We show that it is possible to launch a satellite to Geostationary Equatorial orbit (GEO) from the non-equatorial launch site (Naro Space Center in South Korea) even though that is located in the mid-latitudes of the northern hemisphere. When launched from this site, the equatorial inclination after separation will be 80°. We use a lunar gravity assist (LGA) transfer to avoid the excessive ∆V costs of plane change maneuvers. There are eight possible paths for the LGA; there are four paths consisting of Earth departures and free-return types, and there are two nodes of the Moon’s orbit (ascending and descending). We analyze trajectories over five launch periods for each path using a high-fidelity orbit propagation model. We show that the LGA changes the orbital energy of the “cislunar” free-returns more than for the “circumlunar” free-returns, resulting in less geostationary insertion ∆V for the cislunar free-returns. We also show that the geometrical ∆V variation over the different paths is greater than the seasonal ∆V variation. Our results indicate that an ascending departure and cislunar free-return at the descending node have lower ∆V requirements than the other paths, and lower than described in several previous studies.


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    Titel :

    Geostationary Orbit Transfer with Lunar Gravity Assist from Non-equatorial Launch Site


    Weitere Titelangaben:

    J Astronaut Sci


    Beteiligte:
    Choi, Su-Jin (Autor:in) / Carrico, John (Autor:in) / Loucks, Mike (Autor:in) / Lee, Hoonhee (Autor:in) / Kwon, Sejin (Autor:in)

    Erschienen in:

    Erscheinungsdatum :

    2021-12-01


    Format / Umfang :

    20 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch






    Geostationary Orbits From Mid-Latitude Launch Sites Via Lunar Gravity Assist (AAS 93-289)

    Graziani, F. / Castronuovo, M. M. / Teofilatto, P. et al. | British Library Conference Proceedings | 1993