Results 251 to 260 of about 31,489 (272)
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HIGH PERFORMANCE PROCESSING CLUSTER FOR REMOTE SENSING SPACECRAFTS
Journal of Rocket-Space Technology, 2021Recently, there has been a tendency to complicate real time control algorithms, to process a large amount of information from the satellite payload (optical, radar, communication systems) directly on board and to create highly informative communication lines with both ground stations and other satellites.
Petro Oleksandrovich Zheliabov +2 more
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Basic Study of Spacecraft Plug Cluster Nozzle
47th AIAA/ASME/SAE/ASEE Joint Propulsion Conference & Exhibit, 2011We choose a plug cluster nozzle targeting use with geostationary satellites, from the perspective of installation restrictions on rockets and performance improvement. The flow properties were determined via tests and analysis using a feasibility sample scale model plug cluster nozzle, the expansion area ratio e of which was 150.
Ideo Masuda, Kenichi Kajiwara
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Debris Avoidance Maneuvers for Spacecraft in a Cluster
Journal of Guidance, Control, and Dynamics, 2017Spacecraft formation flying and satellite cluster flight have seen growing interest in the last decade.
Elad Denenberg, Pini Gurfil
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Cluster flight orbit design method for fractionated spacecraft
Aircraft Engineering and Aerospace Technology, 2012PurposeThe purpose of this paper is to propose an intuitive and effective cluster flight orbit design method for fractionated spacecraft.Design/methodology/approachBased on the concept of fractionated spacecraft, orbit design requirements for cluster flight in the case of fractionated spacecraft are proposed, and categorized into three requirements ...
Jihe Wang, Shinichi Nakasuka
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Simulation of the Cluster-Spacecraft Floating Probe Potential
IEEE Transactions on Plasma Science, 2006In this paper, a numerical model of the Cluster-spacecraft electric potential has been developed and validated. This model provides a good fit to the plasma density as a function of spacecraft chassis potential relative to a Langmuir probe as recorded along the Cluster-spacecraft orbit when the plasma density was between 1 and 80 cm -3 during a ...
B. Thiebaultthiebault +4 more
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Analysis of Cluster spacecraft potential during active control
Advances in Space Research, 2005Abstract The floating potential of a spacecraft is determined by an equilibrium between photo-electron emission from the sunlit spacecraft surfaces and the plasma electron current, while other currents play a secondary role. On the Cluster spacecraft, the presence of the experiment ASPOC to control the potential by an ion beam with currents up to ...
Torkar, K. +6 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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Decentralized autonomous planning of cluster reconfiguration for fractionated spacecraft
Acta Astronautica, 2016Abstract Autonomous cluster operation such as cluster reconfiguration is one of the enabling technologies for fractionated spacecraft. By virtue of the multi-agent system theory, this paper presents an organizational architecture for fractionated spacecraft, which not only enables autonomous cluster operations but also facilitates its non-traditional
Jing Chu, Jian Guo, Eberhard Gill
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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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Nursing 4 Cluster Spacecraft with Aging Batteries Through Eclipses
SpaceOps 2008 Conference, 2008The Cluster mission was launched in 2000 to investigate for 3 years the interaction between the solar wind and the Earth magnetosphere. The mission has been extended until end 2009. The batteries of the four spacecraft are well beyond their design life and have started to fail.
Hans-Jürgen Volpp +7 more
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