What Is A Geoid – And The Goce?
This amazing map shows earth’s gravity pull at surface and oceanic levels. Called a geoid, the map shows where gravity is level, up and down on our planet. Earth’s geoid, a concept first described by 19th century German mathematician Carl Friedrich Gauss, is a visualization of what the idealized planetary surface would look like if the force of gravity was everywhere perpendicular – like in a global ocean without tides and currents
Cool colors (blue – green) show lower pull of gravity and hot colors (orange – red) show greater effects of gravity. The map was created from data captured by Europe’s Goce satellite, which is in very low earth orbit. Launched in 2009, Goce has the lowest orbit of any research satellite in operation today. Goce has three platinum blocks inside its gradiometer instrument that sense accelerations as small as 1 part in 10,000,000,000,000 of the gravity experienced on earth.