The Flyby Geometry Optimization Tool is a computer program for computing trajectories and trajectory-altering impulsive maneuvers for spacecraft used in radio relay of scientific data to Earth from an exploratory airplane flying in the atmosphere of Mars. This program implements a genetic algorithm (GA) to choose trajectories to maximize the volume of data relayed via at least one of three spacecraft: a main spacecraft in a hyperbolic orbit and two alternate spacecraft in elliptical orbits about Mars. [The GA approach is ideal for this type of optimization problem, wherein discrete data-transmission rates lead to discontinuities in data-collection volumes that one seeks to maximize. Such discontinuities are typically problematic for other optimization methods — especially, gradient search methods.]

Accumulated and Transmitted Data are shown as a function of time

This program was written by Christopher D. Karlgaard of Analytical Mechanics Associates, Inc. for Langley Research Center.

This Brief includes a Technical Support Package (TSP).

Flyby Geometry Optimization Tool (reference LAR-16884-1) is currently available for download from the TSP library.

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