Results 211 to 220 of about 2,061,225 (235)
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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 ...
K. Torkar +6 more
semanticscholar +3 more sources
Physical Review Letters, 2008
We study the plasma turbulence, at scales larger than the ion inertial length scale, downstream of a quasiparallel bow shock using Cluster multispacecraft measurements. We show that turbulence is intermittent and well described by the extended structure function model, which takes into account the spatial inhomogeneity of the cascade rate.
E. Yordanova +4 more
semanticscholar +3 more sources
We study the plasma turbulence, at scales larger than the ion inertial length scale, downstream of a quasiparallel bow shock using Cluster multispacecraft measurements. We show that turbulence is intermittent and well described by the extended structure function model, which takes into account the spatial inhomogeneity of the cascade rate.
E. Yordanova +4 more
semanticscholar +3 more sources
Initial results of a survey of equatorial noise emissions observed by the Cluster spacecraft
Planetary and Space Science, 2005Abstract Initial results of a survey of equatorial noise emissions are presented. These plasma wave emissions are observed in the inner magnetosphere close to the geomagnetic equator at frequencies below the local lower hybrid frequency. We use the data recorded by the four Cluster spacecraft during the first 24 months of measurements.
F. Němec +5 more
semanticscholar +5 more sources
CLUSTER spacecraft observation of a thin current sheet at the Earth’s magnetopause
Advances in Space Research, 2006Abstract On March 30, 2002 within 17 min the four CLUSTER spacecraft crossed the Earth’s high-latitude magnetopause three times. We found that all three magnetopause current sheets are nearly co-planar on the scales of the CLUSTER spacecraft separation.
E. Panov +9 more
semanticscholar +3 more sources
Transactions of the Institute of Measurement and Control, 2023
This paper investigates the issue of robust relative orbit synchronization control for spacecraft cluster subjects to space perturbation. First, the relative orbit dynamics of the leader-follower spacecraft cluster is established.
Qingxian Jia +3 more
semanticscholar +1 more source
This paper investigates the issue of robust relative orbit synchronization control for spacecraft cluster subjects to space perturbation. First, the relative orbit dynamics of the leader-follower spacecraft cluster is established.
Qingxian Jia +3 more
semanticscholar +1 more source
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.
Kenichi Kajiwara, Ideo Masuda
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Nodal distance distributions in cluster flight spacecraft network
Mathematical Methods in the Applied Sciences, 2020The high‐speed flight of cluster flight spacecraft modules increases the uncertainty of network topology. In order to better design the orbital of the cluster flight spacecraft and improve the performance of cluster flight spacecraft network (CFSN), this paper studies the nodal distance distributions (NDDs).
Jinrong Mo +4 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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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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Feasibility checks and control laws for reconfigurations of spacecraft clusters
2012 American Control Conference (ACC), 2012A multi-spacecraft system consists of wirelessly-connected spacecraft that share resources in Earth orbit or deep space. One of the enabling technologies of such a fractionated space architecture is cluster flight, which provides the cluster with the capability to perform a cluster scatter and regather maneuvers to rapidly evade debris-like threats or ...
Mehran Mesbahi +2 more
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