Interplanetary missions require years of advance planning, and development program uncertainties often mean that exact launch dates cannot be known when mission planners begin their work. As a result, it is often necessary to consider multiple alternative departure windows. To aid in mission planning activities, studies are periodically published that compile a list of candidate trajectories for use by the broader community. This practice is common for high-thrust trajectories where impulsive burn assumptions provide adequate fidelity for mission planning, allowing for straight-forward solutions to the Patched Conic Approximation. However, low-thrust missions are more complex, since trajectory solutions cannot be similarly decoupled from specific vehicle propulsion attributes such as thrust-to-weight and specific impulse. This leads to a higher computational expense for developing candidate trajectories; it also increases the dimensionality of the tables to be generated, resulting in the need for a much larger number of trajectories to be evaluated. Of great interest would be an efficient approach that enables the publishing of parametric low-thrust trajectory opportunities, providing interplanetary mission planners with resources analogous to the existing high-thrust trajectory databases. Two key elements would be required to develop such an approach: First, the ability to evaluate and optimize a large number of candidate trajectories; and second, a means to publish the results in a compact, usable form. Just such an approach is presented in this paper. As a demonstration of the approach, a parametric model is built around a baseline Earth-Mars flyby mission.
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