Results 221 to 230 of about 2,061,225 (235)
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Cluster flight control for fractionated spacecraft on an elliptic orbit
Celestial Mechanics and Dynamical Astronomy, 2016This paper deals with the stabilization of cluster flight on an elliptic reference orbit by the Hamiltonian structure-preserving control using the relative position measurement only. The linearized Melton’s relative equation is utilized to derive the controller and then the full nonlinear relative dynamics are employed to numerically evaluate the ...
Yuying Liang +3 more
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Spacecraft Recognition in Co-Located Satellites Cluster Through Optical Measures
IEEE Transactions on Aerospace and Electronic Systems, 2017The optical orbit determination is one of the most important ways for noncooperative object tracking. One of the main problems with noncooperative object tracking is its recognition through different nights. In this study, the conditions that ensure the recognition of a geostationary satellite inside a cluster were assessed through a hard real case ...
Scire, Gioacchino +2 more
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A survey of autonomous cooperation of modules' cluster operations for fractionated spacecraft
International Journal of Space Science and Engineering, 2013Autonomous cooperation is recognised as the key technology to enable modules’ cluster operations of fractionated spacecraft. This paper presents a thorough survey of the technologies that facilitate the desired autonomous cooperation of fractionated spacecraft.
Jing Chu, Eberhard Gill, Jian Guo
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Bifurcated Current Sheet Structure in a Quiet Time by Cluster Spacecrafts
Chinese Physics Letters, 2006We analyse the vertical structure of the magnetotail current sheet for two time intervals during which the Cluster spacecrafts crossed the neutral sheet in a quiet time. In the intervals, the current sheet moved slowly, and the value of the AE index was relatively small, about 40–130 nT.
LI Zhong-yuan +3 more
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Statistical study of lion roar emissions observed by the cluster spacecraft
2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS), 2014Lion roars are intense narrow-band whistler-mode emissions with typical frequencies about 100 Hz. They are frequently occurring in the Earth's magnetosheath. They are thought to be generated by local electron temperature instabilities. The four CLUSTER spacecraft allow us to study the Earth's magnetospehere and its interaction with the solar wind in ...
Jan Soucek +2 more
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Explicit Dipole Trajectory Solution for Electromagnetically Controlled Spacecraft Clusters
Journal of Guidance, Control, and Dynamics, 2010Satellite formation flight is a much-anticipated technology for future space-science missions, such as high-resolution space-based telescopes. A potentially enabling technology under development allows clusters of spacecraft to maneuver without the use of propellant, instead using electromagnetic control of the relative degrees of freedom within the ...
Samuel A. Schweighart +1 more
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Dynamics, Distributed Control and Autonomous Cluster Operations of Fractionated Spacecraft
2015Chair of Space Systems Engineering, Department of Space ...
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IEEE Transactions on Plasma Science, 2015
K. Torkar, R. Nakamura, M. Andriopoulou
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K. Torkar, R. Nakamura, M. Andriopoulou
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Cluster Multiple Spacecraft Per Aperture operations [PDF]
SpaceOps 2016 Conference, 2016 openaire +1 more source