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R. Steven Nerem Professor Associate Director of Colorado Center for Astrodynamics Research (CCAR) Aerospace Engineering Sciences University of Colorado Boulder, CO 80309-0431 (303) 492-6721 nerem@colorado.edu

Focus Area
Astrodynamics & Satellite Navigation

Education
Ph.D., Aerospace Engineering, The University of Texas at Austin, 1989
M.S., Aerospace Engineering, The University of Texas at Austin, 1985
B.S., Geology, Colorado State University, 1982

Professional Experience
2002-present, Associate Director of Colorado Center for Astrodynamics Research (CCAR), University of Colorado at Boulder
2000-present, Associate Professor, Aerospace Engineering Sciences, University of Colorado
1999-2000, Associate Professor, Dept. of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin
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

Awards (selected)
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.

Research Interests
Satellite altimetry, sea level change, Earth gravity field determination, time variations of the Earth's gravity field, planetary geodesy, precision orbit determination, astrodynamics.

Publications (selected)
Chambers, D. P., T. J. Urban, D. Fujii, C. A. Mehlhaff, and R. S. Nerem, Low Frequency Variations in Global Mean Sea Level: 1950-2000, J. Geophys. Res., Vol. 107, No. C4, pp. 1-10, 2002.
Nerem, R. S., and G. T. Mitchum, “Estimates of vertical crustal motion derived from differences of TOPEX/POSEIDON and tide gauge sea level measurements”, Geophys. Res. Lett., 29(19), 1934, doi:10.1029/2002GL015037, 2002.
Chambers, D. P. C. A. Mehlhaff, T. J. Urban, and R. S. Nerem, Analysis of interannual and low-frequency variability in global mean sea level from altimetry and tide gauges, Phys. Chem. Earth, Vol. 27, pp.1407-1411, 2002.
Gabor, M. J., and R. S. Nerem, “Satellite-Satellite Single Difference Phase Bias Calibration As Applied to Ambiguity Resolution”, Navigation, Vol. 49, No. 4, pp. 223-242, 2003.
Bender, P. L., R. S. Nerem, and J. M. Wahr, Possible Future Use of Laser Gravity Gradiometers, Space Sci. Rev., Vol. 108, No. 1, pp. 385-392, 2003.
Nerem, R. S., J. M. Wahr, and E. W. Leuliette, Measuring the Distribution of Ocean Mass Using GRACE, Space Sci. Rev., Vol. 108, No. 1, pp. 331-344, 2003.
Gabor, M. J., and R. S. Nerem, Characteristics of Satellite-Satellite Single Difference Widelane Fractional Carrier Phase Biases, Navigation, Vol. 51, No. 1, pp. 77-92, 2004.
Park, K. D., R. S. Nerem, M. S. Schenewerk, and J. L. Davis, Site-Specific Multipath Characteristics of Global IGS and CORS GPS Sites, J. Geodesy, Vol. 77, No. 12, pp. 799-803, DOI 10.1007/s00190-003-0359-9, 2004.
Cazenave, A., and R. S. Nerem, Present-Day Sea Level Change: Observations and Causes, Rev. Geophys., 42, RG3001, doi:10.1029/2003RG000139, 2004.
Leuliette, E. W., R. S. Nerem, and G. T. Mitchum, Results of TOPEX/Poseidon and Jason calibration to Construct a Continuous Record of Mean Sea Level, Marine Geodesy, Vol. 27, No. 1-2, pp. 79-94, 2004.
Chambers, D. P., J. Wahr, and R. S. Nerem, Preliminary observations of global ocean mass variations with GRACE, Geophys. Res. Lett., 31, L13310, doi:10.1029/2004GL020461, 2004.
Yoon, Y. T., R. S. Nerem, M. M. Watkins, B. J. Haines, and G. L. Kruizinga, The Effects of GPS Carrier Phase Ambiguity Resolution on Jason-1, Marine Geodesy, Vol. 27, No. 3-4, 2004.
Lombard, A., A. Cazenave, K. DoMinh, C. Cabanes, and R. S. Nerem, Thermosteric sea level rise for the past 50 years: comparison with tide gauges and inference on water mass contribution, Global and Planetary Change, Vol. 48, No. 4, pp. 303-312, 2005.
Sutton, E. K., J. M. Forbes, and R. S. Nerem, Global thermospheric neutral density and wind response to the severe 2003 geomagnetic storms from CHAMP accelerometer data, J. Geophys. Res., 110, A09S40, doi:10.1029/2004JA010985, 2005.
Forbes, J. M., G. Lu, S. Bruinsma, R. S. Nerem, and X. Zhang, Thermosphere density variations due to the 15-24 April 2002 solar events from CHAMP/STAR accelerometer measurements, J. Geophys. Res., 110, A12S27, doi:10.1029/2004JA010856, 2005.
Luthcke, S. B., H. J. Zwally, W. Abdalati, D. D. Rowlands, R. D. Ray, R. S. Nerem, F. G. Lemoine, J. J. McCarthy, and D. S. Chinn, Recent Greenland Ice-Sheet Mass Loss Derived from High-Resolution Analysis of Gravity Observations, Science, 314, 1286-1289, 2006.
Bruinsma S., J. M. Forbes, R. S. Nerem, X. Zhang, Thermosphere density response to the 20–21 November 2003 solar and geomagnetic storm from CHAMP and GRACE accelerometer data, J. Geophys. Res., 111, A06303, doi:10.1029/2005JA011284, 2006.
Nerem, R. S., A. Cazenave, D. P. Chambers, L. Fu, E. W. Leuliette, G. T. Mitchum, Comment on “Estimating future sea level change from past records” by Nils-Axel Mörner, Global and Planetary Change, 55, 358-360, 2006.
Sutton E. K., J. M. Forbes, R. S. Nerem, T. N. Woods, Neutral density response to the solar flares of October and November, 2003, Geophys. Res. Lett., 33, L22101, doi:10.1029/2006GL027737, 2006.
Nerem, R. S., E. Leuliette, and A. Cazenave, Present-day sea-level change: A review. Comptes Rendus Geoscience, 338, 1077-1083, 2006.

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