@InProceedings{NwankwoDAAFCRCE:2020:SiAtDr,
               author = "Nwankwo, Victor Uchenna. J. and Denig, William and Ajakaiye, 
                         Muyiwa P. and Akanni, Wahabbi and Fatokun, Johnson and 
                         Chakrabarti, Sandip K. and Raulin, Jean-Pierre and Correia, 
                         Em{\'{\i}}lia and Enoh, John E.",
          affiliation = "{Anchor University} and {St. Joseph College of Maine} and {Anchor 
                         University} and {Anchor University} and {Anchor University} and 
                         {Indian Centre for Space Physics} and {Universidade Presbiteriana 
                         Mackenzie} and {Instituto Nacional de Pesquisas Espaciais (INPE)} 
                         and {Interorbital systems}",
                title = "Simulation of atmospheric drag effect on low Earth orbit 
                         satellites during intervals of perturbed and quiet geomagnetic 
                         conditions in the magnetosphere-ionosphere system",
            booktitle = "Proceedings...",
                 year = "2020",
                pages = "1--7",
         organization = "International Conference in Mathematics, Computer Engineering and 
                         Computer Science (ICMCECS)",
            publisher = "IEEE",
             keywords = "atmospheric drag, satellite, ionosphere.",
             abstract = "In this work, we simulate the effect of atmospheric drag on two 
                         model low Earth orbit (LEO) satellites with different ballistic 
                         coefficient during 1-month intervals of geomagnetically disturbed 
                         and relatively quiet conditions, to understand how solar and 
                         geomagnetic activity modulates satellites trajectory in Earths 
                         orbit. Our results showed that geomagnetic disturbances on the 
                         upper atmosphere associated with high solar activity caused a 
                         total decay of 2.77 km and 3.09 km for SAT-A and Sat-B, 
                         respectively during the 1-month period, but only about 0.52 km and 
                         0.65 km, respectively during the interval of relatively quiet 
                         geomagnetic condition. The mean orbit decay rates (ODR) of the two 
                         satellites are ~90 m/day and ~100 m/day, respectively during the 
                         perturbed regime, while the respective values for the relatively 
                         quiet regime are ~17 m/day and 21 m/day. Within the two regimes, 
                         further analysis and simulation of the satellites responses during 
                         12-day intervals of elevated solar and geomagnetic activity and 
                         exceptionally quiet activity showed that SAT-A and Sat-B decayed 
                         by about 1.13 km and 1.27 km, respectively during the former 
                         regime, while the respective decay for the latter regime are 0.16 
                         km and 0.20 km. The respective mean ODR are 101.38 m/day and 
                         113.22 m/day (for elevated activity), and 14.72 m/day and 18.52 
                         m/day (exceptionally quiet). Sat-B has larger values of height 
                         decay (h) and ODR in both regimes, and therefore affected by 
                         atmospheric drag force more than Sat-A, because its ballistic 
                         coefficient is higher. The results of our simulation confirm (i) 
                         the dependence of atmospheric drag force on satellites ballistic 
                         coefficient, and (ii) geomagnetic storms being the leading driver 
                         of large-scale disturbances in the coupled 
                         magnetosphere-ionosphere-thermosphere systems, and consequently 
                         the leading perturber of satellites motion in low Earth orbit. Our 
                         model can be useful for situational awareness and mitigation of 
                         the potential threat posed by solar activity in modulating 
                         satellites trajectories.",
  conference-location = "Ayobo, Nova Yorque",
      conference-year = "18-21 mar.",
                  doi = "10.1109/ICMCECS47690.2020.247003",
                  url = "http://dx.doi.org/10.1109/ICMCECS47690.2020.247003",
                 isbn = "9781728131269",
                label = "lattes: 1272123236892781 8 NwankwoDAAFCRCE:2020:SiAtDr",
             language = "pt",
           targetfile = "nwankwo.pdf",
        urlaccessdate = "27 abr. 2024"
}