GPS SYSTEMS

In the followin trials we experimented with accuracy of three different Garmin GPS units. We placed them in a stationary position outside with a clear view of the sky. We then proceeded to check them every ten minutes for one hour. With this experiment you can tell the consistency of the units in an hours time.

Garmin Etrex Legend

Time	Altitude	Latitude	Longitude
2:25 pm	701 Feet	N 44° 19.066'	W 88° 16.393'
2:35 pm	698 Feet	N 44° 19.066'	W 88° 16.397'
2:45 pm	687 Feet	N 44° 19.069'	W 88° 16.391'
2:55 pm	711 Feet	N 44° 19.068'	W 88° 16.392'
3:05 pm	726 Feet	N 44° 19.067'	W 88° 16.395'
3:15 pm	703 Feet	N 44° 19.068'	W 88° 16.392'
3:25 pm	699 Feet	N 44° 19.068'	W 88° 16.391'

Altitude Range = 39 Feet -- Latitude Range = .003’ -- Longitude Range = .006’

Garmin GPS 12

Time	Altitude	Latitude	Longitude
1:00 pm	645 Feet	N 44° 26.707'	W 88° 04.326'
1:10 pm	632 Feet	N 44° 26.713'	W 88° 04.326'
1:20 pm	634 Feet	N 44° 26.713'	W 88° 04.327'
1:30 pm	646 Feet	N 44° 26.714'	W 88° 04.327'
1:40 pm	635 Feet	N 44° 26.715'	W 88° 04.327'
1:50 pm	640 Feet	N 44° 26.716'	W 88° 04.327'
2:00 pm	625 Feet	N 44° 26.714'	W 88° 04.326'

Altitude Range = 26 Feet -- Latitude Range = .009’ -- Longitude Range = .001’

Garmin Rino 110

Time	Altitude	Latitude	Longitude
2:25 pm	684.5 Feet	N 44° 19.069'	W 88° 16.392'
2:35 pm	693.3 Feet	N 44° 19.069'	W 88° 16.389'
2:45 pm	720.3 Feet	N 44° 19.068'	W 88° 16.389'
2:55 pm	701.8 Feet	N 44° 19.070'	W 88° 16.388'
3:05 pm	733.0 Feet	N 44° 19.067'	W 88° 16.394'
3:15 pm	725.9 Feet	N 44° 19.067'	W 88° 16.394'
3:25 pm	704.3 Feet	N 44° 19.068'	W 88° 16.391'

Altitude Range = 48.5 Feet -- Latitude Range = .003’ -- Longitude Range = .006’

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