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@InProceedings{OrlandoGued:1998:FlDyLE,
               author = "Orlando, Valcir and Guedes, Ulisses Thadeu Vieira",
                title = "Flight dynamics LEOP and routine operations for SCD2, the INPE's 
                         second environmental data collecting satellite",
                 year = "1998",
                pages = "997--1007",
         organization = "AAS/GSFC International Symposium on Spaceflight Dynamics, 13.",
             keywords = "ENGENHARIA E TECNOLOGIA ESPACIAL, SCD 2, FLIGHT MECHANICS, 
                         SATELLITE ATTITUDE CONTROL, SPIN STABILIZATIO, ATTITUDE STABILITY, 
                         COMPUTER PROGRAMS, SATELLITE ORIENTATION, SATELLITE ROTATION, 
                         SPACECRAFT MANEUVERS.",
             abstract = "The launch of the second INPE's environmental data collecting 
                         satellite, SCD2, is preliminarily scheduled for May 1998, by the 
                         American Pegasus launcher. This satellite is similar to the 
                         SCD2-A, whose launch, in November 2, 1997, by the Brazilian VLS 
                         launcher unfortunately, failed. When compared with the SCD1, the 
                         SCD2 presents important differences related mainly to attitude 
                         stabilization and control. This paper presents an analysis of the 
                         main differences between both satellites and discusses their 
                         impacts on the flight dynamics system and related operations. For 
                         instance, the restriction on spin-axis attitude is, for the SCD2, 
                         more stringent than the ones imposed on the SCD1, requiring the 
                         application of a Quarter-Orbit Magnetic Attitude Control procedure 
                         (QOMAC). The spin-axis attitude control of SCD2 is detailed and 
                         its performance is analyzed with the help of available simulation 
                         results. Finally, the planning of the flight dynamics operations 
                         for the LEOP and routine phase of the SCD2 is described.",
      conference-year = "May 1998",
                label = "10919",
           targetfile = "1998_orlando.pdf",
        urlaccessdate = "22 jan. 2021"
}


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