Rapid design of gravity assist trajectories

Details Rapid design of gravity assist trajectories Rapid design of gravity assist trajectories

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991stia...9244553c&link_type=abstract

ESA, International Symposium on Spacecraft Flight Dynamics, 3rd, Darmstadt, Federal Republic of Germany, Sept. 30-Oct. 4, 1991,

Computer Science

Graphics

Many Body Problem, Swingby Technique, Trajectory Planning, Computer Graphics, Computer Programs, Earth Gravitation, Geomagnetism, Lunar Gravitation, Solar Terrestrial Interactions

Scientific paper

Several International Solar-Terrestrial Physics (ISTP) missions require the design of complex gravity-assisted trajectories in order to investigate the interaction of the solar wind with the earth's magnetic field. These trajectories present a formidable trajectory design and optimization problem. This paper discusses the philosophy and methodology that enable an analyst to design and analyze such trajectories. The authors describe what is called 'floating end-point' targeting, which allows the inherently nonlinear multiple body problem to be solved with simple linear techniques. This paper demonstrates how floating end-point targeting combines analytic approximations with a Newton method targeter to achieve trajectory design goals quickly, even for the very sensitive double lunar swingby trajectories used by the ISTP missions. A Multiconic orbit integration scheme allows fast and accurate orbit propagation. This paper also describes a prototype software tool, Swingby, which has been built for trajectory design and launch window analysis.

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