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Europe’s gravity-surveying ‘Ferrari’ satellite plummeting to Earth likely incinerated - officials

Published time: November 10, 2013 11:02
Edited time: November 11, 2013 10:26
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A satellite that mapped the Earth’s gravity for four years likely burned up as it re-entered the atmosphere on Sunday. The device had completed its mission before starting it uncontrolled descent.

ReutersAbout a quarter of the 1.2-ton GOCE satellite could have survived the re-entry, with debris most likely falling into the ocean, European Space Agency officials said.

"By the time you read this, the spacecraft's amazing flight will, most likely, have come to an end," space agency spokesman Daniel Scuka wrote in a post, Reuters reports. There’s no information yet about where any debris could have fallen.

Earlier the European Space Agency (ESA) said that contact with GOCE was established from “the Troll station in Antarctica at 23:42 CET. The central computer temperature is at 80ºC and the battery is at 84ºC. At an altitude of less than 120 km (74.5 miles), the spacecraft is – against expectations – still functional.”

With the xenon gas for the motors expired, scientists at the European Space Agency had literally no way of steering the vessel, so they were relying on good luck for the re-entry to go smoothly without causing any damage on Earth.

It was 25 years ago that the ESA last attempted such a free-fall, during the Isee-2 magnetosphere mission.

The space agency’s one-ton Gravity field and steady-state Ocean Circulation Explorer, or GOCE, was launched from Plesetsk, in northern Russia, in 2009.

Having spent 2 1/2 more years on its mission than originally planned, it was taken to extremely low orbits with the aim of providing gravity data of unparalleled accuracy.

“This innovative mission has been a challenge for the entire team involved: from building the first gradiometer for space to maintaining such a low orbit in constant free-fall, to lowering the orbit even further,” said Volker Liebig, ESA’s director of Earth observation programs. “The outcome is fantastic. We have obtained the most accurate gravity data ever available to scientists. This alone proves that GOCE was worth the effort – and new scientific results are emerging constantly.”

The $466 million satellite’s sleek aerodynamic design led to it being nicknamed the “Ferrari of space.”

In late October, the satellite’s supply of xenon gas ran out; however, for two more weeks the satellite continued its orbit until its engines died and it started the inevitable fall to Earth.

The problem scientists are faced with now is, despite knowing that most of GOCE will burn up in Earth’s atmosphere, around 50 fragments of debris weighing in at about 275 kilograms will slip past it. This means they could end up falling literally anywhere.

The lack of knowledge is caused by constant changes in the Earth’s upper atmosphere, which are influenced by solar activity.

An international campaign involving the Inter-Agency Space Debris Coordination Committee is monitoring the situation continuously, the ESA said, promising to “keep the relevant authorities permanently updated.”

Scientists at NASA estimate that an average of one piece of falling space debris daily survives the Earth’s atmosphere. They are confident that the chances of debris causing serious damage are small, as the record of even property damage has been almost negligible in the last half-century.

That assumption is based on the simple fact that two-thirds of the planet is covered in water, and that most of the Earth’s land masses are quite sparsely populated.

Russian, American and German satellites have fallen in the past, often in circumstances involving the failure of an engine at very low orbits. Though no substantial damage was ever reported, debris as heavy as 160-400 kilograms had previously fallen within hundreds of kilometers of populated areas in the Pacific.

Comments (15)


Mohamed Hashim 11.11.2013 07:00

'Edhdhuvahaku ma fataahakaa kulhenikon eythi govee athah! lol. ... Golayaku bunee "neseebehnu satellite akaa nukulhunukan!" LOL!' [Maldivian language]

[ translation]
One day I was playing with a fire craker & it exploded in my hand! lol. ... A guy said "It's lucky that you weren't playing with a satellite!" LOL!


Da No 11.11.2013 05:52

No one knows what the fate of this thing was coz no one was looking. Except for us the ones whos houses it could've fell on. It became a liability as soon as it ran out of fuel and would've been a further liability to track it to make sure it did infact break up or land in the ocean. Forget about safe retrieval and or tracking for a safe touch down..coz hey the ocean is a rubbish tip any way and what corporate/government clown birgade is going to waste money on tracking a safe crash landing and picking up the pieces?


gera toutoune 11.11.2013 03:10

if it drops on my roof. I ould hve the esa pay me $1 billion.

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