Yesterday we had a quite windy (and super gusty) day here in Finland and some records were broken? I'll list here the data I have and also leave links to original files. You can then speculate if my calculations are correct.
I was on skis and had a LF Envy 2011 7m2 kite, wind was ~15-16m/s and gusts somewhere 25m/s. Data logger was a Ventus G730 and as a back up I had another logger also. I do realize that I don't own a GT31 logger so all results are more or less "valid".
First link includes filtered data from my gps, filtered means that I've taken off all accelerations over 4m/s2. Second link has been calculated with trapeze setting on and last with doppler setting. Software I used was GPSAR Pro:
http://toaster.fi/~Frk/KiteSpeed/24_3_2 ... tered.html
http://toaster.fi/~Frk/KiteSpeed/24_3_2 ... apeze.html
http://toaster.fi/~Frk/KiteSpeed/24_3_2 ... ppler.html
As far as I've understood, my device doesn't support doppler and results are too (in)accurate in that sense? From KA72 I got results http://www.ka72.com/TrackRecalc.aspx?fid=13041
which are a bit different from GPSAR calculations but still in the same line.
Original files are at: http://toaster.fi/~Frk/KiteSpeed/data/
24_3_2011.gpx file is exported from gps logger via GPSBabel and those others starting with W are from Nokia Sportstracker (+external bt gps receiver). That Sportstracker data is filtered already
in software so it's not that accurate and there no doppler support at all. There are multiple files because I have to shut down logging if wan't to see max speeds during session.
Here's also a short clip from a one "show off" http://www.youtube.com/watch?v=Pp3GKisvABc
So, how fast can we go?