Nav Unit Lost
 

Re: Nav Unit Lost
 

GPS satellites are in constant motion. Signal quality will change day by day, hour by hour. If the problem persists, have it looked at. remember, GPS signals are weak, and your car needs "line of sight" to a large chunk of sky. GPS does not work through buildings or heavy tree cover.

Re: Nav Unit Lost
 

I am mostly in open areas all day and still no signal, is there a fix for this, move the reciever or something like that. when i went to the coast on the way there i got signal and it all lined up but as soon as i got back to fresno it got lost again, clock doesnt work most of the time either

Re: Nav Unit Lost
 

Yup, do what I did. Dump the POS factory NAV that came in it & install something like this:

http://www.pbase.com/jmorton10/inbox&page=all

~John

Re: Nav Unit Lost
 

What year is your FEH? And what do you mean the clock doesn't work? Pre-2008, the clock system is independant of the other systems, if it's not working correctly, that's an indication that there's something wrong electrically.

Re: Nav Unit Lost
 

The clock is actually set via GPS in 2005-2007 cars with Navigation.
All you need to do is set the time zone you live in.

Minutes and seconds are always "right on the money" as long as you get a GPS signal once in a while.

-John

Re: Nav Unit Lost
 

i must not be getting signal enough, it will just stop and stay the same time for a long time or sometimes it wont even show a time, i think the signal sucks here in fresno, maybe i need to move the antenna to the roof.:confused:

Re: Nav Unit Lost
 

Actually the GPS satellites are in geo-stationary orbits. They hardly move at all, and they can't, or it wouldn't be very precise. Just like satellite TV, the weather will affect it, however. Rain, clouds and solar flares will deteriorate the signal.

Re: Nav Unit Lost
 

If that's the case, then why doesn't it auto-update when you cross time zones? It knows where you are, it should detect and auto-update, but it doesn't.

Re: Nav Unit Lost
 

I have THIS screen name for a reason.
I've been using GPS for nearly 15 years.
:D

GPS satellites are most certainly NOT in geo-stationary, also known as geosynchronous orbits. I can take a few pages to discuss why not, or you can trust me on this. Or look it up on ANY GPS related web site. I'm sure 100% of the sites will agree on the orbital status of GPS!

Also, GPS has a Universal Time Code ( UTC ).
It is just easier for each end user to set their own offset from UTC. Either hours + or - from UTC.
While actual local time could be derived from UTC and Lat/Lon data, I've yet to see a unit that did. Even the automatic wall clocks always ask you to set the time zone.