The Envisat environmental satellite successfully reaches an orbit 800 kilometers (500 mi) above the Earth on its 11th launch, carrying the heaviest payload to date at 8500 kilograms (8.5 tons).
Envisat ("Environmental Satellite") is a large inactive Earth-observing satellite which is still in orbit and now considered a space debris. Operated by the European Space Agency (ESA), it was the world's largest civilian Earth observation satellite.It was launched on 1 March 2002 aboard an Ariane 5 from the Guyana Space Centre in Kourou, French Guiana, into a Sun synchronous polar orbit at an altitude of 790 ± 10 km. It orbits the Earth in about 101 minutes, with a repeat cycle of 35 days. After losing contact with the satellite on 8 April 2012, ESA formally announced the end of Envisat's mission on 9 May 2012.Envisat cost 2.3 billion Euro (including 300 million Euro for 5 years of operations) to develop and launch. The mission has been replaced by the Sentinel series of satellites. The first of these, Sentinel 1, has taken over the radar duties of Envisat since its launch in 2014.