A pair of experimental twin satellites called the Gravity Recovery And Climate Experiment, or "GRACE", were launched in March 2002. Since then they have been collecting gravity measurements which scientists use to derive Terrestrial Water Storage Anomalies (TWSA). TWSA can then be used as an indicator for drought and flood conditions across the globe. For more information on the GRACE mission please visit http://ift.tt/1z7Hogm
from NASA's Scientific Visualization Studio: Most Recent Items http://ift.tt/1POFz2m
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