27 novembre 2012 0 Commentaire


From its vantage point 1336 kilometers (830 miles) above the Earth, the
US/European Jason-1 and OSTM/Jason-2 ocean altimeter satellites measure the
height of the ocean surface directly underneath the satellite with an accuracy
of 4-5 centimeters (better than 2 inches). Traveling in excess of 7 kilometers
(4 miles) every second as they trace out an orbit, the spacecraft cover the
global oceans every 10 days (the « repeat period » of the satellite orbit).

For More See: http://sealevel.jpl.nasa.gov/technology/


NASA  Aqua dans Articles p38232-300x242


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