Guiding a space vehicle into the orbit of a Mars satellite by braking in the planet's atmosphere

Physics

Scientific paper

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Aerodynamic Brakes, Atmospheric Entry, Mars Probes, Orbital Maneuvers, Algorithms, Mars Atmosphere, Mathematical Models, Space Navigation, Turning Flight

Scientific paper

A multistep algorithm is developed which can be used to analyze the time-dependence of the command angle of bank necessary to inject a space vehicle into the orbit of a Mars satellite by means of aero-dynamic braking in the planet's atmosphere. At each step navigation parameters for the remaining portion of the entrance trajectory are refined using data from a stabilized accelerometer and information on the orbit prior to entry into the atmosphere, and applying a method based on the parametric family of navigation trajectories developed by Okhotsimskyi et al. (1975). A numerical example is given. It is shown that the width of the entry corridor assured by this algorithm differs from that physically possible by less than 1 km.

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