@Article{MurciaPiņerosMoraPrad:2022:UsLoLi,
               author = "Murcia Piņeros, Jhonathan O. and Moraes, Rodolpho Vilhena de and 
                         Prado, Antonio Fernando Bertachini de Almeida",
          affiliation = "{Universidade Estadual Paulista (UNESP)} and {Universidade 
                         Estadual Paulista (UNESP)} and {Instituto Nacional de Pesquisas 
                         Espaciais (INPE)}",
                title = "Using low Lift-to-Drag spacecraft to perform upper atmospheric 
                         Aero-Gravity Assisted Maneuvers",
              journal = "Advances in Space Research",
                 year = "2022",
               volume = "70",
               number = "4",
                pages = "1032--1047",
                month = "Aug.",
             keywords = "Aerodynamic forces, Astrodynamics, Atmosphere, Interplanetary 
                         flight, Orbit propagation, Spacecraft maneuvers, Swing-by.",
             abstract = "The Gravity Assisted Maneuver has been applied in lots of space 
                         missions, to change the spacecraft heliocentric velocity vector 
                         and the geometry of the orbit, after the close approach to a 
                         celestial body, saving propellant consumption. It is possible to 
                         take advantage of additional forces to improve the maneuver, like 
                         the forces generated by the spacecraft-atmosphere interaction 
                         and/or propulsion systems; reducing the time of flight and the 
                         need for multiple passages around secondary bodies. However, these 
                         applications require improvements in critical subsystems, which 
                         are necessary to accomplish the mission. In this paper, a few 
                         combinations of the Gravity-Assist were classified, including 
                         maneuvers with thrust and aerodynamic forces; presenting the 
                         advantages and limitations of these variations. There are analyzed 
                         the effects of implementing low Lift-to-Drag ratios at high 
                         altitudes for Aero-gravity Assist maneuvers, with and without 
                         propulsion. The maneuvers were simulated for Venus and Mars, due 
                         to their relevance in interplanetary missions, the interest in 
                         exploration, and the knowledge about their atmospheres. The 
                         Aero-gravity Assist maneuver with low Lift-to-Drag ratios at high 
                         altitudes shows an increase of more than 10° in the turn angle for 
                         Venus and 2.5° for Mars. The maneuvers increase the energy gains 
                         by more than 15% when compared to the Gravity-Assist. From the 
                         Technology Readiness Levels, it was observed that the current 
                         level of development of the space technology makes feasible the 
                         application of Aero-gravity Assisted Maneuvers at high altitudes 
                         in short term.",
                  doi = "10.1016/j.asr.2022.05.031",
                  url = "http://dx.doi.org/10.1016/j.asr.2022.05.031",
                 issn = "0273-1177 and 1879-1948",
             language = "en",
           targetfile = "1-s2.0-S0273117722004100-main.pdf",
        urlaccessdate = "13 maio 2024"
}