@Article{GalskiOrla:2012:AuOrCo,
               author = "Galski, Roberto Luiz and Orlando, Valcir",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto 
                         Nacional de Pesquisas Espaciais (INPE)}",
                title = "Autonomous orbit control procedure, using a simplified GPS 
                         navigator and a new longitude phase drift prediction method, 
                         applied to the CBERS satellite",
              journal = "Journal of Aerospace Engineering, Sciences and Applications",
                 year = "2012",
               volume = "4",
               number = "3",
                pages = "54--61",
                month = "Set.",
             keywords = "Satellite Control, Autonomous orbit control, GPS, Autonomous 
                         navigator, Kalman Filter.",
             abstract = "This paper presents a performance analysis of an autonomous orbit 
                         control procedure using a simplified GPS navigator (Galski et al., 
                         2001), where the ground track drift of the satellite is estimated 
                         on-board with help of a recently developed approach (Orlando et 
                         al., 2009) that directly calculates the acceleration of the orbit 
                         ground track as a function of the solar and geomagnetic activity. 
                         The simplified navigation procedure improves the coarse geometric 
                         navigation solution provided by GPS receivers. This is done by 
                         using the GPS solutions as inputs (observations) for a real time 
                         Kalman filtering process. The orbital state vector is extended and 
                         includes the systematic error imposed to the GPS geometric 
                         solution by the changes in the set of satellites which are visible 
                         to the receiver. The simplified navigator has reduced 
                         computational cost, allowing it to be carried and executed 
                         on-board of spacecrafts. The improved outputs of this process are 
                         used in the computational implementation of an autonomous control 
                         system for the ground track drift of the spacecraft orbit. The 
                         behavior of the system is evaluated by means of orbit simulations 
                         using a CBERS-like phased remote sensing satellite. The aim of the 
                         paper is to verify if the coupled system is able to correctly 
                         calculate and perform variable size semi-major axis orbit 
                         increment maneuvers in order to keep the satellite ground track 
                         within its allowed limits (±4km).",
                 issn = "2236-577X",
                label = "lattes: 8427569272485063 1 GalskiOrla:2012:AuOrCo",
             language = "en",
           targetfile = "5-GalskiOrlando.pdf",
                  url = "http://www.aeroespacial.org.br/jaesa/editions2.html#v4n3",
        urlaccessdate = "30 abr. 2024"
}