About Gravity Recovery and Climate Experiment (GRACE)
Gravity Recovery and Climate Experiment (GRACE)- GRACE will be able to map the Earth's gravity fields by making accurate measurements of the distance between two satellites, using GPS and a microwave ranging system. It will provide scientists with a way to map the Earth's gravity fields. The results from this mission will yield information about the distribution and flow of mass within the Earth and its oceans and surroundings.