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Differences in distance-out-of-GPS-data between Phyphox versions?
I use Phyphox for (slow) running only. The iphone tracks the GPS data, afterwards Excel converts the data.
Before the last update the calculated distance was about 30% less than in the actual version. The calculated speed seems to be unchanged.
I didn't find any relating information except:
"Changelog -> Änderungen für Android und iOS -> GPS-Experiment zeigt nun Entfernung vom Startpunkt"
Did the algorithm for extracting distances out of the GPS data change?
Thank you!
Cheers, Timo

If one uses the exact(?) formula from
dist = 6378.388 * PI/180 * acos(sin(lat1) * sin(lat2) + cos(lat1) * cos(lat2) * cos(lon2 - lon1))
the distance seem to be comparable to the "old" calculation.

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Differences in distance-out-of-GPS-data between Phyphox versions? - by tiki - 07-15-2019, 02:23 PM

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