Relative Accuracy of GPS Data
When working with GPS signals, it is difficult to quote absolute accuracy, due to a variety of factors. The number of satellites in view, the time of day, the location of the G2X Pro GPS antenna along with natural and man made obstacles can affect accuracy.
However, when using GPS signals for track mapping, lap / segment timing and speed, the G2X Pro and Datalink II software provide exceptionally accurate data, which has been tested and verified in years of on track usage.
In typical usage, the speed accuracy is approximately .10 MPH / .16 KMH.
In multi-year testing of G2X Pro vs. trackside beacon laptimes, a variance of .05 has been noted. GPS based laptimes are dependant only upon vehicle location, and can not be affected by sunlight, signal blockage from other vehicles, power loss to the transmitter, or other problems associated with trackside transmitters.
G2X Pro GPS track maps are created from plotted vehicle location, thus eliminating positional errors that are inherent to inertia based systems. G2X Pro GPS track mapping is capable of easily producing accurate track maps from courses that combine highly bank and extremely flat areas (such as the road course at Daytona), along with standard closed course race tracks. In addition, the G2X Pro can create open course track maps, such as would be used in auto cross, hill climbing and other events where the start and finish are located at two different locations.