@InProceedings{MarquesMoniKuga:2005:AnCoMo,
               author = "Marques, Haroldo Antonio and Monico, Jo{\~a}o Francisco Galera 
                         and Kuga, H{\'e}lio Koiti",
                title = "An{\'a}lise comparativa dos modelos de press{\~a}o de 
                         radia{\c{c}}{\~a}o solar nos sat{\'e}lites GPS",
            booktitle = "Anais...",
                 year = "2005",
                pages = "6",
         organization = "Col{\'o}quio Brasileiro de Ci{\^e}ncias Geod{\'e}sicas, 4. 
                         (CBCG).",
             keywords = "GPS, {\'o}rbitas dos sat{\'e}lites, press{\~a}o de 
                         radia{\c{c}}{\~a}o solar, IGS (international GPS service), 
                         satellites orbits, solar radiation pressure.",
             abstract = "A determina{\c{c}}{\~a}o das {\'o}rbitas dos sat{\'e}lites 
                         artificiais {\'e} fundamental para a Geod{\'e}sia. Para a 
                         realiza{\c{c}}{\~a}o deste processo {\'e} necess{\'a}rio, 
                         primeiramente, fazer uma modelagem precisa das v{\'a}rias 
                         for{\c{c}}as ou perturba{\c{c}}{\~o}es que atuam nos 
                         sat{\'e}lites. Estas for{\c{c}}as incluem as gravitacionais e as 
                         n{\~a}o-gravitacionais, que reunidas num vetor 
                         acelera{\c{c}}{\~a}o total, deve ser integrado numericamente em 
                         um sistema de refer{\^e}ncia inercial, uma vez para obter a 
                         velocidade e duas, para obter a posi{\c{c}}{\~a}o dos 
                         sat{\'e}lites. No caso das for{\c{c}}as gravitacionais 
                         t{\^e}m-se as perturba{\c{c}}{\~o}es causadas pela 
                         arra{\c{c}}{\~a}o gravitacional da Terra, Lua e Sol, al{\'e}m 
                         das mar{\'e}s oce{\^a}nicas e terrestres, enquanto que nas 
                         n{\~a}o-gravitacionais est{\~a}o inclu{\'{\i}}das as 
                         for{\c{c}}as de superf{\'{\i}}cie (atrito do ar, press{\~a}o 
                         de radia{\c{c}}{\~a}o solar e radia{\c{c}}{\~a}o 
                         infravermelha), al{\'e}m de outras for{\c{c}}as perturbadoras. 
                         Na Faculdade de Ci{\^e}ncias e Tecnologia - FCT/UNESP, est{\'a} 
                         dispon{\'{\i}}vel o G{\'A}S (GPS Analysis Software) (Monico, 
                         1995 e Stewart et ai., 1994), o qual disp{\~o}e do aplicativo 
                         GPSORBIT para integra{\c{c}}{\~a}o de {\'o}rbitas. Este 
                         aplicativo est{\'a} em fase de atualiza{\c{c}}{\~o}es, sendo 
                         uma delas a implementa{\c{c}}{\~a}o de modelos de press{\~a}o 
                         de radia{\c{c}}{\~a}o solar e, neste trabalho foi analisada a 
                         influ{\^e}ncia dessa perturba{\c{c}}{\~a}o na 
                         integra{\c{c}}{\~a}o das {\'o}rbitas dos sat{\'e}lites GPS, 
                         al{\'e}m de uma an{\'a}lise comparativa do modelo conhecido como 
                         Bola de Canh{\~a}o (Cannon Bali) com o modelo ROCK 42. --> 
                         ABSTRACT: The artificial satellites orbit determination is 
                         fundamental to Geodesy. For realization of this process it is 
                         needed, first, a precise modeling of the many forces and 
                         perturbations acting on the satellite. These forces include the 
                         gravitational and non-gravitational ones that considered in the 
                         resulting acceleration vector, must be integrated by a numerical 
                         process in the inertial reference system, once to obtain the 
                         velocity and twice for the satellite positions. In the cases of 
                         the gravitational force the perturbations are had caused by the 
                         gravitational attraction of the Earth, Moon and Sun, besides the 
                         oceanic and terrestrial tides, while in the non-gravitational ones 
                         the surface force are included (attrition of the air, solar 
                         radiation pressure and infrared radiation), besides other 
                         perturbation forces. In the Faculdade de Ci{\^e}ncias e 
                         Tecnologia -FCT/UNESP, is available the G{\'A}S (GPS Analysis 
                         Software) (Monico, 1995 and Stewart et ai., 1994), that h{\'a}s 
                         the GPSORBIT application module for orbit integration. This module 
                         is being updated with the radiation pressure models implementation 
                         and in this paper it was analyzed the influence of such 
                         perturbation in the GPS satellites orbits integration, besides a 
                         comparative analysis of the model known by {"}Cannon Bali{"} with 
                         the ROCK 42 model.",
  conference-location = "Curitiba",
      conference-year = "16 a 20 de maio",
           copyholder = "SID/SCD",
             language = "pt",
           targetfile = "42tmarquesmk.pdf",
        urlaccessdate = "19 abr. 2024"
}