Thread: GPS off by about 50 ft

I am sure your problem is the amout of SATs you have locked magnetic mount it on the roof and see what ya get - I bet it will be better
I have a Rikaline 6010 receiver and have no problems with it on the rear dash

hint - get some velcro and put only the HARD side on the bottom of the GPS, it will stick real good to that "carpet" in most rear dashes - also get velcro (both sides) and try your upside down theory - I have thoguht about putting it upside down but havent had a chance- let us know how/if it works

Originally Posted by bobthebaker

my problem is like wtf....i'm using earthmate usb with iguidance 2. The visual navigation is pretty damn close, maybe only 5-10 feet off, but when i hear the voice navigation it's off by like 100 feet. What gives?

Then its not the earthmate's fault. iG will talk when it feels necessary.

Also, my earthmate isn't off by very much at all

Originally Posted by Skipjacks

It's on the rear shelf under the back window. Pitcures are available in the link in my sig line. Think that could be a problem?

I have a BU 303 and it is on the back shelf in my car, get normally 7-8 sats, occasionally drops to 5.

I have noticed that my BU-303 only gets 3 or 4 sats when on my dash but gets 7 to 9 when placed inside my sunroof. It seems to be because of the metallic film they use when tinting windscreens, even though my sunroof has a sort of metallic feeling film with millions of small round holes in it to darken it, it doesn't affect the GPS signal whereas the windscreen does.

It might be worth sticking your sensor out the sunroof or a window just to see if it improves.

Using SirF mode as opposed to NMEA also seems to increase positional accuracy and update speed if you are able to use it.

HTH

John

Most GPS units have a position update rate of once per second. At 45 mph, your car will travel 66 feet in one second. Your mapping software will always display the car symbol one second behind the actual position, unless it can do dead reckoning. The left/right position would not be affected.

Originally Posted by Skipjacks

My GPS, running i Guidance with an Earthmate receiver seems to be about 50ft off. It's got left and right fine, but stright ahead is off by about 50ft when I come to an intersection. It'll tell me to turn in 50ft, when I'm already at the intesection.

Is that just the nature of hte beast or do I need to adjust something?

could it be the earthmate reciever? I have the earthmate reciever and software (though I don't use it anymore in the car) and I noticed that I was off quite a bit as well.....though the software didn't snap to teh road.....

wondering if the reciever might have something to do with it?