GPS-IMU-SF-comparison

data set for 12 horses (column 1), 3 runs each (column 2: 1 inside lane, 2 middle lane, 3 outside lane)), at target speed of 16.1m/s (36 miles per hour). Data set containing 61 samples per run including:

-stride frequency extracted from GPS speed fluctuations collected with a 10 Hz GPS logger (SF GPS), Vbox sport, 2022 version

-stride frequency extracted from a IMU data logger (Xsens DOT 2nd generation) logging at 120 Hz and configured for 'dynamic' settings, (SF IMU). SF IMU data downsampled to match SF GPS data.

-synchronization fo GPS and IMU data via root mean square error calculation of GPS and IMU heading (yaw) values.

-average value of SF GPS and SF IMU

-difference between SF GPS and SF IMU

-average and difference for Bland and Altman analysis of method agreement.

in addition to the GPS and IMU SF data, a MATLAB script is provided (findSFfromGPSspeed.m) that can be used to extract SF values from GPS speed values (sampled at 10 Hz). AN example file containing GPS speed (Horse12-Speed.csv) is also given for that purpose.