Results 41 to 50 of about 2,155,828 (298)
The azimuthal extent of three flux transfer events [PDF]
Annales Geophysicae, 2008 In early 2006, the Cluster spacecraft crossed the dayside magnetopause twice each orbit with the spacecraft at their largest separation of the entire mission (~10 000 km).
R. C. Fear +5 more
doaj +1 more source
Statistical behavior of foreshock Langmuir waves observed by the Cluster wideband data plasma wave receiver [PDF]
Annales Geophysicae, 2004 We present the statistics of Langmuir wave amplitudes in the Earth's foreshock using Cluster Wideband Data (WBD) Plasma Wave Receiver electric field waveforms from spacecraft 2, 3 and 4 on 26 March 2002.
K. Sigsbee +5 more
doaj +1 more source
International Journal of Satellite Communications and Networking, Volume 41, Issue 1, Page 82-97, January/February 2023., 2023 This paper analyzes which constellation characteristics provide the best global coverage at the lowest operational cost. Our analysis has found that geostationary and medium Earth orbit satellite constellations have the highest likelihood of profitability. LEO networks are more expensive, but if designed wisely, they can be competitive.
Inigo del Portillo +3 more
wiley +1 more source
Cusp structures: combining multi-spacecraft observations with ground-based observations [PDF]
Annales Geophysicae, 2003 Recent simultaneous observations of cusp structures with Polar, FAST and Interball revealed remarkably similar features at spacecraft crossing the cusp. Such stable cusp structures could be observed up to several hours only during stable solar wind
K. J. Trattner +19 more
doaj +1 more source
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
openaire +2 more sources
Comparison of multi-point measurements of current sheet structure and analytical models [PDF]
Annales Geophysicae, 2008 Current density profiles of 22 thin current sheets, crossed by four Cluster spacecraft in the magnetotail are compared with the self-consistent model of anisotropic 1-D equilibrium, including several species of quasi-adiabatic (transient) ions and ...
A. V. Artemyev +9 more
doaj +1 more source
An Integrated Nonlinear Analysis (INA) Software for Space Plasma Turbulence
Earth and Space Science, 2023 We built an integrated nonlinear analysis software (INA)‐designed to study space plasma turbulence and intermittency. The MATLAB programming environment was used for the algorithmic development and implementation of methods for spectral analysis ...
Costel Munteanu +2 more
doaj +1 more source
A search for Planet Nine with small spacecraft:Three-body, post-Newtonian, non-gravitational, planetary and Kuiper Belt effects [PDF]
Acta Astronautica 225, (2024), Pages 444-453, 2023 A hypothetical gravitating body in the outer Solar System, the so-called Planet Nine, was proposed to explain the unexpected clustering of the Kuiper Belt Objects. As it has not been observed via telescopes, it was conjectured to be a primordial black hole (of the size of a quince) that could be gravitationally detected by laser-launching or solar ...
arxiv +1 more source
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
openalex +5 more sources
Dynamical processes in space: Cluster results [PDF]
Annales Geophysicae, 2013 After 12 years of operations, the Cluster mission continues to successfully fulfil its scientific objectives. The main goal of the Cluster mission, comprised of four identical spacecraft, is to study in three dimensions small-scale plasma structures ...
C. P. Escoubet +6 more
doaj +1 more source