I live in Nagano pref. in Japan.The1998 Winter Olympic games were held in Nagano.
I think ,Skiing is a sport of self-gratification,that is the origin of fun.
But I can’t get out of my Ski Turn habit.   For 5 years , I  tryed  to see my turn objectively.
I had tryed to measure  using  MEMS Accelerometers ,I couldn’t get any Ski Turn parameters  due to  vivbration noise and Integration error.
 2019 Dec. I was lucky to find  the ArduSimple’s SimpleRTK2B heading kit.

1:Purpose of the system

A. Quantification of Ski turn Skidding
B. RL Ski  parameter (headSpeed,headAngle,longtitude,latitude,height,ski Slope)
C.  Time accuracy(Sampling period,RL Ski RTK Synchronizing)
D.Easy for everyone to use ,easy to understand,
E.Analyzed Results  see soon after ski run

2:Ski Turn Analyzer [STA] description

2-1:System Outline
GNSS board:          Ardusimple SimpleRTK2B Headingkit x2
Microcomputer:     M5StickCx2,M5Atom-TFx2 (Arduino IDE Programming)
    F9P setting:            SimpleRTK2B master configuration file Movingbase setting   rate 8Hz  ourput NAV-PVT,NAV-RELPOSNED
RTK:                        Softbank ALES NTRIP service(3300 stations in japan) https//www.softbank.jp/biz/iot/service/ichimill
   

2-2:Ski Antenna setting

※　I improve  Rover antenna position  farther back for avoid covering of  telemark sikiing form.

2-5:On Skiing Mount
Above system  worn on skier chest.

Mouting View   link ti YOUTUBE

2-4:Data Analysys
I am still improving  programs. Latest rev 016 is below

Above Analysys Movie  to YOUTUBE link

2-5 STA  Algorithm under development
 A ski Run  Estimation  to compare with your own senses
Speed and  Turn Arc and  range of Motion Angle and Skidding Angle

      example below graph
A:  Speed(pink) not controled
B:  Motion-HeadAngle  range   decreasing
C:  Skid Angle range decreasing

A,B,C  Ranege Shape  Depends on the skier’s sence.

-STA will visualize your skiing image ,record your fired run  objective.