1. Bureau of Economic Geology, Jackson School of Geosciences, University of Texas at Austin; Austin Texas USA
2. U.S. Geological Survey, Arizona Water Science Center; Tucson Arizona USA
3. Center for Space Research, University of Texas at Austin; Austin Texas USA
4. Department of Hydraulic Engineering; Tsinghua University; Beijing China
5. U.S. Geological Survey, Kansas Water Science Center; Lawrence Kansas USA
6. Arizona Department of Water Resources; Phoenix Arizona USA
7. USDOC - NOAA - National Geodetic Survey, Table Mountain Geophysical Observatory; Boulder Colorado USA