Quote:
Originally Posted by MikenOH
Topless
Thanks for the clarification; a question or two:
With Harry's, you use an external 1 hz GPS receiver and the software interpolation capability gives it the accuracy of a 5hz receiver? Which receiver was your brother running?
I guess my views on Harry's was colored by the guys I knew that used it running their iPhones for GPS data--good to know!
Just out of curiosity, what kind of analysis for harry's offer relative to RC?
Also, have they fixed that every other lap issue?
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My brother uses the Tom Tom mount with his iphone/Harry's which supplies a solid mount, power and a hi-res 1hz GPS receiver. Our cars run nearly identical lap times and we often compare between data loggers and our official posted transponder times. Harry's lap time/sector time accuracy is every bit as good as my 5hz w/RaceChrono. Positional accuracy mid corner is still a little better with the 5hz RC. There are now a few 5hz & 10hz receivers available for Harry's but I think they are $170ish.
The lap analysis feature with RC is a very intuitive tool where you can look at two laps running slightly different setups or strategies and compare corner entry/exit speeds with a graph and track overlay. I use this feature a lot and last I looked Harry's was not as good. HLT did just come out with a major software revision so it might be better now. Both apps are excellent learning tools once you get beyond the basics of performance driving and start chasing 1/10ths and TT championships.
More on GPS laptimer accuracy using Harry's. This is pretty consistent with what we see doing data comparisons:
http://gps-laptimer.de/GPS_and_Accuracy.html