 stories high, I think it just has trouble seeing the sats.
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Cherz
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Joined: Aug 19, 2004
Posts: 29

PostPosted: Mon Sep 06, 2004 10:33 am    Post subject: Reply with quote

I've experienced similar problemes in Rome last week. Outside Rome it had excellent singal strength. I think it could be related to the rather narrow streets, somewhat tall buildings (5-6 stories) and lots of trees...

Nothing on my windscreen (Heating, UV, etc), but I guess an external would antenna help, but how much would it actually help in these situations (tall buildings, etc)?

Cherzz
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nej
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Joined: Jun 16, 2004
Posts: 454
Location: London, Ingerlund

PostPosted: Mon Sep 06, 2004 1:06 pm    Post subject: Reply with quote

The problem is fairly common and is known as Urban Canyoning, or, correctly, multi-path error. The symptoms are that either you will not get a lock at all or your position will not be as accurate, due to the signal bouncing off of buildings before it reaches your receiver.

I had a similar problem in Snowdonia over the weekend. Fairly good view of the sky, or so I thought, but lost signal for minutes at a time - damn mountains getting in the way.
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