An unmanned Delta 2 rocket lifted off from California on Saturday carrying a NASA satellite to measure moisture in the top layer of the Earth's soil, data to be used in weather-forecasting and tracking of global climate change.
Soil moisture is a variable that binds together all of the planet's environmental systems, scientists say. More precise data will enable forecasters and policy-makers to deal more effectively with drought or flooding in specific regions. "It's the metabolism of the system," said Dara Entekhabi, lead scientist of NASA's Soil Moisture Active Passive (SMAP) observatory.