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Subject: Weird GPS issue rss

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Rob
United States
30° 12′ 38″ N, 95° 45′ 2″ W
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Anybody know what's going on? I use a Garmin nuvi, and use it in two cars.

- I've installed it at the same spot on both cars - about midway down the front windshield
- I've driven through the same neighborhoods and streets, same times during the day.

In my Hyundai Elantra, it picks up a satellite within seconds after booting up. In the Kia Sedona, it can take much, much longer. Today, for example, it took about 20 minutes before it finally picked up a satellite. It's happened too consistently for it to be a random event. Also, today, in the Kia I finally had to install it on the passenger window before it picked up anything. Could there be different metals or other materials interfering with a signal, even on the windshield?
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Paul DeStefano
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Try reversing the polarity.

Scotty says that fixes pretty much everything.
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David K.
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Could it be the rado antenna wires in your windshield? I know these have been known to cause issues with the RFID Toll Tag stickets. Other than that, I got nothing...
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Key Locks
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It could be that the Kia obstructs the unit's view to the sky more than the other car. GPS units are funny that way.
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Maybe there isn't enough power going to the GPS in one car. You plugging this into a lighter socket?
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Rob
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Quote:
Could it be the rado antenna wires in your windshield? I know these have been known to cause issues with the RFID Toll Tag stickets.


Well, both vehicles have a toll tag. However, the Kia has an in-windshield antenna, where the Hyundai has a conventional antenna. So, that's a possibility

Quote:
It could be that the Kia obstructs the unit's view to the sky more than the other car. GPS units are funny that way.


I was thinking this. The Hyundai has a more swept back windshield, so from the same position on the windshield, the GPS sees more sky. However, I moved it farther down, towards the dash, and no difference in picking up a signal. Although, that's still a possibility, because it eventually has found a signal during other times.

Quote:
Maybe there isn't enough power going to the GPS in one car. You plugging this into a lighter socket?


Yes for both cars, although the GPS battery is fully charged, and seems to boot completely in both cases - to where I can punch in an address and have it start looking.
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Billy McBoatface
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Your GPS needs a good view in all directions because the satellites will be all around you in the sky. If you can only see forward, then you won't have any signals from behind you, which is needed for an accurate positioning.

My guess: The Kia's roof has a metal sheet that blocks the radio signals. The Hyundai's roof has a different construction that does not block the signals.
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George Kinney
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The Sedona has tinted rear windows like most mini-vans doesn't it? A lot of window tinting material is metallic. Which will interfere with the GPS signal.

FWIW, I have noticed the same issue with my Dodge Grand Caravan. Acquiring a good signal can take 5-10 minutes, while it usually takes less than 2 in my Toyota Avalon with the same GPS unit.
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Steve Vondra
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Just cross the streams.
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David Kahnt
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wmshub wrote:
My guess: The Kia's roof has a metal sheet that blocks the radio signals. The Hyundai's roof has a different construction that does not block the signals.


So the Kia is the aluminum hat of the car world?

...cool...

-DK
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