GOCE gravity satellite has plenty of fuel to keep flying

Europe's GOCE satellite is collecting exquisite data on Earth's uneven gravity field and has enough xenon fuel to maintain its low-altitude orbit for continued operations through 2013, according to the mission's project manager. The European Space Agency released last week a sneak peek of Earth's gravity field in a lumpy spherical representation called a geoid, a three-dimensional map of the planet's surface and oceans if tides and currents did not exist. More

(Source: Space Flight Now - Apr 5)