The Earth-Moon Transfer Trajectory Design and Analysis using Intermediate Loop Orbits

Details The Earth-Moon Transfer Trajectory Design and Analysis using Intermediate Loop Orbits The Earth-Moon Transfer Trajectory Design and Analysis using Intermediate Loop Orbits

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009jass...26..171s&link_type=abstract

Journal of Astronomy and Space Sciences. Vol. 26, no. 2, 171-186

Astronomy and Astrophysics

Astronomy

2

Earth-Moon Transfer Trajectory, Mission Design, Optimal Trajectory, Impulsive Thrust, Kslv-2

Scientific paper

Various Earth-Moon transfer trajectories are designed and analyzed to prepare the future Korea's Lunar missions. Minimum fuel trajectory solutions are obtained for the departure year of 2017, 2020, 2022, and every required mission phases are analyzed from Earth departure to the final lunar mission orbit. N-body equations of motion are formulated which include the gravitational effect of the Sun, Earth and Moon. In addition, accelerations due to geopotential harmonics, Lunar J2 and solar radiation pressures are considered. Impulsive high thrust is assumed as the main thrusting method of spacecraft with launcher capability of KSLV-2 which is planned to be developed. For the method of injecting a spacecraft into a trans Lunar trajectory, both direct shooting from circular parking orbit and shooting from the multiple elliptical intermediate orbits are adapted, and their design results are compared and analyzed. In addition, spacecraft's visibility from Deajeon ground station are constrained to see how they affect the magnitude of TLI (Trans Lunar Injection) maneuver. The results presented in this paper includes launch opportunities, required optimal maneuver characteristics for each mission phase as well as the trajectory characteristics and numerous related parameters. It is confirmed that the final mass of Korean lunar explorer strongly depends onto the initial parking orbit's altitude and launcher's capability, rather than mission start time.

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