James Longuski

James M. Longuski

1988 - Professor

Degrees

B.S.E., The University of Michigan, Aerospace Engineering - Cum laude, 1973
M.S.E., The University of Michigan, Aerospace Engineering, 1975
Ph.D., The University of Michigan, Aerospace Engineering, 1979

Contact

701 W. Stadium Ave.
West Lafayette, IN 47907-2045

Office: ARMS 3220
Office Phone: +1 765 49-45139
Email: james.m.longuski.1@purdue.edu
Webpage: https://engineering.purdue.edu/AAC

Interests

Spacecraft Dynamics
Orbit Mechanics
Control
Orbit decay and reentry

Awards and Major Appointments

NOVA (Notable Organizational Value-Added) Award from Jet Propulsion Laboratory, 1999

NASA Space Act Award, presented for creative development of a technical innovation that has been approved for publication as a NASA Tech Brief entitled, "Simple Autonomous Timing Update During Aerobraking," 2003.

Elmer F. Bruhn Award for Outstanding Teaching, 2004.

W.A. Gustafson Award for Outstanding Teaching, 2005.

Dean A.A. Potter Undergraduate Teaching Award, 2005.

Inducted into Purdue's Book of Great Teachers, August 28, 2008.

Elmer F. Bruhn Award for Outstanding Teaching, 2008.

Dean A.A. Potter Undergraduate Teaching Award, 2009.

W.A. Gustafson Award for Outstanding Teaching, 2010.

Who's Who Among America's Teachers (2002-present).

Research Areas

Current research efforts include 1) analytic theory and control of spinning-up and thrusting vehicles, 2) mission design and trajectory design for interplanetary flight, 3) orbit decay and reentry problems, and 4) tethers in space.

In 1) breakthroughs were achieved earlier at the Jet Propulsion Laboratory in the analysis of the Galileo spacecraft maneuvers. The current goal is to extend this work to a general analytic theory (which provides solutions for angular velocity, the attitude, the angular momentum vector and the translational velocity of rigid and elastic bodies subject to arbitrary body-fixed torques and forces) and to develop control laws based on the analytic theory.

In 2) mission design tools developed at the Jet Propulsion Laboratory have been acquired for research use at Purdue. Both theoretical and computational techniques are being employed to analyze the delta V gravity-assist problem in terms of identifying potential trajectories (such as the Voyager Grand Tour and the Galileo VEEGA) and optimizing the launch energy and propellant requirements for these trajectories.

In 3) analytic solutions have been obtained for the probability of immediate reentry and of orbit decay, as well as escape, in the event of misdirected interplanetary injection maneuvers occurring at low earth orbit. The solutions have relevance to safety issues involving nuclear power plants aboard deep space probes.

In 4) the feasibility of using tethers for aerobraking has been demonstrated. The basic idea is to connect an orbiter and a probe together by a long tether, for missions to planets with atmospheres. The probe enters the atmosphere and is used to reduce the hyperbolic speed of the orbiter to capture speed, thus eliminating the large retro maneuver normally required. New issues being addressed include analysis of the flexible tether, tether guidance and control, and spacecraft (endpoint) attitude control.

Publications

Gangestad, J.W., Pollock, G.E., Longuski, J.M., "Analytical Expressions that Characterize Planetary Capture with Electrostatically Charged Spacecraft," Journal of guidance, Control, and Dynamics, Vol. 34, No. 1, January-February 2011, pp. 247-258.

Pollock, G.E., Gangestad, J.W., and Longuski, J.M., "Analytical Solutions for the Relative Motion of Spacecraft with Lorentz Force Perturbations," Acta Astronautica, Vol. 68, Issues 1-2, January-February 2011, pp. 204-217.

Gangestad, J.W., Pollock, G.E., Longuski, J.M., "Lagrange’s Planetary Equations for the Motion of Electrostatically Charged Spacecraft," Celestial Mechanics and Dynamical Astronomy, Vol. 108, Issue 2, 2010, pp. 125-145.

Pollock, G.E., Gangestad, J.W., and Longuski, J.M., “Inclination Change in LEO via the geomagnetic Lorentz Force,” submitted to the Journal of Guidance, Control, and Dynamics, Vol. 33, No. 5, September-October 2010, pp. 1387-1395.

Medlock, K.L.G., and Longuski, J.M., “Aerocapture Ballutes versus Aerocapture Tethers for Exploration of the Solar System,” Journal of Spacecraft and Rockets, Vol. 47, No. 4, July-August 2010, pp. 590-596.

Pollock, G.E., Gangestad, J.W., and Longuski, J.M., “Lorentz Augmentation of Gravity-Assist Flybys with Electrostatically Charged Spacecraft,” AAS Paper No. 10-227, AAS/AIAA Space Flight Mechanics Meeting, February 14-17, 2010.

Gangestad, J.W., Pollock, G.E., and Longuski, J.M., “Lagrange’s Planetary Equations for the Motion of Electrostatically Charged Spacecraft,” AAS Paper No. 10-133, AAS/AIAA Space Flight Mechanics Meeting, February 14-17, 2010.

Pollock, G.E., Gangestad, J.W., and Longuski, J.M., “Propellantless Formation Flight via Coulomb and Lorentz Forces,” Journal of the British Interplanetary Society, Vol. 63, No. 1, January 2010, pp. 2-8

Gangestad, J.W., Pollock, G.E., Longuski, J.M., “Lagrange’s Planetary Equations for the Motion of Electrostatically Charged Spacecraft,” Celestial Mechanics and Dynamical Astronomy, Vol. 108, Issue 2, 2010, pp. 125-145.

Landau, D.F., and Longuski, J.M., "Comparative Assessment of Human-Mars-Mission Technologies and Architectures," Acta Astronautica, Vol. 65, October -November, 2009, pp. 893-991.

Gangestad, J.W., Pollock, G.E., and Longuski, J.M., :Propellantless Stationkeeping at Enceladus via the Electromagnetic Lorentz Force," Journal of Guidance, Control, and Dynamics, Vol. 32, September-October 2009, pp. 1466-1475.

Kloster, K.W., Yam, C.H., and Longuski, J.M., "Saturn Escape Options for Cassini Encore Missions," Journal of Spacecraft and Rockets, Vol. 46, July-August 2009, pp. 874-882.

Yam, C.H., Davis, D.C., Longuski, J.M., Howell, K.C., and Buffington, B., "Saturn Impact Trajectories for Cassini End-of-Mission," Journal of Spacecraft and Rockets, Vol. 46, March-April, 2009, pp. 353-364.

Ayoubi, M.A. and Longuski, J.M., "Asymptotic Theory for Thrusting, Spinning-Up Spacecraft Maneuvers," Acta Astronautica, Vol. 64, March 2009, pp. 810-831.

Ayoubi, M.A. and Longuski, J.M., "Asymptotic Theory and Limiting Cases for Spinning Spacecraft Subject to Constant Forces," Journal of Guidance, Control, and Dynamics, Vol. 31, No. 5, September-October 2008, pp. 1511-1516.

Ayoubi, M.A. and Longuski, J.M., "Analytical Solutions for Translational Motion of Spinning-Up Rigid Bodies Subject to Constant Body-Fixed Forces and Moments," Journal of Applied Mechanics, Vol. 75, No. 1, January 2008, pp. 011004-1-011004-8

Ayoubi, M.A. and Longuski, J.M., "Axial Velocity Solution for Spinning-Up Rigid Bodies Subject to Constant Forces," Journal of Guidance, Control, and Dynamics, Vol. 30, No. 6, November-December 2007, pp. 1610-1618.

Landau, D.F. and Longuski, J.M., "Human Exploration of Mars via Earth-Mars Semicyclers," Journal of Spacecraft and Rockets, Vol. 44, No. 1, January-February 2007, pp. 203-210.

Landau, D.F. and Longuski, J.M., "Guidance Strategy for Hyperbolic Rendezvous," Journal of Guidance, Control, and Dynamics, Vol. 30, No. 4, July-August 2007, pp. 1209-1213.

Landau, D.F., Longuski, J.M., and Aldrin, Buzz, "Continuous Mars Habitation with a Limited Number of Cycler Vehicles," Journal of the British Interplanetary Society, Vol. 60, No. 4, April 2007, pp. 122-128.

Landau, D.F. and Longuski, J.M., "Trajectories for Human Missions to Mars, Part II: Low-Thrust Transfers," Journal of Spacecraft and Rockets, Vol. 43, No. 5, September-October 2006, pp. 1043-1047.

Landau, D.F. and Longuski, J.M., "Trajectories for Human Missions to Mars, Part I: Impulsive Transfers," Journal of Spacecraft and Rockets, Vol. 43, No. 5, September-October 2006, pp. 1035-1042.

McConaghy, T.T., Landau, D.F., Yam, C.H., and Longuski, J.M., "Notable Two-Synodic-Period Earth-Mars Cycler," Journal of Spacecraft and Rockets, Vol. 43, No. 2, March-April 2006, pp. 456-465.

Longuski, J.M., Gick, R.A., Ayoubi, M.A., and Randall, L., "Analytical Solutions for Thrusting, Spinning Spacecraft Subject to Constant Forces," Journal of Guidance, Control, and Dynamics, Vol. 28, No. 6, November-December 2005, pp. 1301-1308.

Chen, K.J., McConaghy, T.T., Landau, D.F., Longuski, J.M., and Aldrin, B., "Powered Earth-Mars Cycler with Three-Synodic-Period Repeat Time," Journal of Spacecraft and Rockets, Vol. 42, No. 5, September-October 2005, pp. 921-927.

Jokic, M.D. and Longuski, J.M., "Artificial Gravity and Abort Scenarios via Tethers for Human Missions to Mars," Journal of Spacecraft and Rockets, Vol. 42, No. 5, September-October 2005, pp. 883-889.

McConaghy, T.T, Russell, R.P., and Longuski, J.M., "Toward a Standard Nomenclature for Earth-Mars Cycler Trajectories," Journal of Spacecraft and Rockets, Vol. 42, No. 4, July-August 2005, pp. 694-698.

Park, R.S., Scheeres, D.J., Giampieri, G., Longuski, J.M., and Fischbach, E., "Estimating Parameterized Post-Newtonian Parameters from Spacecraft Radiometric Tracking Data," Journal of Spacecraft and Rockets, Vol. 42, No. 3, May-June 2005, pp. 559-568.

Landau, D.F., Longuski, J.M., and Penzo, P.A., "Method for Parking-Orbit Reorientation for Human Missions to Mars," Journal of Spacecraft and Rockets, Vol. 42, No. 3, May-June 2005, pp. 517-522.

Jokic, M.D. and Longuski, J.M., "Design of Tether Sling for Human Transportation Systems Between Earth and Mars," Journal of Spacecraft and Rockets, Vol. 41, No. 6, November-December 2004, pp. 1010-1015.

Johnson, W.R., Longuski, J.M., and Lyons, D. T., "Six-Degree-of-Freedom Modeling of Semi-Autonomous Attitude Control During Aerobraking," Journal of Spacecraft and Rockets, Vol. 41, No. 5, September-October 2004, pp. 797-804.

Petropoulos, A.E. and Longuski, J.M., "Shaped-Based Algorithm for the Automated Design of Low-Thrust, Gravity-Assist Trajectories," Journal of Spacecraft and Rockets, Vol. 41, No. 5, September-October 2004, pp. 787-796.

McConaghy, T.T., Longuski, J.M., and Byrnes, D.V., "Analysis of a Class of Earth-Mars Cycler Trajectories," Journal of Spacecraft and Rockets, Vol. 41, No. 4, July-August 2004, pp. 622-628.

Longuski, J.M., Fischbach, E., Scheeres, D.J., Giampieri, G., and Park, R., "Deflection of Spacecraft Trajectories as a New Test of General Relativity: Determining the Parameterized Post-Newtonian Parameters ? and ?," Physical Review D, Vol. 69, February 20, 2004, pp. 42001-1-42001-15.

Johnson, W.R., Longuski, J.M., and Lyons, D.T., "Nondimensional Analysis of Reaction-Wheel Control for Aerobraking," Journal of Guidance, Control, and Dynamics, Vol. 26, No. 6, November-December 2003, pp. 861-868.

Heaton, A.F. and Longuski, J.M., "Feasibility of a Galileo-Style Tour of the Uranian Satellites," Journal of Spacecraft and Rockets, Vol. 40, No. 4, July-August 2003, pp. 591-596.

McConaghy, T.T., Debban, T.J., Petropoulos, A.E., and Longuski, J.M., "Design and Optimization of Low-Thrust Trajectories with Gravity-Assists," Journal of Spacecraft and Rockets, Vol. 40, No. 3, May-June 2003, pp. 380-387.

Johnson, W.R., Longuski, J.M., and Lyons, D.T., "Pitch Control During Auton-omous Aerobraking for Near-Term Mars Exploration," Journal of Spacecraft and Rockets, Vol. 40, No. 3, May-June 2003, pp. 371-379.

Okutsu, M. and Longuski, J.M., "Mars Free Returns via Gravity Assist from Venus," Journal of Spacecraft and Rockets, Vol. 39, No. 1, January-February 2002, pp. 31-36.

Johnson, W.R. and Longuski, J.M., "Design of Aerogravity-Assist Trajectories," Journal of Spacecraft and Rockets, Vol. 39, No. 1, January-February 2002, pp. 23-30.

Heaton, A.F., Strange, N.J., Longuski, J.M., and Bonfiglio, E.P., "Automated Design of the Europa Orbiter Tour," Journal of Spacecraft and Rockets, Vol. 39, No. 1, January-February 2002, pp. 17-22.

Strange, N.J. and Longuski, J.M., "Graphical Method for Gravity-Assist Trajectory Design," Journal of Spacecraft and Rockets, Vol. 39, No. 1, January-February 2002, pp. 9-16.

Longuski, J.M., Fischbach, E., and Scheeres, D.J., "Deflection of Spacecraft Trajectories as a New Test of General Relativity," Physical Review Letters, Vol. 86, No. 14, April 2, 2001, pp. 2942-2945.

Petropoulos, A.E., Longuski, J.M., and Bonfiglio, E.P., "Trajectories to Jupiter via Gravity Assists from Venus, Earth, and Mars," Journal of Spacecraft and Rockets, Vol. 37, No. 6, November-December 2000, pp. 776-783.

Bonfiglio, E.P., Longuski, J.M., and Vinh, N.X., "Automated Design of Aerogravity-Assist Trajectories," Journal of Spacecraft and Rockets, Vol. 37, No. 6, November-December 2000, pp. 768-775.

Gick, R.A., Williams, M.H., and Longuski, J.M., "Periodic Solutions for Spinning Asymmetric Rigid Bodies with Constant Principal-Axis Torque," Journal of Guidance, Control, and Dynamics, Vol. 23, No. 5, September-October 2000, pp. 781-788.

Javorsek II, D. and Longuski, J.M., "Velocity Pointing Errors Associated with Spinning Thrusting Spacecraft," Journal of Spacecraft and Rockets, Vol. 37, No. 3, May-June 2000, pp. 359-365.

Sims, J.A., Longuski, J.M., and Patel, M.R., "Aerogravity-Assist Trajectories to the Outer Planets and the Effect of Drag," Journal of Spacecraft and Rockets, Vol. 37, No. 1, January-February 2000, pp. 49-55.

Gick, R.A., Williams, M.H., and Longuski, J.M., "Floquet Approximation for a Nearly Axisymmetric Rigid Body with Constant Transverse Torque," Journal of Guidance, Control, and Dynamics, Vol. 22, No. 5, September-October 1999, pp. 658-663.

Tragesser, S.G. and Longuski, J.M., "Modeling Issues Concerning Motion of the Saturnian Satellites," Journal of the Astronautical Sciences, Vol. 47, Nos. 3 and 4, July-December 1999, pp. 275-294.

Longuski, J.M., Tragesser, S.G., and Puig-Suari, J., "Characterization of the Optimal Mass Problem for Aerobraking Tethers," Acta Astronautica, Vol. 44, No. 5-6, March 1999, pp. 227-241.

Tragesser, S.G. and Longuski, J.M., "Analysis and Design of the Aerobraking Tether for Stochastic Errors," Journal of Spacecraft and Rockets, Vol. 35, No. 5, September-October 1998, pp. 683-689.

Patel, M.R., Longuski, J.M., and Sims, J.A., "Mars Free Return Trajectories," Journal of Spacecraft and Rockets, Vol. 35, No. 3, May-June 1998, pp. 350-354.

Biswell, B.L., Puig-Suari, J., Longuski, J.M., and Tragesser, S.G., "Three-Dimensional Hinged-Rod Model for Elastic Aerobraking Tethers," Journal of Guidance, Control, and Dynamics, Vol. 21, No. 2, April 1998, pp. 286-295.

Sims, J.A., Longuski, J.M., and Staugler, A.J., "Trajectory Options for Low-Cost Missions to Asteroids," Acta Astronautica, Vol. 41, No. 11, December 1997, pp. 731-737.

Tragesser, S.G., Longuski, J.M., and Puig-Suari, J., "Global Minimum Mass for Aerobraking Tethers," Journal of Guidance, Control, and Dynamics, Vol. 20, No. 6, November-December 1997, pp. 1260-1262.

Sims, J.A., Staugler, A.J., and Longuski, J.M., "Trajectory Options to Pluto via Gravity Assists from Venus, Mars, and Jupiter," Journal of Spacecraft and Rockets, Vol. 34, No. 3, May-June 1997, pp. 347-353.

Beck, R.A. and Longuski, J.M., "Annihilation of Transverse Velocity Bias During Spinning-Up Maneuvers," Journal of Guidance, Control, and Dynamics, Vol. 20, No. 3, May-June 1997, pp. 416-421.

Sims, J.A., Longuski, J.M., and Staugler, A.J., "V8 Leveraging for Interplanetary Missions: Multiple-Revolution Orbit Techniques," Journal of Guidance, Control, and Dynamics, Vol. 20, No. 3, May-June 1997, pp. 409-415.

Tsiotras, P. and Longuski, J.M., "Analytic Solution of Euler’s Equations of Motion for an Asymmetric Rigid Body," Journal of Applied Mechanics, Vol. 63, No. 1, March 1996, pp. 149-155.

Puig-Suari, J., Longuski, J.M., and Tragesser, S.G., "Aerocapture with a Flexible Tether," Journal of Guidance, Control, and Dynamics, Vol. 18, No. 6, November-December 1995, pp. 1305-1312.

Puig-Suari, J., Longuski, J.M., and Tragesser, S.G., "A Tether Sling for Lunar and Interplanetary Exploration," Acta Astronautica, Vol. 36, No. 6, September 1995, pp. 291-295.

Tsiotras, P., Corless, M., and Longuski, J.M., "A Novel Approach to the Attitude Control of Axi-Symmetric Spacecraft," Automatica, Vol. 31, No. 8, August 1995, pp. 1099-1112.

Tsiotras, P. and Longuski, J.M., "A New Parameterization of the Attitude Kinematics," Journal of the Astronautical Sciences, Vol. 43, No. 3, July-September 1995, pp. 243-262.

Patel, M.R., Longuski, J.M., and Sims, J.A., "A Uranus-Neptune-Pluto Opportunity," Acta Astronautica, Vol. 36, No. 2, July 1995, pp. 91-98.

Longuski, J.M., Puig-Suari, J., Tsiotras, P., and Tragesser, S.G., "Optimal Mass for Aerobraking Tethers," Acta Astronautica, Vol. 35, No. 8, April 1995, pp. 489-500.

Longuski, J.M. and Tsiotras, P., "Analytic Solution of the Large Angle Problem in Rigid Body Attitude Dynamics," Journal of the Astronautical Sciences, Vol. 43, No. 1, January-March 1995, pp. 25-46.

Longuski, J.M., Puig-Suari, J., and Mechalas, J., "Aerobraking Tethers for the Exploration of the Solar System," Acta Astronautica, Vol. 35, No. 2/3, January/February 1995, pp. 205-214.

Petropoulos, A. and Longuski, J.M., "Analysis of Mapping Coverage Obtained from Spacecraft," Celestial Mechanics and Dynamical Astronomy, Vol. 60, 1994, pp. 431-454.

Tsiotras, P. and Longuski, J.M., "Spin-Axis Stabilization of Symmetric Spacecraft with Two Control Torques," Systems & Control Letters, Vol. 23, December 1994, pp. 395-402.

Tsiotras, P. and Longuski, J.M., "New Kinematic Relations for the Large Angle Problem in Rigid Body Attitude Dynamics," Acta Astronautica, Vol. 32, No. 3, March 1994, pp. 181-190.

Tsiotras, P. and Longuski, J.M., "Analytic Solutions for a Spinning Rigid Body Subject to Time-Varying Body-Fixed Torques, Part II: Time-Varying Axial Torque," Journal of Applied Mechanics, Vol. 60, December 1993, pp. 976-981.

Longuski, J.M. and Tsiotras, P., "Analytic Solutions for a Spinning Rigid Body Subject to Time-Varying Body-Fixed Torques, Part I: Constant Axial Torque," Journal of Applied Mechanics, Vol. 60, December 1993, pp. 970-975.

Byrnes, D.V., Longuski, J.M., and Aldrin, B., "The Cycler Orbit Between Earth and Mars," Journal of Spacecraft and Rockets, Vol. 30, No. 3, May-June 1993, pp. 334-336.

Ostoja-Starzewski, M. and Longuski, J.M., "Stochastic Hill’s Equations for the Study of Errant Rocket Burns in Orbit," Celestial Mechanics and Dynamical Astronomy, Vol. 54, 1992, pp. 295-303.

Longuski, J.M., Todd, R.E., and K?nig, W.W., "Survey of Nongravitational Forces and Space Environmental Torques: Applied to the Galileo," Journal of Guidance, Control, and Dynamics, Vol. 15, No. 3, May-June 1992, pp. 545-553.

Longuski, J.M., "Probabilities of Escape, Reentry, and Orbit Decay Due to Misdirected Injection Maneuvers," Journal of Guidance, Control, and Dynamics, Vol. 15, No. 2, March-April 1992, pp. 410-415.

Longuski, J.M. and Williams, S.N., "Automated Design of Gravity-Assist Trajectories to Mars and the Outer Planets," Celestial Mechanics and Dynamical Astronomy, Vol. 52, No. 3, 1991, pp. 207-220.

Tsiotras, P. and Longuski, J.M., "A Complex Analytic Solution for the Attitude Motion of a Near-Symmetric Rigid Body Under Body-Fixed Torques," Celestial Mechanics and Dynamical Astronomy, Vol. 51, No. 3, 1991, pp. 281-301.

Puig-Suari, J. and Longuski, J.M., "Modeling and Analysis of Orbiting Tethers in an Atmosphere," Acta Astronautica, Vol. 25, No. 11, November 1991, pp. 679-686.

Longuski, J.M. and Williams, S.N., "The Last Grand Tour Opportunity to Pluto," Journal of the Astronautical Sciences, Vol. 39, No. 3, July-September 1991, pp. 359-365.

Williams, S.N. and Longuski, J.M., "Low Energy Trajectories to Mars via Gravity Assist from Venus and Earth," Journal of Spacecraft and Rockets, Vol. 28, No. 4, July-August 1991, pp. 486-488.

Longuski, J.M., "Real Solutions for the Attitude Motion of a Self-Excited Rigid Body," Acta Astronautica, Vol. 25, No. 3, March 1991, pp. 131-140.

Longuski, J.M., Kia, T., and Breckenridge, W.G., "Annihilation of Angular Momentum Bias During Spinning-Up and Thrusting Maneuvers," Journal of the Astronautical Sciences, Vol. 37, No. 4, October-December 1989, pp. 433-450.

Hintz, G.R. and Longuski, J.M., "Error Analysis for the Delivery of a Spinning Probe to Jupiter," Journal of Guidance, Control, and Dynamics, Vol. 8, No. 3, May-June 1985, pp. 384-390.

Longuski, J.M., "On the Attitude Motion of a Self-Excited Rigid Body," Journal of the Astronautical Sciences, Vol. 32, No. 4, October-December 1984, pp. 463-473.

Vinh, N.X., Johannesen, J.R., Longuski, J.M., and Hanson, J.M., "Second-Order Analytic Solution for Aerocapture and Ballistic Fly-Through Trajectories," Journal of the Astronautical Sciences, Vol. 32, No. 4, October-December 1984, pp. 429-445.

Longuski, J.M. and Kia, T., "A Parametric Study of the Behavior of the Angular Momentum Vector During Spin Rate Changes of Rigid Body Spacecraft," Journal of Guidance, Control, and Dynamics, Vol. 7, No. 3, May-June 1984, pp. 295-300.

Vinh, N.X., Longuski, J.M., Busemann, A., and Culp, R.D., "Analytic Theory of Orbit Contraction Due to Atmospheric Drag," Acta Astronautica, Vol. 6, May/June 1979, pp. 697-723.


BOOKS
Longuski, J.M., The Seven Secrets of How to Think Like a Rocket Scientist, Springer, New York, 2007.

Longuski, J.M., Advice to Rocket Scientists, American Institute of Aeronautics and Astronautics, Inc., Restin, Virginia, January 2004, 86 pages.

Conference Proceedings, Presentations, Invited Lectures

Gangestad, J.W., Pollock, G.E., and Longuski, J.M., "Lagrange's Planetary Equations for the Motion of Electrostatically Charged Spacecraft," AAS Paper No. 10-133, AAS/AIAA Space Flight Mechanics Meeting, February 14-17, 2010.

Pollock, G.E., Gangestad, J.W., and Longuski, J.M., "Lorentz Augmentation of Gravity-Assist Flybys with Electrostatically Charged Spacecraft, AAS Paper No. 10-227, AAS/AIAA Space Flight Mechanics Meeting, February 14-17, 2010.

Lynam, A.E., Kloster, K.W., and Longuski, J.M., "Assessment of Mulitple Satellite-Aided Capture at Jupiter," AAS Paper No. 09-424, AAS/AIAS Astrodynamics Specialist Conference, Pittsburgh, PA, August 9-13, 2009.

Pollock, G.E., Gangestad, J.W., and Longuski, J.M., "Charged Spacecraft Formations: A Trade Studey on Coulomb and Lorentz Forces," AAS Paper No. 09-389, AAS/AIAS Astrodynamics Specialist Conference, Pittsburgh, PA, August 9-13, 2009.

Kloster, K.W., Petropoulos, A.E., and Longuski, J.M., "Eurpoa Orbiter Mission Design with Io Gravity Assists," AAS Paper No. 09-353, AAS/AIAS Astrodynamics Specialist Conference, Pittsburgh, PA, August 9-13, 2009.

Gangestad, J.W., Pollock, G.E., and Longuski, J.M., "Constraints on the Motion of Electrostatically Charged Spacecraft," AAS Paper No. 09-342, AAS/AIAS Astrodynamics Specialist Conference, Pittsburgh, PA, August 9-13, 2009.

Link, D.A. and Longuski, J.M., "Dynamics of a Tether Sling System," Paper No. AIAA 2008-7381, AIAA/AAS Astrodynamics Specialist Conference and Exhibit, Honolulu, HI, August 18-21, 2008.

Gangestad, J.W., Pollock, G.E., and Longuski, J.M., "Dynamics of Lorentz Spacecraft with Application to a Mission to Enceladus," Paper No. AIAA 2008-7206, AIAA/AAS Astrodynamics Specialist Conference and Exhibit, Honolulu, HI, August 18-21, 2008.

Chen, K.J., Kloster, K.W., and Longuski, J.M., "A Graphical Method for Preliminary Design of Low-Thrust Gravity-Assist Trajectories," Paper No AIAA 2008-6952, AIAA/AAS Astrodynamics Specialist Conference and Exhibit, Honolulu, HI, August 18-21, 2008.

Moonjelly, P.V., Ambalavanan, M., Filmer, D.L., and Longuski, J.M., "Development of a Low-Cost, Low-Power Attitude Determination System for a Nano-Satellite," Paper No. AIAA 2006-6933, AIAA/AAS Astrodynamics Specialist Conference and Exhibit, Honolulu, HI, August 18-21, 2008.

Pollock, G.E., Gangestad, J.W., and Longuski, J.M., "Analysis of Lorentz Spacecraft Motion about Earth using the Hill-Clohessy-Wiltshire Equations," Paper No. AIAA 2008-6762, AIAA/AAS Astrodynamics Specialist Conference and Exhibit, Honolulu, HI, August 18-21, 2008.

Kloster, K.W., Yam, C.H., and Longuski, J.M., "Saturn Escape Options for Cassini Encore Missions," Paper No. AIAA 2008-6753, AIAA/AAS Astrodynamics Specialist Conference and Exhibit, Honolulu, HI, August 18-21, 2008.

Medlock, K.G. and Longuski, J.M., "Thermal Protection Tradeoffs for Ballute versus Aeroshell Entry and Descent at Mars," Paper No. AIAA 2008-6428, AIAA/AAS Astrodynamics Specialist Conference and Exhibit, Honolulu, HI, August 18-21, 2008.

Medlock, K. Gates, Alexeenko, A.A., and Longuski, J.M., "Analysis of Temperature-Constrained Ballute Aerocapture for High-Mass Mars Payloads," 6th International Planetary Probe Workshop, Atlanta, GA, June 23-27, 2008.

Henning, G.A. and Longuski, J.M., "Optimization of Aerogravity-Assist Trajectories for Waveriders," AAS 07-325, AAS/AIAA Astrodynamics Specialist Conference, Mackinac Island, Michigan, Aug. 19-23, 2007.

Gates Medlock, K.L., Alexeenko, A.A., and Longuski, J.M., "Trajectory and Aerothermodynamic Analysis of Towed-Ballute Aerocapture Using Direct Simulation Monte Carlo," AAS 07-307, AAS/AIAA Astrodynamics Specialist Conference, Mackinac Island, Michigan, Aug. 19-23, 2007.

Okutsu, M., Yam, C.H., and Longuski, J.M., "Cassini End-of-Life Escape Trajectories to the Outer Planets," AAS 07-258, AAS/AIAA Astrodynamics Specialist Conference, Mackinac Island, Michigan, Aug. 19-23, 2007.

Yam, C.H., Davis, D.C., Longuski, J.M., and Howell, K.C., "Saturn Impact Trajectories for Cassini End-of-Life," AAS 07-257, AAS/AIAA Astrodynamics Specialist Conference, Mackinac Island, Michigan, Aug. 19-23, 2007.

Patterson, C., Kakoi, M., Howell, K.C., Yam, C.H., and Longuski, J.M., "500-Year Eccentric Orbits for the Cassini Spacecraft within the Saturn System," AAS 07-256, AAS/AIAA Astrodynamics Specialist Conference Mackinac Island, Michigan, Aug. 19-23, 2007.

Gates Medlock, K.L. and Longuski, J.M., "Aerocapture Ballutes for the Exploration of the Solar System," Poster Presentation, 5th International Planetary Probe Workshop, Bordeaux, France, June 25-29, 2007.

Okutsu, M., Yam, C.H., and Longuski, J.M., "Low-Thrust Trajectories to Jupiter via Gravity Assists from Venus, Earth, and Mars," Paper No. AIAA 2006-6745, AIAA/AAS Astrodynamics Specialist Conference, Keystone, CO, August 21-24, 2006.

Yam, C.H. and Longuski, J.M., "Reduced Parameterization for Optimization of Low-Thrust Gravity-Assist Trajectories: Case Studies," Paper No. AIAA 2006-6744, AIAA/AAS Astrodynamics Specialist Conference, Keystone, CO, August 21-24, 2006.

Ayoubi, M.A. and Longuski, J.M., "Axial Velocity Solution for a Spinning-Up Rigid Body Subject to Constant Body-Fixed Forces and Moments," Paper No. AIAA 2006-6655, AIAA/AAS Astrodynamics Specialist Conference, Keystone, CO, August 21-24, 2006.

Landau, D.F. and Longuski, J.M., "Guidance Strategy for Hyperbolic Rendezvous," Paper No. AIAA 2006-6299, AIAA/AAS Astrodynamics Specialist Conference, Keystone, CO, August 21-24, 2006.

Medlock, K.L. Gates, Ayoubi, M.A., Longuski, J.M., and Lyons, D.T., "Analytic Solutions for Aerocapture, Descent, and Landing Trajectories for Dual-Use Ballute Systems," Paper No. AIAA 2006-6026, AIAA/AAS Astrodynamics Specialist Conference, Keystone, CO, August 21-24, 2006.

Chen, K., Okutsu, M., Landau, D., and Longuski, J.M., "Low-Thrust Aldrin Cycler with Reduced Encounter Velocities," Paper No. AIAA 2006-6021, AIAA/AAS Astrodynamics Specialist Conference, Keystone, CO, August 21-24, 2006.

Landau, D.F. and Longuski, J.M., "Continuous Mars Habitation with a Limited Number of Cycler Vehicles," Paper No. AIAA 2006-6020, AIAA/AAS Astrodynamics Specialist Conference, Keystone, CO, August 21-24, 2006.

Medlock, K.L. Gates and Longuski, J.M., "An Approach to Sizing a Dual-Use Ballute System for Aerocapture, Descent and Landing," 4th International Planetary Probe Workshop, Pasadena, CA, June 27-30, 2006.

Okutsu, M., Landau, D.F., and Longuski, J.M., "Low-Thrust Roundtrip Trajectories to Mars with One-Synodic-Period Repeat Time," AAS Paper 05-395, AAS/AIAA Astrodynamics Specialists Conference, Lake Tahoe, CA, August 7-11, 2005.

Yam, C.H and Longuski, J.M.., "Optimization of Low-Thrust Gravity Assist Trajectories with a Reduced Parameterization of the Thrust Vector," AAS Paper 05-375, AAS/AIAA Astrodynamics Specialists Conference, Lake Tahoe, CA, August 7-11, 2005.

Landau, D.F. and Longuski, J.M., "Mars Exploration via Earth-Mars Semi-Cyclers," AAS Paper 05-269, AAS/AIAA Astrodynamics Specialists Conference, Lake Tahoe, CA, August 7-11, 2005.

Ayoubi, M.A., Longuski, J.M., "Transverse Velocity Solution for a Spinning-Up Rigid Body Subject to Constant Body-Fixed Moments and Forces," AAS Paper 05-261, AAS/AIAA Astrodynamics Specialists Conference, Lake Tahoe, CA, August 7-11, 2005.

Medlock, K.L. Gates, Longuski, J.M., and Lyons, D.T., "A Dual-Use Ballute for Entry and Descent During Planetary Missions," 3rd International Planetary Probe Workshop, Anavyssos, Attica, Greece, June 27-July 1, 2005.

Yam, C.H., McConaghy, T.T., Chen, K.J., and Longuski, J.M., "Design of Low-Thrust Gravity-Assist Trajectories to the Outer Planets," Paper IAC-04-A.6.02, 55th International Astronautical Congress, Vancouver, Canada, October 4-8, 2004.

Yam, C.H., McConaghy, T.T., Chen, K.J., and Longuski, J.M., "Preliminary Design of Nuclear Electric Propulsion Missions to the Outer Planets," AAS/AIAA Astrodynamics Specialist Conference, Providence, RI, August 16-19, 2004.

Park, R.S., Scheeres, D.J., Giampieri, G., Longuski, J.M., and Fischbach, E., "Orbit Design for General Relativity Experiments: Heliocentric and Mercury-centric Cases," Paper AIAA 2004-5394, AAS/AIAA Astrodynamics Specialist Conference, Providence, RI, August 16-19, 2004.

McConaghy, T.T. and Longuski, J.M., "Parameterization Effects on Convergence When Optimizing a Low-Thrust-Trajectory with Gravity Assists," Paper AIAA 2004-5403, AAS/AIAA Astrodynamics Specialist Conference, Providence, RI, August 16-19, 2004.

Landau, D.F. and Longuski, J.M., "A Reassessment of Trajectory Options for Human Missions to Mars," Paper AIAA 2004-5095, AAS/AIAA Astrodynamics Specialist Conference, Providence, RI, August 16-19, 2004.

Park, R.S., Fischbach, E., Giampieri, G., Longuski, J.M., and Scheeres, D.J., "Test of General Relativity: Estimating PPN Parameters ? and ? from Spacecraft Radiometric Tracking Data," Poster Presentation and Proceedings, SPACEPART ’03, the Second International Conference on Particle and Fundamental Physics in Space, Washington, D.C., December 10-12, 2003.

Jokic, M. and Longuski, J.M., "Artificial Gravity and Abort Scenarios via Tethers for Human Missions to Mars," Paper AAS 03-536, AAS/AIAA Astrodynamics Specialist Conference, Big Sky, MT, August 3-7, 2003.

Javorsek, D., II, and Longuski, J.M., "Effect of Thrust Profile on Velocity Pointing Errors of Spinning Spacecraft," Paper AAS 03-516, AAS/AIAA Astrodynamics Specialist Conference, Big Sky, MT, August 3-7, 2003.

Javorsek, D., II, and Longuski, J.M., "Extension of Satellite Lifetime via Precision Pointing of Orbit Transfer Maneuvers," Paper AAS 03-515, AAS/AIAA Astrodynamics Specialist Conference, Big Sky, MT, August 3-7, 2003.

Landau, D.F., Longuski, J.M., and Penzo, P.A., "Parking Orbits for Human Missions to Mars," Paper AAS 03-514, AAS/AIAA Astrodynamics Specialist Conference, Big Sky, MT, August 3-7, 2003.

Landau, D.F. and Longuski, J.M., "Comparative Assessment of Human Missions to Mars," Paper AAS 03-513, AAS/AIAA Astrodynamics Specialist Conference, Big Sky, MT, August 3-7, 2003.

Chen, K.J., McConaghy, T.T., Landau, D.F., and Longuski, J.M., "A Powered Earth-Mars Cycler with Three Synodic-Period Repeat Time," Paper AAS 03-510, AAS/AIAA Astrodynamics Specialist Conference, Big Sky, MT, August 3-7, 2003.

McConaghy, T.T., Yam, C.H., Landau, D.F., and Longuski, J.M., "Two-Synodic-Period Earth-Mars Cyclers with Intermediate Earth Encounter," Paper AAS 03-509, AAS/AIAA Astrodynamics Specialist Conference, Big Sky, MT, August 3-7, 2003.

Park, R.S., Scheeres, D.J., Giampieri, G., Longuski, J.M., and Fischbach, E., "Estimating General Relativity Parameters from Radiometric Tracking of Heliocentric Trajectories," Paper AAS 03-205, AAS/AIAA Spaceflight Mechanics Meeting, Ponce, Puerto Rico, February 9-13, 2003.

Johnson, W.R., Longuski, J.M., and Lyons, D.T., "High-Fidelity Modeling of Semi-Autonomous Attitude Control During Aerobraking," Paper AIAA 2002-4909, AIAA/AAS Astrodynamics Specialist Conference, Monterey, CA, August 5-8, 2002.

Debban, T.J., McConaghy, T.T., and Longuski, J.M., "Design and Optimization of Low-Thrust Gravity-Assist Trajectories to Selected Planets," Paper AIAA 2002-4729, AIAA/AAS Astrodynamics Specialist Conference, Monterey, CA, August 5-8, 2002.

Jokic, M.D., Daniel, W.J.T., and Longuski, J.M., "3D Modelling of an Elastic Tether Using a Dissipative Time-Stepping Algorithm," Paper AIAA 2002-4643, AIAA/AAS Astrodynamics Specialist Conference, Monterey, CA, August 5-8, 2002.

Jokic, M.D. and Longuski, J.M., "Design of a Tether Sling for Human Transportation Systems Between Earth and Mars," Paper AIAA 2002-4642, AIAA/AAS Astrodynamics Specialist Conference, Monterey, CA, August 5-8, 2002.

Byrnes, D.V., McConaghy, T.T., and Longuski, J. M., "Analysis of Various Two Synodic Period Earth-Mars Cycler Trajectories," Paper AIAA 2002-4423, AIAA/AAS Astrodynamics Specialist Conference, Monterey, CA, August 5-8, 2002.

Chen, K.J., Landau, D.F., McConaghy, T.T., Okutsu, M., Longuski, J.M., and Aldrin, B., "Preliminary Analysis and Design of Powered Earth-Mars Cycling Trajectories," Paper AIAA 2002-4422, AIAA/AAS Astrodynamics Specialist Conference, Monterey, CA, August 5-8, 2002.

Chen, K.J., McConaghy, T.T., Okutsu, M., and Longuski, J.M., "A Low-Thrust Version of the Aldrin Cycler," Paper AIAA 2002-4421, AIAA/AAS Astrodynamics Specialist Conference, Monterey, CA, August 5-8, 2002.

McConaghy, T.T., Longuski, J.M., and Byrnes, D.V., "Analysis of a Broad Class of Earth-Mars Cycler Trajectories," Paper AIAA 2002-4420, AIAA/AAS Astrodynamics Specialist Conference, Monterey, CA, August 5-8, 2002.

McConaghy, T.T., Debban, T.J., Petropoulos, A.E., and Longuski, J.M., "An Approach to Design and Optimization of Low-Thrust Trajectories with Gravity-Assists," Paper AAS 01-468, AAS/AIAA Astrodynamics Specialists Conference, Quebec City, Quebec, Canada, July 30 - August 2, 2001.

Petropoulos, A.E. and Longuski, J.M., "A Shaped-Based Algorithm for the Automated Design of Low-Thrust, Gravity-Assist Trajectories," Paper AAS 01-467, AAS/AIAA Astrodynamics Specialists Conference, Quebec City, Quebec, Canada, July 30 - August 2, 2001.

Heaton, A.F. and Longuski, J.M., "The Feasibility of a Galileo-Style Tour of the Uranian Satellites," Paper AAS 01-464, AAS/AIAA Astrodynamics Specialists Conference, Quebec City, Quebec, Canada, July 30 - August 2, 2001.

Okutsu, M., Debban, T.J., and Longuski, J.M., "Tour Design Strategies for the Europa Orbiter Mission," Paper AAS 01-463, AAS/AIAA Astrodynamics Specialists Conference, Quebec City, Quebec, Canada, July 30 - August 2, 2001.

Johnson, W.R., Longuski, J.M., and Lyons, D.T., "Attitude Control During Auton-omous Aerobraking for Near-Term Mars Exploration," Paper AAS 01-388, AAS/ AIAA Astrodynamics Specialists Conference, Quebec City, Quebec, Canada, July 30 - August 2, 2001.

Petropoulos, A.E. and Longuski, J.M., "Automated Design of Low-Thrust Gravity-Assist Trajectories," Paper No. AIAA 2000-4033, AIAA/AAS Astrodynamics Specialist Conference, August 14-17, 2000, Denver, CO.

Heaton, A.F., Strange, N.J., Longuski, J.M., and Bonfiglio, E.P., "Automated Design of the Europa Orbiter Tour," Paper No. AIAA 2000-4034, AIAA/AAS Astrodynamics Specialist Conference, August 14-17, 2000, Denver, CO.

Strange, N.J. and Longuski, J.M., "A Graphical Method for Gravity-Assist Trajectory Design," Paper No. AIAA 2000-4030, AIAA/AAS Astrodynamics Specialist Conference, August 14-17, 2000, Denver, CO.

Okutsu, M. and Longuski, J.M., "Mars Free Returns via Gravity Assist from Venus," Paper No. AIAA 2000-4139, AIAA/AAS Astrodynamics Specialist Conference, August 14-17, 2000, Denver, CO.

Vinh, N.X., Johnson, W.R., and Longuski, J.M., "Mars Aerocapture using Bank Modulation," Paper No. AIAA 2000-4424, AIAA/AAS Astrodynamics Specialist Conference, August 14-17, 2000, Denver, CO.

Johnson, W.R. and Longuski, J.M., "Design of Aerogravity-Assist Trajectories," Paper No. AIAA 2000-4031, AIAA/AAS Astrodynamics Specialist Conference, August 14-17, 2000, Denver, CO.

McRonald, A.D., Randolph, J.E., Lewis, M.J., Bonfiglio, E.P., Longuski, J., and Kolodziej, P., "From LEO to the Planets Using Waveriders," AIAA Paper No. 1999-4803, AIAA International Space Planes and Hypersonic Systems and Technologies Conference, Norfolk, Virginia, November 1-5, 1999.

Gick, R.A., Williams, M.H., and Longuski, J.M., "Periodic Solutions for a Spinning Asymmetric Rigid Body with Constant Principal Axis Torque," AAS Paper No. 99-453, AAS/AIAA Astrodynamics Conference, Girdwood, Alaska, August 16-19, 1999.

Javorsek II, D. and Longuski, J.M., "Velocity Pointing Errors Associated with Spinning Thrusting Spacecraft," AAS Paper No. 99-452, AAS/AIAA Astrodynamics Conference, Girdwood, Alaska, August 16-19, 1999.

Bonfiglio, E.P., Longuski, J.M., and Vinh, N.X., "Automated Design of Aerogravity-Assist Trajectories," AAS Paper No. 99-361, AAS/AIAA Astrodynamics Conference, Girdwood, Alaska, August 16-19, 1999.

Petropoulos, A.E., Longuski, J.M., and Vinh, N.X., "Shaped-Based Analytic Representations of Low-Thrust Trajectories for Gravity-Assist Applications," AAS Paper No. 99 337, AAS/AIAA Astrodynamics Conference, Girdwood, Alaska, August 16-19, 1999.

Beck, R.A., Williams, M.H., and Longuski, J.M., "Floquet Solution for a Spinning Symmetric Rigid Body with Constant Transverse Torques," AIAA Paper No. 98-4385, AIAA/AAS Astrodynamics Conference, Boston, Massachusetts, August 10-12, 1998.

Petropoulos, A.E., Longuski, J.M., and Bonfiglio, E.P., "Trajectories to Jupiter via Gravity Assists from Venus, Earth, and Mars," AIAA Paper No. 98-4284, AIAA/AAS Astrodynamics Specialist Conference, Boston, Massachusetts, August 10-12, 1998.

Beck, R.A. and Longuski, J.M., "Large Angle Solution for a Spinning Rigid Body Subject to Constant Transverse Torques," AAS Paper No. 97-680, AAS/AIAA Astrodynamics Conference, Sun Valley, Idaho, August 4-7, 1997.

Tragesser, S.G. and Longuski, J.M., "Modeling Issues Concerning Motion of the Saturnian Satellites," AAS Paper No. 97-670, AAS/AIAA Astrodynamics Conference, Sun Valley, Idaho, August 4-7, 1997.

Kuchnicki, S.N., Tragesser, S.G., and Longuski, J.M., "Dynamics of a Tether Sling," AAS Paper No. 97-605, AAS/AIAA Astrodynamics Conference, Sun Valley, Idaho, August 4-7, 1997.

Tsiotras, P. and Longuski, J.M., "Comments on a New Parameterization of the Attitude Kinematics," AIAA Paper No. 96-3627, AIAA/AAS Astrodynamics Conference, San Diego, California, July 29-31, 1996.

Sims, J.A., Staugler, A.J., and Longuski, J.M., "Trajectory Options to Pluto via Gravity Assists from Venus, Mars, and Jupiter," AIAA Paper No. 96-3614, AIAA/AAS Astrodynamics Conference, San Diego, California, July 29-31, 1996.

Tragesser, S.G. and Longuski, J.M., "The Effect of Parameter Uncertainties on the Aerobraking Tether," AIAA Paper No. 96-3597, AIAA/AAS Astrodynamics Conference, San Diego, California, July 29-31, 1996.

Sims, J.A., Longuski, J.M., and Staugler, A.J., "Trajectory Options for Low-Cost Missions to Asteroids," IAA-L-0206, Second IAA International Conference on Low-Cost Planetary Missions, Laurel, Maryland, April 16-19, 1996.

Beck, R.A. and Longuski, J.M., "Annihilation of Transverse Velocity Bias During Spinning-Up Maneuvers," AAS Paper 95-414, AAS/AIAA Astrodynamics Conference, Halifax, Nova Scotia, Canada, August 14-17, 1995.

Randall, L.A., Longuski, J.M., and Beck, R.A., "Complex Analytic Solutions for a Spinning Rigid Body Subject to Constant Transverse Torques," AAS Paper 95-373, AAS/AIAA Astrodynamics Conference, Halifax, Nova Scotia, Canada, August 14-17, 1995.

Sims, J.A., Longuski, J.M., and Staugler, A.J., "V8 Leveraging for Interplanetary Missions: Multiple-Revolution Orbit Techniques," AAS Paper 95-306, AAS/AIAA Astrodynamics Conference, Halifax, Nova Scotia, Canada, August 14-17, 1995.

Tragesser, S.G., Longuski, J.M., and Puig-Suari, J., "A General Approach to Aerobraking Tether Design," AAS Paper 95-353, AAS/AIAA Astrodynamics Conference, Halifax, Nova Scotia, Canada, August 14-17, 1995.

Tragesser, S.G., Longuski, J.M., and Puig-Suari, J., "An Analytic Characterization of the Optimal Mass Problem for Aerobraking Tethers," Proceedings of the Fourth International Conference on Tethers In Space, pp. 1217-2381, Washington, D.C., April 10-14, 1995.

Sims, J.A. and Longuski, J.M., "Analysis of V Leveraging for Interplanetary Leveraging for Interplanetary Missions," AIAA Paper No. 94-3769, AIAA/AAS Astrodynamics Conference, Scottsdale,

Petropoulos, A.E. and Longuski, J.M., "Analysis of Mapping Coverage Obtained from Spacecraft," AIAA Paper No. 94-3767, AIAA/AAS Astrodynamics Conference, Scottsdale, Arizona, August 1-3, 1994.

Patel, M.R., Longuski, J.M., and Sims, J.A., "Mars Free Return Trajectories," AIAA Paper No. 94-3766, AIAA/AAS Astrodynamics Conference, Scottsdale, Arizona, August 1-3, 1994.

Tragesser, S.G., Longuski, J.M., Puig-Suari, J., and Mechalas, J.P., "Analysis of the Optimal Mass Problem for Aerobraking Tethers," AIAA Paper No. 94-3747, AIAA/AAS Astrodynamics Conference, Scottsdale, Arizona, August 1-3, 1994.

Beck, R.A. and Longuski, J.M., "Analytic Solution for the Velocity of a Rigid Body During Spinning-Up Maneuvers," AIAA Paper No. 94-3713, AIAA/AAS Astrodynamics Conference, Scottsdale, Arizona, August 1-3, 1994.

Puig-Suari, J., Longuski, J.M., and Tragesser, S., "A Tether Sling for Lunar and Interplanetary Exploration," IAA-L-0701P, IAA International Conference on Low-Cost Planetary Missions, Laurel, Maryland, April 12-15, 1994.

Patel, J.R. and Longuski, J.M., "A Uranus-Neptune-Pluto Opportunity," IAA-L-0408, IAA International Conference on Low-Cost Planetary Missions, Laurel, Maryland, April 12-15, 1994.

Sims, J.A. and Longuski, J.M., "Aerogravity-Assist Trajectories to the Outer Planets," IAA-L-0405P, IAA International Conference on Low-Cost Planetary Missions, Laurel, Maryland, April 12-15, 1994.

Tsiotras, P., Corless, M., and Longuski, J.M., "Invariant Manifold Techniques for Attitude Control of Symmetric Spacecraft," 32nd IEEE Conference on Decision and Control, San Antonio, Texas, December 15-17, 1993.

Longuski, J.M., Puig-Suari, J., Tsiotras, P., and Tragesser, S., "Optimal Mass for Aerobraking Tethers," 44th Congress of the International Astronautical Federation, Graz, Austria, October 16-22, 1993.

Puig-Suari, J., Longuski, J.M., and Tragesser, S., "A Three Dimensional Hinged-Rod Model for Flexible-Elastic Aerobraking Tethers," AAS Paper 93-730, AAS/AIAA Astrodynamics Conference, Victoria, British Columbia, Canada, August 16-19, 1993.

Patel, M.R. and Longuski, J.M., "Automated Design of Delta-V Gravity-Assist Trajectories for Solar System Exploration," AAS Paper 93-682, AAS/AIAA Astrodynamics Conference, Victoria, British Columbia, Canada, August 16-19, 1993.

Tsiotras, P. and Longuski, J.M., "Analytic Solution of Euler’s Equations of Motion for an Asymmetric Rigid Body," AAS Paper 93-580, AAS/AIAA Astrodynamics Conference, Victoria, British Columbia, Canada, August 16-19, 1993.

Tsiotras, P. and Longuski, J.M., "On Attitude Stabilization of Symmetric Spacecraft with Two Control Torques," American Control Conference, San Francisco, California, June 2-4, 1993.

Tsiotras, P. and Longuski, J.M., "On the Large Angle Problem in Rigid Body Attitude Dynamics," IAF Paper No. 92-0034, 43rd Congress (The World Space Congress) of the International Astronautical Federation, Washington, D.C., August 28-September 5, 1992.

Puig-Suari, J., Longuski, J.M., and Mechalas, J., "Aerobraking Tethers for the Exploration of the Solar System," IAF Paper No. 92-0001, 43rd Congress (The World Space Congress) of the International Astronautical Federation, Washington, D.C., August 28-September 5, 1992.

Puig-Suari, J. and Longuski, J.M., "Aerocapture with a Flexible Tether," AIAA Paper No. 92-4662, AIAA/AAS Astrodynamics Conference, Hilton Head Island, South Carolina, August 10-12, 1992.

Tsiotras, P. and Longuski, J.M., "A Complex Analytic Solution for the Attitude Motion of a Near-Symmetric Rigid Body Under Body-Fixed Torques," IAF Paper No. 91-359, 42nd Congress of the International Astronautical Federation, Montreal, Canada, October 5-11, 1991.

Longuski, J.M. and Puig-Suari, J., "Hyperbolic Aerocapture and Elliptic Orbit Transfer with Tethers," IAF Paper 91-339, 42nd Congress of the International Astronautical Federation, Montreal, Canada, October 5-11, 1991.

Puig-Suari, J. and Longuski, J.M., "Perturbation Analysis of Aerocapture with Tethers," AAS Paper 91-549, AAS/AIAA Astrodynamics Conference, Durango, Colorado, August 19-22, 1991.

Tsiotras, P. and Longuski, J.M., "Analytic Solutions for the Attitude Motion of Spinning Rigid Bodies Subject to Periodic Torques," AAS Paper 91-404, AAS/AIAA Astrodynamics Conference, Durango, Colorado, August 19-22, 1991.

Longuski, J.M. and Tsiotras, P., "Attitude Motion of a Rigid Body Subject to Polynomial Torques," AAS Paper 91-405, AAS/AIAA Astrodynamics Conference, Durango, Colorado, August 19-22, 1991.

Longuski, J.M., "Real Solutions for the Attitude Motion of a Self-Excited Rigid Body," IAF Paper 90-317, 41st Congress of the International Astronautical Federation, Dresden, Germany, October 6-12, 1990.

Williams, S.N. and Longuski, J.M., "Automated Design of Multiple Encounter Gravity-Assist Trajectories," AIAA Paper 90-2982, AIAA/AAS Astrodynamics Conference, Portland, Oregon, August 20-22, 1990.

Puig-Suari, J. and Longuski, J.M., "Modeling and Analysis of Orbiting Tethers in an Atmosphere," AIAA Paper 90-2897, AIAA/AAS Astrodynamics Conference, Portland, Oregon, August 20-22, 1990.

Longuski, J.M., Campbell, R.S., and Klumpe, E.W., "Error Analysis for Pulsed Maneuvers of a Dual-Spin Spacecraft," AAS Paper 89-396, AAS/AIAA Astrodynamics Specialist Conference, Stowe, Vermont, August 7-10, 1989.

Longuski, J.M. and McRonald, A.D., "An Analytic-Geometric Model of the Effect of Spherically Distributed Injection Errors for Galileo and Ulysses Spacecraft: The Multi-Stage Problem," AIAA Paper 88-4245-CP, AIAA/AAS Astrodynamics Conference, Minneapolis, Minnesota, August 15-17, 1988.

Longuski, J.M., "An Analytic-Geometric Model of the Effect of Spherically Distributed Injection Errors for the Galileo and Ulysses Spacecraft," AAS Paper 87-487, AAS/AIAA Astrodynamics Specialist Conference, Kalispell, Montana, August 10-13, 1987.

Friedlander, A., Niehoff, J., Byrnes, D., and Longuski, J.M., "Circulating Transportation Orbits between Earth and Mars," AIAA Paper 86-2009-CP, AIAA/AAS Astrodynamics Conference, Williamsburg, Virginia, August 18-20, 1986.

Longuski, J.M. and Wolf, A.A., "The Galileo Orbital Tour for the 1986 Launch Opportunity," AIAA Paper 86-2006-CP, AIAA/AAS Astrodynamics Conference, Williamsburg, Virginia, August 18-20, 1986.

Kia, T. and Longuski, J.M., "Error Analysis of Analytic Solutions for Self-Excited Near Symmetric Rigid Bodies: A Numerical Study," AIAA Paper 84-2018, AIAA/AAS Astrodynamics Conference, Seattle, Washington, August 20-22, 1984.

Klumpe, E.W. and Longuski, J.M., "Secular Solution for Delta-V During Spin Rate Change Maneuvers of Rigid Body Spacecraft," AIAA Paper 84-2011, AIAA/AAS Astrodynamics Conference, Seattle, Washington, August 20-22, 1984.

Longuski, J.M. and Myers, M.R., "Analytic Models of Mapping Coverage of the Galilean Satellites," AIAA Paper 84-1998, AIAA/AAS Astrodynamics Conference, Seattle, Washington, August 20-22, 1984.

Vinh, N.X., Johannesen, J.R., Longuski, J.M., and Hanson, J.M., "Second-Order Analytic Solution for Aerocapture and Ballistic Fly-Through Trajectories," AAS Paper No. 83-415, AAS/AIAA Astrodynamics Specialist Conference, Lake Placid, New York, August 22-25, 1983.

Longuski, J.M., Kia, T., and Breckenridge, W.G., "Annihilation of Angular Momentum Drift During Spinning-Up and Thrusting Maneuvers of Rigid Bodies," AAS Paper No. 83-408, AAS/AIAA Astrodynamics Specialist Conference, Lake Placid, New York, August 22-25, 1983.

Hintz, G.R. and Longuski, J.M., "Mission Analysis for the Delivery of a Spinning Probe to Jupiter," AAS Paper 83-312, AAS/AIAA Astrodynamics Specialist Conference, Lake Placid, New York, August 22-25, 1983.

Longuski, J.M. and Kia, T., "A Parametric Study of the Behavior of the Angular Momentum Vector During Spin Rate Changes of Rigid Body Spacecraft," AIAA Paper No. 82-1467, AIAA/AAS Astrodynamics Conference, San Diego, California, August 9-11, 1982.

Longuski, J.M. and Koenig, W., "A Survey of Nongravitational Forces and Space Environmental Torques with Applications to the Galileo Spacecraft," AIAA Paper No. 82-1457, AIAA/AAS Astrodynamics Conference, San Diego, California, August 9-11, 1982.

Longuski, J.M., "Simulation of the Galileo Spacecraft Axial Delta-V Algorithm," Proceedings of the 10th IMAC (International Association for Mathematics and Computers in Simulation) World Congress on System Simulation and Scientific Computation, Volume 3, page 235, Montreal, Canada, August 8-13, 1982.

Longuski, J.M., "Galileo Maneuver Analysis," Paper No. 81-137, AAS/AIAA Astrodynamics Specialist Conference, Lake Tahoe, Nevada, August 3-5, 1981.

Longuski, J.M., "Comments on the Leimanis Solution of Self-Excited Rigid Body," Paper No. 81-104, AAS/AIAA Astrodynamics Specialist Conference, Lake Tahoe, Nevada, August 3-5, 1981.

Longuski, J.M., "Solution of Euler’s Equations of Motion and Eulerian Angles for Near Symmetric Rigid Bodies Subject to Constant Moments," AIAA Paper No. 80-1642, AIAA/AAS Astrodynamics Conference, Danvers, Massachusetts, August 11-13, 1980.


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