title: A new time measurement method using a high-end global navigation satellite system to analyze alpine skiing.
abstract: Accurate time measurement is essential to temporal analysis in sport. This study aimed to (a) develop a new method for time computation from surveyed trajectories using a high-end global navigation satellite system (GNSS), (b) validate its precision by comparing GNSS with photocells, and (c) examine whether gate-to-gate times can provide more detailed information about alpine skiing performance. The results demonstrated small mean time differences with no systematic bias, with a velocity dependent scatter of time differences, which diminished at higher velocities. Furthermore, the multiple gate-to-gate and lag times demonstrated that the GNSS enabled a more detailed analysis compared to photocells. The measurements using GNSS showed high validity and potential as a tool for more specific analysis of performance in skiing.
authors.affiliation: Department of Biomechanics, University of Ljubljana.
authors.forename: Matej
authors.initials: M
authors.lastname: Supej
authors.forename: Hans-Christer
authors.initials: HC
authors.lastname: Holmberg
mesh_terms: D000328:Adult; D054874:Athletic Performance; D005260:Female; D040362:Geographic Information Systems; D006801:Humans; D016014:Linear Models; D008297:Male; D055641:Mathematical Concepts; D012420:Running; D017215:Satellite Communications; D012865:Skiing; D055815:Young Adult