C'est parti pour un bon coup de tabac, les radiosondes sont emportées par le JET STREAM qui passe au dessus des iles britaniques mais déborde sur une bonne partie du Nord de la France:
1 111110 0Z H18 47.528232 3.549406 COULANGES SUR YONNE
2 111110 12Z H30 48.156229 4.683891 SUD BAR SUR AUBE
3 121110 0Z H42 48.046750 5.7514217 LA MARCHE
4 121110 12Z H54 48.343333 5.292035
Définitions :
- 1 international knot =
- 1 nautical mile per hour (by definition),
- 1.852 kilometres per hour (exactly),
- 0.514 metres per second,
- 1.151 miles per hour (approximately).
The U.S. adopted the international definition in 1954, having previously used the U.S. nautical mile (1,853.248 m). The U.K. adopted the international nautical mile definition in 1970,
having previously used the U.K. Admiralty nautical mile (6,080 ft [1,853.184 m]).
The speeds of vessels relative to the fluids in which they travel (boat speeds and air speeds)
are measured in knots. For consistency, the speeds of navigational fluids (tidal streams,
river currents and wind speeds) are also measured in knots. Thus, speed over the ground (SOG)
(Ground speed (GS) in aircraft) and rate of progress towards a distant point
("velocity made good", VMG) are also given in knots.
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