Envisat: satellite facts

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ESA / Applications / Observing the Earth
Launch 1 March 2002 (CET)
Launcher Ariane 5
Launch mass 8200 kg
Payload mass (the instruments) 2050 kg
Planned mission length 5 years
Number of instruments 10
Orbit Sun synchronous,  altitude 800 km
Inclination 98 degrees
Time for one orbit 101 minutes
Cycle 35 day repeat, though many of Envisat’s instruments observe a wide swath of Earth and so observe the whole planet every few days.
Cost About 2 billion Euros
Main contributors Austria, Belgium, Canada, Denmark, France, Finland, Germany, Italy, Norway, Spain, Sweden, Switzerland, The Netherlands and the United Kingdom