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On Fri, 26 Mar 2010 18:42:53 +0000 (UTC), Kat Rabun wrote:
Altitude from a satellite lock alone kinda sucks, because the angles
involved tend to be closer to perpendicular to the axis of movement most
of the time. That is, altitude is best triangulated by measuring the
speed up or down the signal from a satellite overhead or as close to
overhead as possible. And mostly the satellites TEND TO be down closer
to the horizon at any particular point in time. So even tiny little
variations in atmosphere can make for fairly wide altitude swings.
--
"Only Irish coffee provides in a single glass all four essential food
groups: alcohol, caffeine, sugar, and fat."
-Alex Levine
- Garmin Keygen version 1.3 by JetMouse
- Garmin GPS
- 2008-01-03
- Garmin registration help
- Garmin GPS
- 2007-01-14
- Garmin POI loader problem
- Garmin GPS
- 2006-07-12
- Garmin City Select.
- Garmin GPS
- 2005-10-11
> something like 15 foot accuracy, yet, when I stop the car, the elevation
> bounces around for minutes.
> The amount that the elevation goes up or down in those minutes is often
> more than the accuracy listed, e.g., if it says 15 foot accuracy, the climb
> up could be something like 20 or 30 feet and then, all the while still
> sitting in the same spot with 8 to 10 satellites at full bar, it still
> bounces, sometimes down about 5 or so feet.
> What's going on?
> Why does it take 3 to 5 minutes for the Garmin to get close to an elevation
> while sitting still in full view of plenty of satellites? Why doesn't it
> ever lock on an elevation?