Forma, Vol. 19 (No. 2), pp. 121-130, 2004

Fluctuation of a Mountaineer's Speed

Yoshihiro Yamaguchi

Department of Information Systems, Teikyo Heisei University, Ichihara, Chiba 290-0193, Japan
E-mail address:

(Received July 22, 2004; Accepted September 14, 2004)

Keywords: Mountaineering, Global Positioning System, Autocorrelation Function, Fractal, f(a)-spectrum

Abstract. Using a portable navigator for Global Positioning System, the position and the altitude of a mountaineer hiking in the area of Tanzawa-Oyama Quasi-National Park are measured. The time series of average speed of a mountaineer is obtained. Fluctuation of average speed is analyzed in terms of autocorrelation function and f(a)-spectrum. It depends on a style of mountaineering.

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