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Jun Li, Linyu Ling, Jun Liao, Zheng Chen and Shibin Luo
During the long-endurance flight of a near-space aerostat, the characteristics of lifting gas diffusion have a great influence on the flight altitude adjustment and station-keeping performance. Thus, in this study, a lifting gas diffusion model and a dyn...
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Dillon O?Reilly, Georg Herdrich and Darren F. Kavanagh
Over 2500 active satellites are in orbit as of October 2020, with an increase of ~1000 smallsats in the past two years. Since 2012, over 1700 smallsats have been launched into orbit. It is projected that by 2025, there will be 1000 smallsats launched per...
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Stoian Borissov, Yunhe Wu and Daniele Mortari
The higher harmonic terms of Earth?s gravitational potential slowly modify the nominal longitude of geostationary Earth orbit (GEO) satellites, while the third-body presence (Moon and Sun) mainly affects their latitude. For this reason, GEO satellites pe...
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