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Alfriend, K. Terry

TEES Research Chair Professor
Aerospace Engineering
Texas A&M University
Phone: 
(831) 648-1772
Fax: 
(979) 845-6051

Research Interests: 

Astrodynamics, Satellite Attitude Dynamics and Control, Space Debris, Space Situational Awareness, Space Systems Engineering

Education: 
  • PhD - Va. Tech., Engineering Mechanics 1967
  • MS - Stanford University - Engineering Mechanics 1964
  • BS - Va. Tech. - Engineering Mechanics 1962
Honors and Awards: 
  • 2010 - Kyle T. Alfriend Astrodynamics Symposium
  • 2008 - Von Karman Lecture, 2008 Israel Aerospace Sciences Conference
  • 2005 - AAAS International Scientific Cooperation Award
  • 1999 - Elected to the National Academy of Engineering
  • 1998 - AIAA Mechanics and Control of Flight Award
  • 1989 - AAS Dirk Brouwer Award
  • 1988 - Elected Fellow, AIAA
  • 2005 - Appointed to the Air Force Institute of Technology Board of Visitors
  • 2004 - Appointed to the USAF Air University Board of Visitors
  • 2004 - Best Paper Award, AAS/AIAA Space Flight Mechanics Conference, Feb. 2004
  • 2004 - Chair, AAS Space Flight Mechanics TC, 2004-2005
  • 2003 - Elected charter member of the Texas Academy of Science, Engineering and Medicine
  • 2002 - Keynote Speaker, Nonlinear Problems in Aviation and Aerospace
  • 2001 - Best Paper Award, AAS/AIAA Space Flight Mechanics Conference, Feb. 2001
  • 2000 - Appointed the Wisenbaker II Chair Professor of Aerospace Engineering
  • 2000 - Keynote Lecture US-European Workshop on Celestial Mechanics, Posnan, Poland, July 3-7, 2000
  • 2000 - Keynote Speaker, 1st International Conference on Astronautics and Aeronautics, Harbin, China, June 6-9, 2000.
  • 1998 - Elected member of the International Academy of Astronautics
  • 1998 - Keynote Speaker, 1998 Nonlinear Problems in Aviation and Aerospace Conference
  • 1998 - Appointed Associate Editor, International Journal of Celestial Mechanics and Dynamical Astronomy, 1998-
  • 1997 - Member of NAS/NRC Panel for Space Shuttle Operations With Respect to Space Debris
  • 1991 - Appointed Editor-in-Chief of the AIAA J. of Guidance, Control and Dynamics, 1991-1995
  • 1990 - Chair, AIAA Astrodynamics TC, 1990-1992
  • 1985 - Elected Fellow, AAS
  • 1985 - Appointed Editor-in-Chief of the AAS J. of the Astronautical Sciences, 1985-1988
  • 1984 - Elected Associate Fellow, AIAA
  • 1983 - Appointed Associate Editor of the AAS J. of the Astronautical Sciences, 1983-1985
  • 1981 - Navy Meritorious Civilian Service Award
  • 1981 - Editorial Board of the Int. J. of Celestial Mechanics, 1981-1986
  • 1980 - Appointed Associate Editor of the AIAA J. of Guidance, Control and Dynamics, 1980-1982
  • 1978 - NRL Best Paper Award
  • 1973 - NRC/NAS Senior Postdoctoral Resident Research Associateship
  • 1970 - NASA/ASEE Summer Faculty Fellowship
Selected Publications: 
  • Roscoe, C.W.T., Vadali, S.R, and Alfriend, K.T., “Design of Satellite Formation in Orbits of High Eccentricity With Performance Constraints Over a Region of Interest,” AAS J. of the Astronautical Sciences, Vol. 59, Nos. 1 & 2, Jan-June 2012, pp. 145-164
  • Khutorovsky, Z.N., Samotokhin, A.S. and Alfriend, K.T., “Guaranteed Approach For Orbit Determination With Limited Error Measurements,” AIAA J. of Guidance, Control and Dynamics, Vol. 36, No. 4, July-Aug 2013, pp. 1186-1195
  • Hill, K., Sabol, C. and Alfriend, K.T., “Nonlinear Effects in the Correlation of Tracks and Covariance Propagation”, Acta Astronautica, Vol. 84, 2013, pp.69-80
  • Breger, L., How, J. and Alfriend, K.T., "Partial J2 Invariance for Spacecraft Formations", Paper No. AIAA 2006-6585, AIAA/AAS Astrodynamics Conference, Keystone, CO, Aug. 2006
  • Fujimoto, K., Scheeres, D.J. and Alfriend, K.T., “Analytical Nonlinear Propagation of Uncertainty in the Two-Body Problem,” AIAA J. of Guidance, Control and Dynamics, Vol. 35, No. 2, March-April 2012, pp. 497-509
  • Alfriend, K.T., Lee, D-J. and Creamer, N.G., "Optimal Servicing of Geosynchronous Satellites", to AIAA J. of Guidance, Control and Dynamics, Vol. 29, No. 1, Jan-Feb. 2006, pp. 203-206.
  • Vadali, S.R., Sengupta, P., Yan, H. and Alfriend, K.T., “Fundamental Frequencies of Satellite Relative Motion and Control of Formations,” AIAA J. of Guidance, Control and Dynamics, Sept-Oct 2008, pp. 1239-1248
  • Lee, D.-J. and Alfriend, K.T., “Sigma Point Filtering for Efficient Orbit Estimation,” AIAA J. of Spacecraft and Rockets. Vol. 44, No. 2, March-April 2007, pp. 388-398
  • Alfriend, K.T. and Yan, H., "An Evaluation and Comparison of Relative Motion Theories", AIAA J. of Guidance, Control and Dynamics, Vol. 26, No. 2, March-April-2005, pp. 254-263.
  • Yurasov, V., Nazarenko, A., Cefola, P. and Alfriend, K.T., "Density Corrections For the NRLMSIS-00 Atmosphere Model", AAS 05-168, 2005 AAS/AIAA Space Flight Mechanics Conference, Copper Mountain, CO, Jan. 2005.
  • Yan, H., Alfriend, K.T., and Ross, I. M., "Three-Axis Magnetic Attitude Control Using Pseudospectral Control Law", Paper No. AAS 05-417, 2005 AAS/AIAA Astrodynamics Conference, Lake Tahoe, CA, Aug. 7-11, 2005.
  • How, J.P., Breger, L., Megan, M., Alfriend, K.T. and Carpenter, J.R., “Differential Semi-Major Axis Estimation Performance Using Carrier-Phase Differential GPS Measurements, AIAA J. of Guidance, Control and Dynamics, Vol. 30, No. 2, March-April 2007, pp. 301-313
  • Alfriend, K.T. and Lee, D-J., "Nonlinear Bayesian Filtering For Orbit Determination and Prediction", 6th US Russian Space Surveillance Workshop, St. Petersburg, Russia, 22-26 August 2005.
  • Alfriend, K.T., Lee, D-J. and Creamer, N.G., ”Optimal Servicing of Geosynchronous Satellites,”  AIAA J. of Guidance, Control and Dynamics, Vol. 29, No. 1, Jan-Feb. 2006, pp. 203-206
  • Sabol, C., Luu, K.K., and Alfriend, K.T., "High Accuracy Orbit Updates Using Angles-Only Data", Paper No. AAS 04-198, 2004 AAS/AIAA Space Flight Mechanics Conference, Wailea, HI, Feb. 2004.
  • Lee, D-J., Alfriend, K.T., "Adaptive Sigma Point Filtering For State and Parameter Estimation", Paper No AIAA 2004-5101, 2004 AIAA/AAS Astrodynamics Conference, Providence, RI, Aug. 2004.
  • Yurasov, V., Nazarenko, A., Cefola, P. and Alfriend, K.T., “Results and Issues of Atmospheric Density Correction,” AAS J. of the Astronautical Sciences, Vol. 52, No. 3, July-Sept. 2004, pp. 281-300
  • Gim, D-W and Alfriend, K.T., “The State Transition Matrix of Relative Motion for the Perturbed Non-Circular Reference Orbit,” AIAA J. of Guidance, Control and Dynamics, Vol. 26, No. 6 Nov-Dec 2003, pp 956-971
  • Vadali, S.R., Vaddi, S.S. and Alfriend, K.T., "An Intelligent Control Concept for Formation Flying Satellite Constellations," Int. Journal of Robust and Nonlinear Control, Vol. 12, 2002, pp. 97-115
  • Alfriend, K.T. and Lovell, T.A., "Error Analysis of Satellite Formations In Near Circular Low Earth Orbits", Paper No. AAS 03-651, 2003 AAS/AIAA Astrodynamics Conference, Big Sky, MT, Aug. 2003.
  • Schaub, H. and Alfriend, K.T., “J2 Invariant Orbits for Spacecraft Formations,” Celestial Mechanics and Dynamical Astronomy, Vol. 79, 2001, pp. 77-95
  • Schaub, H. and Alfriend, K.T., “Impulsive Feedback Control To Establish Specific Mean Elements of Spacecraft Formations,“ Journal of Guidance, Control and Dynamics, Vol. 24, No. 4, pp. 739-745
  • Akella, M.R. and Alfriend, K.T., “The Probability of Collision Between Space Objects”, AIAA Journal of Guidance, Control and Dynamics, Vol. 23, No. 5, pp. 769-772, September 2000March 2000, pgs 69-87
  • Alfriend, K.T. and Coffey, S.L., "Elimination of the Perigee in the Artificial Satellite Problem," Celestial Mechanics, Vol. 7, 1983.