Office Location: ECNT 319
Astrodynamics & Satellite Navigation
PhD, Aerospace Engineering, The University of Texas at Austin, 1989
MS, Aerospace Engineering, The University of Texas at Austin, 1985
BS, Geology, Colorado State University, 1982
2002 - Present, Associate Director of Colorado Center for Astrodynamics Research (CCAR), University of Colorado at Boulder
2000 - Present, Professor, Aerospace Engineering Sciences, University of Colorado
1999 - 2000, Associate Professor, Dept. of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin
1996 - 1999, Assistant Professor, Dept. of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin
1989 - 1996, Geophysicist, Space Geodesy Branch, NASA/Goddard Space Flight Center
American Astronautical Society Earth Science and Applications Award, 2014
Associate Fellow of the American Institute of Aeronautics and Astronautics, 2010
Fellow of the American Geophysical Union, 2008
Geodesy Section Award, American Geophysical Union, 2006
Bowie Lecturer, American Geophysical Union, 2005
Big XII Faculty Fellowship, 1998-99
Faculty Excellence Awards Recipient, Halliburton Foundation Young Faculty Award, 1998
NASA Exceptional Scientific Achievement Medal, 1995
NASA/GSFC Performance Award (Outstanding), 1994
NASA/GSFC Certificate of Outstanding Performance, 1994
NASA Public Service Group Achievement Award (TOPEX/POSEIDON Precision Orbit Determination Team), 1994
NASA/Goddard Space Flight Center Group Achievement Award (TOPEX/Poseidon Precision Orbit Determination Team), 1994
Editors' Citation for Excellence in Refereeing for Geophysical Research Letters, 1993.
NASA/GSFC Certificate of Outstanding Performance,1993.
NASA/Goddard Space Flight Center Quality Increase Award,1993.
NASA/GSFC Special Act Group Award, Lageos II Project Team,1993.
NASA Group Achievement Award (TOPEX/Poseidon Mission Design),1993.
NASA/Goddard Space Flight Center Group Achievement Award (Lageos-2 Project Team),1993.
NASA/Goddard Space Flight Center Group Achievement Award (Joint Gravity Model 1 Team),1993.
Satellite altimetry, sea level change, Earth gravity field determination, time variations of the Earth's gravity field, planetary geodesy, precision orbit determination, astrodynamics.