Although they are not particularly like the comparison, scientists from the GOCE satellite team had to admit that new data shows the Earth of gravity field - or geoid - makes our planet a rotating potatoes look. After two years in orbit, ESA has a sleek and sexy GOCE satellite (gravity field and steady-state ocean circulation Explorer) sufficient data map collected gravity with unprecedented accuracy. While certainly not look has our world like a spinning bulb, this exaggerated view shows the most accurate model of the gravity on the planet as varies.
The geoid is nothing more than how the oceans would vary, there are no other forces besides gravity, on our planet.
"We have a homogeneous shot, a boring shot, it would", said scientist Roland pail at the Technical University of Munich, at the press briefing today speak GOCE. "But because of rotation, you might get a flattening of the Earth and we have topography such as mountains and irregular distribution of mass in the Earth's interior." "What we show here in General, is the gravity field of deviations due to inhomogeneous mass distribution on the Earth and the earth interior."
In this picture of GOCE gravity is strongest in yellow areas; It is most vulnerable in the blue. Credit: ESAWhile satellite which operated gravity recovery and climate experiment (GRACE) for 8 years, have been a previous gravity the most new data from the GOCE in about 14 months collected and it States where no data before.
GOCE can sense small variations in the pull of gravity on the Earth, and the data is to create an idealized surface bumps which traces gravity Crest care and is the form that take the oceans without wind, currents WürdeEarth rotation and other forces.
By comparison the sea level and geoid data, GOCE data on ocean currents and circulation, sea level change, ice dynamics revealed is, said Rory Bingham, of the University of Newcastle, which to understand heat transport and climate change.
But also of interest changing tectonic plates in earthquakes and magma is movements under volcanoes as GOCE data. Scientists search for the earthquake in Japan closely, how the data should show a three-dimensional look to what in the Interior of the Earth was going on. Although the movement can be observed directly from the space, you create a earthquake signature in gravity data that could be used to understand the processes to these natural disasters and to help them predict.
"Even if this Quake by large movements in the Earth, are on the height of the satellite the signals very small." But we should always still seem them in the data, "said Dr. John Bouman of the German geodetic Research Institute."
GOCE in orbit. Credit: ESA"GOCE us dynamic topography and traffic patterns of the oceans with unprecedented quality and resolution, will be," said Professor Reiner Rummel, former head of the Institute for astronomical and physical geodesy at the Technical University of Munich. "I am confident that these results will be to improve our understanding of the dynamics of the world oceans."
"You could say that to its early conception of GOCE more like science fiction, was," said Volker Liebig, Director of ESA Earth observation programme. "GOCE has now clearly shown that it is a State-of-the-art mission."
Sources: GOCE press ESA press release briefing,
Tagged as: Earth observation satellites, GOCE,.
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