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- Title ASCAT deployment
- Released 21/06/2006 10:28 am
- Copyright ESA - AOES Medialab
Once MetOp is in its polar orbit 800 kilometres above the surface of the Earth and the solar panels are in position, the Advanced Scatterometer (ASCAT) two three-metre long antenna arms are gently deployed into a fixed V-shaped position at +135° and -135° with respect to the spacecraft flight direction. Each of the antenna arms provides the fore-beam of one swath and the aft-beam of the other. ASCAT uses radar to measure electromagnetic backscatter from the wind-roughened ocean surface, from which data on wind speed and direction can be derived.