Research ArticleOpen accessEvery word in the titleLunisolar Invariant Relative OrbitsWalid Ali RahomaThe present study deal with constructing an analytical model within Hamiltonian formulation to design invariant relative orbits due to the perturbation of J2 and the lunisolar attraction. To fade the secular drift separation over the time between two neighboring orbits, two second order conditions that guarantee that drift are derived and enforced to be equal. …American Journal of Applied Sciences, Vol. 10, Issue 4 · 2 Apr 2013 · 6,268 accessesView PDFCite
Review ArticleOpen accessIn the keywordsVery High Resolution Optical Satellites: An Overview of the Most Commonly usedPasquale MaglioneVery High Resolution (VHR) satellite systems are platforms whose sensors acquire high geometric resolution images. Since 1972, when the first satellite was launched (Land sat ERTS), the spatial resolution of the satellite image has increased, making Ground Sample Distance (GSD) reaching 0.30 m at Nadir in panchromatic images. In this paper, after a brief introduction, concepts relative to orbits, types … …American Journal of Applied Sciences, Vol. 13, Issue 1 · 25 Jan 2016 · 9,059 accessesView PDFCite
Research ArticleOpen accessIn the keywordsThe Gravity Field of a CubeJames Michael Chappell, Mark John Chappell, Azhar Iqbal, Derek AbbottWe calculate the Newtonian gravitational potential and field of a cubic, homogeneous asteroid and we apply it to the orbit of possible satellites. Large astronomical objects such as stars or planets, naturally tend to form spherical shapes due to the dominance of the gravitational forces, but as a thought experiment, we consider the properties of a planet in the form … …Physics International, Vol. 3, Issue 2 · 27 Mar 2013 · 15,328 accessesView PDFCite
Research ArticleOpen accessIn the keywordsChaotic Attitude Tumbling of Satellite in Magnetic FieldRashmi Bhardwaj, Parsan KaurIn this study, the half width of the chaotic separatrix has been estimated by chrikov's criterion. Through surface of section method, it has been observed that the magnetic torque parameter, the eccentricity of the orbit and the mass distribution parameter play an important in changing the regular motion into chaotic one. …American Journal of Applied Sciences, Vol. 3, Issue 10 · 31 Oct 2006 · 6,609 accessesView PDFCite
Research ArticleOpen accessIn the abstractMulti-Satellite Custody of Moving Ground TargetsDavid SchusterMaintaining persistent custody of ground targets from Low Earth Orbit (LEO) is a key challenge in space-based surveillance and reconnaissance. Traditional rule-based tasking strategies struggle with scalability as the number of assets and targets grows. In this paper, we present a centralized Reinforcement Learning (RL) approach using Proximal Policy Optimization (PPO) to coordinate four LEO satellites tasked with tracking two … …Journal of Computer Science, Vol. 22, Issue 3 · 25 Mar 2026 · 1,575 accessesView PDFCite
Review ArticleOpen accessIn the abstractFishing for “16 Psyche”Relly Victoria Virgil Petrescu16 Psyche is one of the most massive asteroids in the asteroid belt. This object has a diameter of over 200 km and contains about 1% of the mass of the entire asteroid belt. It is believed to be the exposed iron core of a protoplanet and is the most massive metallic M-type asteroid. It was discovered by the Italian … …Journal of Aircraft and Spacecraft Technology, Vol. 4, Issue 1 · 10 Sep 2020 · 8,369 accessesView PDFCite
Research ArticleOpen accessIn the abstractTrajectory Optimization for First Human Asteroid Exploration MissionAtiksha Sharma, Santosh KosambeAfter the successful completion of robotic expeditions on Mars, an ultimate goal was set for space fairing nations and agencies around the world to send astronauts to Mars by 2030. Unfortunately, a mission to Mars would last upwards for years meanwhile several asteroids fly close to the Earth. A manned trip to an asteroid would be a valuable stepping stone … …Journal of Aircraft and Spacecraft Technology, Vol. 4, Issue 1 · 8 Aug 2020 · 6,433 accessesView PDFCite
Review ArticleOpen accessIn the abstractThe TESS Satellite will Search for Planets in the Vicinity of our Solar SystemRelly Victoria Virgil PetrescuThe US Space Agency has launched from Cape Canaveral, Florida, the TESS satellite, which will search for planets near our solar system and study them in detail. "TESS will significantly increase the number of planets studied," said George Ricker of the Massachusetts Institute of Technology, MIT, before launching. "It will double the number of planets we've seen and detected with … …Journal of Aircraft and Spacecraft Technology, Vol. 3, Issue 1 · 23 May 2019 · 6,639 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Note on the Classification of Compact Homogeneous Locally Conformal Kähler ManifoldsDaniel GuanIn this study, we apply a result of H. C. Wang and Hano-Kobayashi on the classification of compact complex homogeneous manifolds with a compact reductive Lie group to give some more homogeneous space involved proofs of recent classification of compact complex homogeneous locally conformal Kähler manifolds. In particular, we prove that the semisimple part S of the Lie group action … …Journal of Mathematics and Statistics, Vol. 13, Issue 3 · 2 Aug 2017 · 9,357 accessesView PDFCite