On the civilian GPS precision capabilities.
Not to overkill the subject but I use a GPS based telemetry system for lap
times and analysis in my track car. The system uses WAAS, 10 HZ refresh
rate, and superimposes Google maps pictures of the track with the GPS
calculated car trajectory. You'd be amazed at how precisely it shows the
trajectory of the car on the racetrack, seemingly down to inches.. Using
the analysis software you can clearly see the depiction of the car's
trajectory straddling the curbs (The race track's curbs are about 24
inches wide) while sometimes moving at 100+ MPH on corner entry and exits.
According to the US gov " A WAAS-capable receiver can give you a position
accuracy of better than 3 m, 95 percent of the time"
The B&G Zeus Touch2 I installed earlier this year also uses WAAS and a 10
mhz refresh rate. Looking at the boat's depiction vs my noted location of
the racing markers on our racecourses.. It's spot on.
-Francois Rivard
1990 34+ "Take Five"
Lake Lanier, Georgia
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