Amazing GRACE – Groundwater from Space and the Future of Hydrometry

Gravity Recovery and Climate Experiment Mission (GRACE) data is being streamed to Time Square in New York City until April 22nd in honor of World Water Day. If you haven’t heard about GRACE, you should check it out http://www.csr.utexas.edu/grace/. The earth is a closed system so when water leaves one region it will appear somewhere else.  The twin GRACE satellites, which have been in a paired orbit for 10 years, measure their distance relative to each other using laser beams. This distance changes as the satellites pass over anomalies in the mass of the earth, allowing for the mapping of … Read More