Re: GPS unable to lock while moving

On Tue, 26 Jul 2005 15:45:54 -0400, Jack Yeazel
<jack@xxxxxxxxxxxxxxxxx> wrote:

>Dale DePriest and I had a big argument about GPS in airplanes about two
>years ago... If it takes 5 minutes to get a lock in an airplane, it's
>due to not having a clear view of the sky -not due to the aircraft
>speed...
>
>To further the argument, I attached an amplified antenna to the window
>of a Delta flight to power a GPS-V from a cold start, and it locked on
>in 48 seconds...
>
>The absolute quickest a GPS can lock on from a cold start is between 31
>seconds and 61 seconds -depending when it starts looking for SATs during
>the 30-second navigation message... Other flights took somewhere
>between these two limits... I (think) Garmin defines a 'cold start' is
>after 20 minutes OFF...

Jack,

I'll be doubly careful when I make any future observations. It's
still possible that the cause is indeed interruptions by
obstacles when one moves.

Hans-Georg

--
No mail, please.
.

Relevant Pages

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