Results 11 to 20 of about 28,867 (162)
Anisotropic Turbulent Spectra in the Terrestrial Magnetosheath as Seen by the Cluster Spacecraft [PDF]
Physical Review Letters, 2006 Here we report the first three-dimensional spatial spectrum of the low frequency magnetic turbulence obtained from the four Cluster spacecraft in the terrestrial magnetosheath close to the magnetopause. We show that the turbulence is compressible and dominated by mirror structures, its energy is injected at a large scale kp approximately 0.3 (l ...
F. Sahraoui +5 more
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Path Planning of Spacecraft Cluster Orbit Reconstruction Based on ALPIO [PDF]
Remote Sensing, 2022 An adaptive learning pigeon-inspired optimization based on mutation disturbance (ALPIO) is proposed for solving the problems of fuel consumption and threat avoidance in spacecraft cluster orbit reconstruction. First, considering the constraints of maintaining a safe distance between adjacent spacecraft within the spacecraft cluster and of avoiding ...
Bing Hua +3 more
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A Gimballed Control Moment Gyroscope Cluster Design for Spacecraft Attitude Control [PDF]
Aerospace, 2021 This paper addresses the problem of singularity avoidance in a cluster of four Single-Gimbal Control Moment Gyroscopes (SGCMGs) in a pyramid configuration when used for the attitude control of a satellite by introducing a new gimballed control moment gyroscope (GCMG) cluster scheme.
Charalampos Papakonstantinou +2 more
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Construction of small spacecraft clusters [PDF]
Izvestiâ vysših učebnyh zavedenij. Priborostroenie, 2016 V. Yu. Klyushnikov
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Remote sensing of a NTC radio source from a Cluster tilted spacecraft pair [PDF]
Annales Geophysicae, 2013 Abstract. The Cluster mission operated a "tilt campaign" during the month of May 2008. Two of the four identical Cluster spacecraft were placed at a close distance (~50 km) from each other and the spin axis of one of the spacecraft pair was tilted by an angle of ~46°.
P. M. E. Décréau +9 more
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Research on Transmission Capacity Characteristics of the Cluster Flight Spacecraft Network [PDF]
International Journal of Antennas and Propagation, 2021 In order to analyze the transmission capacity performance of the cluster flight spacecraft network, there are two different types of outage performance theory which are derived in this paper. First of all, by applying the mean value theorem of integrals, the expression of the outage probability of decode-and-forward relaying is derived.
Li Su, Jian Wu, Jinrong Mo
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Conjugate observations of quasi‐periodic emissions by Cluster and DEMETER spacecraft [PDF]
Journal of Geophysical Research: Space Physics, 2013 AbstractQuasi‐periodic (QP) emissions are electromagnetic emissions at frequencies of about 0.5–4 kHz that are characterized by a periodic time modulation of the wave intensity. Typical periods of this modulation are on the order of minutes. We present a case study of a large‐scale long‐lasting QP event observed simultaneously on board the DEMETER ...
Michel Parrot +6 more
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A statistical study of magnetospheric electron density using the Cluster spacecraft [PDF]
Journal of Geophysical Research: Space Physics, 2016 AbstractObservations from the WHISPER (Waves of High frequency and Sounder for Probing of Electron density by Relaxation) instrument on board Cluster, for the interval spanning 2001–2012, are utilized to determine an empirical model describing the total electron density along closed geomagnetic field lines.
Tim K. Yeoman +5 more
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Detection of meteoroid hypervelocity impacts on the Cluster spacecraft: First results [PDF]
Journal of Geophysical Research: Space Physics, 2017 AbstractWe present the first study of dust impact events on one of the Earth‐orbiting Cluster satellites. The events were identified in the measurements of the wide band data (WBD) instrument on board the satellite operating in monopole configuration. Since 2009 the instrument is operating in this configuration due to the loss of three electric probes ...
Timo Pitkänen +9 more
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Cluster electron observations of the separatrix layer during traveling compression regions [PDF]
, 2005 [ 1] We present Cluster 4-point observations of electrons during traveling compression regions ( TCRs) on 19 September 2001. The electron and \B\ signatures vary with distance from the plasma sheet, confirming that transient plasma sheet bulges propagate
Balogh, A +4 more
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