View Full Version : Tracking Rainfall, Just By its Gravity

2005-Sep-10, 11:55 AM
SUMMARY: Scientists working with the Gravity Recovery and Climate Experiment (Grace) have demonstrated that they can track changes in the Earth's environment by measuring its gravity field. Launched in 2002, Grace is actually two identical spacecraft that keep track of their precise distance from each other. As they pass over the lumpy gravity field of the Earth, their distance changes, which they can measure and turn into a gravity map of the planet. The mission demonstrated that it could measure 10 cm (4 in) of rainfall in the Amazon, just from the effect of its gravity.

View full article (http://www.universetoday.com/am/publish/changing_climate_shifts_earth_gravity.html)
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