رسالة جامعية
Dynamical evolution of artificial satellites and space debris in near earth region ; Δυναμική εξέλιξη τεχνητών δορυφόρων και διαστημικών καταλοίπων (space debris) στην περιοχή της γης
| العنوان: | Dynamical evolution of artificial satellites and space debris in near earth region ; Δυναμική εξέλιξη τεχνητών δορυφόρων και διαστημικών καταλοίπων (space debris) στην περιοχή της γης |
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| المؤلفون: | Skoulidou, Despoina, Σκουλίδου, Δέσποινα |
| بيانات النشر: | Aristotle University Of Thessaloniki (AUTH) Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ) |
| سنة النشر: | 2019 |
| المجموعة: | National Archive of PhD Theses (National Documentation Centre Greece) |
| مصطلحات موضوعية: | Τροχιακή μηχανική, Τεχνητοί δορυφόροι, Διαστημικά κατάλοιπα, Εγγύς διαστημικό περιβάλλον, Orbital mechanics, Artificial satellites, Space debris, Near earth space environment, Φυσικές Επιστήμες, Φυσική, Natural Sciences, Physical Sciences |
| الوصف: | In this study, we perform a complete, dynamical cartography of the dynamics of satellites and space debris in the near Earth space, by using detailed numerical simulations. The aim of this study is the investigation of natural reentry highways in the Earth's atmosphere that could be used for passive space debris mitigation, and the deeper understanding of the dynamics of the region. For the detailed cartography of the circumterrestrial phase space the numerical propagation and analysis of millions of fictitious orbits is necessary, using a suitable dynamical model that considers the main physics that affect satellites (Earth oblateness, lunisolar perturbations, solar radiation pressure, and atmospheric drag). We present the most complete to date dynamical atlas of the entire usable circumterrestrial space in orbital elements (a, e, i), characterizing the long-term dynamical behavior of Earth satellites from LEO to GEO and beyond. We find that the circumterrestrial space is smooth for low and high inclinations, but the most interesting and complex dynamical behavior appears for moderate-to-high inclinations, due to the overlapping of the lunisolar resonances. When augmented area-to-mass ratio values are assumed, useful dynamical hatches appear close to the upper limit of LEO protected region, which could be considered in designing disposal strategies. A more detailed study in the GTO regime shows that there is strong dependence on initial perigee altitude, as also on the area-to-mass value and drag, especially in low inclinations. The more detailed study around the MEO/GNSS regime, shows that the number of reentry solutions seems to maximize around three particular inclination zones (around i=46, 56, and 68deg), and the mean dynamical lifetime (i.e., the time span needed to reach at Earth's surface) of reentry orbits minimizes. Additionally, a dedicated study for the graveyard regions around the four GNSS constellations reveals that around 13-20% of the initial population is stable for at least 200yr. Finally, we ... |
| نوع الوثيقة: | doctoral or postdoctoral thesis |
| اللغة: | English |
| العلاقة: | http://hdl.handle.net/10442/hedi/46490Test |
| DOI: | 10.12681/eadd/46490 |
| الإتاحة: | https://doi.org/10.12681/eadd/46490Test http://hdl.handle.net/10442/hedi/46490Test |
| حقوق: | BY_NC_SA |
| رقم الانضمام: | edsbas.7EF650CF |
| قاعدة البيانات: | BASE |
| DOI: | 10.12681/eadd/46490 |
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