The pattern you mentioned is obvious on that screen. The last menu button in the row at the bottom of the screen - "About the Drum Recorders" - lists other kinds of motion that show up on those recordings but it doesn't mention skiers. Maybe you'd need to compare winter and summer charts to find out if they create the pattern. Wind patterns might differ between seasons too. Might be interesting research to observe what happens near that drum recorder for a few days. 8-)
Mary