Summary of Averages for Waldo Canyon Trail Test
 
This is a summary of data found in other files whose links are found on the page from which this one was linked. Because of the limited number of samples be careful about drawing conclusions. Also note that each receiver didn't necessarily get the same kinds of satellite constellations since only three of the four where used at the same time.

The GPS receivers are: Garmin GPSmap76, GPS 76, eTrex Venture, and 12XL. The numbers are in meters except the elevation, which is in feet. The count is the number of points in the average.

    Meters Offset from Average Standard Deviation "of Population"  
Easting Positive Offset Easting Negative Offset Northing Positive Offset Northing Negative Offset Easting STD Northing STD Elevation STD Count
Data for all receivers and all points:
Average: 7.0 7.7 10.1 10.4 2.8 3.8 22.1
Maximum: 20.6 28.1 50.0 42.8 6.7 10.6 63.1 1251
Data broken down by receiver:
Map 76 Average: 4.3 3.9 5.7 6.7 2.3 3.3 21.3  
Maximum: 12.1 17.4 39.6 27.1 5.5 10.5 62.3 1968
GPS76 Average: 4.9 5.3 6.6 7.3 2.5 3.4 20.5  
Maximum: 14.6 14.6 27.6 26.7 4.9 8.7 56.4 1371
Venture Average: 5.4 6.0 7.8 6.8 3.0 3.7 20.8  
Maximum: 21.1 27.4 49.6 40.7 8.8 15.1 89.6 1627
12XL Average: 4.8 5.3 6.8 7.3 2.6 3.6    
Maximum: 18.3 19.8 42.9 40.8 6.4 12.1   990
Data recorded when receiver was using its internal antenna:
GPS76 Average: 3.8 4.1 5.1 3.9 2.3 2.5 16  
Maximum: 14.4 14.2 26.2 12.8 6.4 7.7 52 769
12XL Average: 4.2 4.3 5.0 5.9 2.7 3.5    
Maximum: 17.3 11.8 15.8 36.1 8.2 14.1   968
Data recorded when receiver was using its external antenna:
GPS76 Average: 3.9 3.6 5.0 6.5 2.2 3.4 21  
Maximum: 9.8 9.2 11.6 22.7 5.2 10.7 72 794
12XL Average: 3.2 3.3 4.5 3.8 1.9 2.4    
Maximum: 14.6 20.4 41.6 33.5 7.3 12.8   159
Data recorded at points with a good view of sky:
The points are:  JN9, RIG2, RIG5, RIG6, RIG7, SIG1, SPU2, VWP1
Map 76 Average: 3.0 1.9 3.2 3.3 1.3 1.9 13.4  
Maximum: 4.2 2.2 5.4 4.8 1.8 2.5 17 275
GPS76 Average: 2.8 4.5 5.3 4.2 1.5 2.2 12  
Maximum: 3.9 5.7 7.1 5.1 1.7 2.5 15 211
Venture Average: 4.8 5.1 6.7 5.6 2.2 2.7 18  
Maximum: 6.2 6.9 8.1 7.5 2.8 3.0 36 253
12XL Average: 4.6 5.2 6.4 6.7 2.1 3.0    
Maximum: 7.1 6.1 9.4 8.6 2.4 3.6   131
Data recorded at points with a poor view of sky:
The points are:  IST2, IST3, IST4, IST5, IST6, IST8, JN2, SWB16
Map 76 Average: 5.0 6.3 8.4 9.2 3.1 4.6 30  
Maximum: 8.6 13.7 14.9 27.1 4.6 10.5 42 243
GPS76 Average: 8.3 8.8 13.9 11.6 4.0 5.3 30  
Maximum: 14.1 14.6 27.6 26.7 4.9 8.1 40 186
Venture Average: 12.3 12.6 22.7 17.7 6.3 8.6 46  
Maximum: 21.1 19.0 40.3 40.7 8.8 15.1 90 209
12XL Average: 10.5 11.5 19.4 15.1 4.6 6.7    
Maximum: 18.3 19.8 42.9 40.8 6.4 12.1
 


 
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