Effect of Cutoff Latitude on Cutoff Conditions for Transfer Orbits to Venus.

by Louis N. Rowell, Carolyn R. Huber

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An analysis of the effect on cutoff conditions of varying the geocentric latitude of the propulsion cutoff point for some interplanetary transfer trajectories to Venus. The computations were performed with an IBM 7090 computer. The results are presented graphically to indicate clearly the velocity penalties that can be incurred if there is not complete freedom in choosing the geocentric latitude of the cutoff point (i.e., the point of injection into the hyperbolic escape orbit). The study indicates that it may be desirable to use parking orbits for U.S. space shots to gain the freedom to select the most advantageous point to enter the escape orbit. 43 pp.

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