ENVISAT declared dead in space

ESA declares end of mission for Envisat From the European Space Agency: PR 15 2012 – Just weeks after celebrating its tenth year in orbit, communication with the Envisat satellite was suddenly lost on 8 April. Following rigorous attempts to re-establish contact and the investigation of failure scenarios, the end of the mission is being…

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Crippled ENVISAT imaged in orbit, still incommunicado

From the European Space Agency: Investigation on Envisat continues Optical, radar and laser observations of the Envisat satellite show that it is still in a stable orbit. Efforts to regain contact with the satellite have been under way since 8 April, when it unexpectedly stopped sending data to Earth. To determine if Envisat has entered…

Envisat’s satellite failure launches mysteries

I’ve been watching with interest and concern some of Steve Goddard’s postings on Envisat on the abrupt changes in their recent sea level data. To me, something didn’t seem quite right, and I expressed concerns privately along those lines that I didn’t know the causes of what appear to be recent unexplained “adjustments” in the…

More crack in the Antarctic

From the European Space Agency (ESA): Satellite observes rapid ice shelf disintegration in Antarctic 5 April 2012 As ESA’s Envisat satellite marks ten years in orbit, it continues to observe the rapid retreat of one of Antarctica’s ice shelves due to climate warming. One of the satellite’s first observations following its launch on 1 March…