heure 		lat		long		alt
10:00:00	42.5565		0.4400		200
10:00:05	42.6025		0.4455		200	
10:00:15	42.7035		0.4560		200	
10:00:20	42.7540		0.4565		150
10:00:35	42.9035		0.4580		150