Launch opportunity classification of VEGA and delta V-EGA trajectories to the outer planets

Details Launch opportunity classification of VEGA and delta V-EGA trajectories to the outer planets Launch opportunity classification of VEGA and delta V-EGA trajectories to the outer planets

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976aaas.confq....s&link_type=abstract

American Institute of Aeronautics and Astronautics and American Astronautical Society, Astrodynamics Conference, San Diego, Cali

Astronomy and Astrophysics

Astronomy

Delta Launch Vehicle, Grand Tours, Interplanetary Trajectories, Midcourse Trajectories, Trajectory Analysis, Vega Launch Vehicle, Ballistic Trajectories, Earth-Venus Trajectories, Histograms, Payloads, Spacecraft Launching, Tables (Data), Transfer Orbits

Scientific paper

Two concepts in spacecraft trajectory design which have been proposed by Hollenbeck (1975) and Bender and Friedlander (1975) are considered. Both concepts are intended for planetary missions and require an earth reencounter created by either a Venus gravity assist (VEGA) or a large midcourse impulse (delta V-EGA). In the case of outer planet missions, the new concepts offer significantly lower launch energy requirements than the direct ballistic flight mode. However, at least an additional two years flight time is needed for geometry phasing to set up the earth reencounter. A description is given of the trajectory characteristics for the two concepts. Attention is also given to the method of analysis used for the studies, aspects of trajectory generation, payload calculations, and target opportunity data.

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