Results 121 to 130 of about 2,155,828 (298)

Distributed angle‐only orbit determination algorithm for non‐cooperative spacecraft based on factor graph

IET Radar, Sonar & Navigation
Bayesian filtering provides an effective approach for the orbit determination of a non‐cooperative target using angle measurements from multiple CubeSats.
Zhixun Zhang, Keke Zhang, Leizheng Shu, Zhencai Zhu, Meijiang Zhou   +4 more
doaj   +1 more source

Modulation of NTC frequencies by Pc5 ULF pulsations : experimental test of the generation mechanism and magnetoseismology of the emitting surface [PDF]

, 2009
Nonthermal continuum (NTC) radiation is believed to be emitted by the conversion of an electrostatic wave into an electromagnetic one, which takes place at the Earth's magnetic equator.
Anderson, Balogh, Bernstein, C. Foullon, Calvert, Canu, Cheng, Christiansen, Denton, Décréau, Décréau, Décréau, Engebretson, Eriksson, Etcheto, G. Le Rouzic, Gough, Gough, Gurnett, Gurnett, Gustafsson, Hudson, Hughes, Kasaba, Kennel, Kurth, Kurth, Loewe, Loto'Aniu, Mager, Mann, Melrose, Morgan, Oya, P. M. E. Décréau, Pierrard, Rönnmark, S. Grimald, Schäfer, Singer, Takahashi, Tsyganenko, X. Suraud, X. Vallières   +43 more
core   +2 more sources

Self‐Driving Microscopes: AI Meets Super‐Resolution Microscopy

Small Methods, EarlyView.
This review examines the use of machine learning to automate super‐resolution optical microscopy, enabling the microscope to autonomously make decisions on what, when, and how to image. By eliminating the need for human intervention, this approach has the potential to enhance the versatility and accessibility of super‐resolution microscopy.
Edward N. Ward, Anna Scheeder, Max Barysevich, Clemens F. Kaminski   +3 more
wiley   +1 more source

Coordinated ground-based, low altitude satellite and Cluster observations on global and local scales during a transient post-noon sector excursion of the magnetospheric cusp [PDF]

Annales Geophysicae, 2001
On 14 January 2001, the four Cluster spacecraft passed through the northern magnetospheric mantle in close conjunction to the EISCAT Svalbard Radar (ESR) and approached the post-noon dayside magnetopause over Green-land between 13:00 and 14:00 UT.
H. J. Opgenoorth, H. J. Opgenoorth, M. Lockwood, D. Alcaydé, E. Donovan, M. J. Engebretson, A. P. van Eyken, K. Kauristie, M. Lester, J. Moen, J. Waterman, H. Alleyne, M. André, M. W. Dunlop, N. Cornilleau-Wehrlin, A. Masson, A. Fazerkerley, H. Rème, R. André, O. Amm, A. Balogh, R. Behlke, P. L. Blelly, H. Boholm, E. Borälv, J. M. Bosqued, S. Buchert, M. Candidi, J. C. Cerisier, C. Cully, C. Cully, W. F. Denig, P. Eglitis, R. A. Greenwald, B. Jackal, J. D. Kelly, I. Krauklis, G. Lu, I. R. Mann, M. F. Marcucci, I. W. McCrea, M. Maksimovic, S. Massetti, P. M. E. Décréau, D. K. Milling, S. Orsini, F. Pitout, F. Pitout, G. Provan, J. M. Ruohoniemi, J. C. Samson, J. J. Schott, F. Sedgemore-Schulthess, R. Stamper, P. Stauning, A. Strømme, M. Taylor, A. Vaivads, J. P. Villain, I. Voronkov, J. A. Wild, M. Wild   +61 more
doaj   +1 more source

Next‐Generation Solar‐Powering: Photonic Strategies for Earth and Space Systems

Solar RRL, EarlyView.
Key performance indicators (KPIs) for space or Earth photovoltaic systems and photonic strategies to enhance them are studied. The figure illustrates critical KPIs—efficiency, stability, cost, adaptability, and scalability—for space (top) and terrestrial (bottom) systems, showcasing how photonic strategies address unique challenges and improve ...
Ivan M. Santos, Miguel Alexandre, António T. Vicente, Cristina Teixeira, Eva Almeida, Elvira Fortunato, Rodrigo Martins, Hugo Águas, Manuel J. Mendes   +8 more
wiley   +1 more source

Four-point high time resolution information on electron densities by the electric field experiments (EFW) on Cluster [PDF]

Annales Geophysicae, 2001
For accurate measurements of electric fields, spherical double probes are electronically controlled to be at a positive potential of approximately 1 V relative to the ambient magnetospheric plasma.
A. Pedersen, P. Décréau, C.-P. Escoubet, G. Gustafsson, H. Laakso, P.-A. Lindqvist, B. Lybekk, A. Masson, F. Mozer, A. Vaivads   +9 more
doaj   +1 more source

Observation of an MHD Alfvén vortex in the slow solar wind [PDF]

, 2016
In the solar wind, magnetic field power spectra usually show several power-laws. In this paper, magnetic field data from the Cluster mission during an undisturbed interval of slow solar wind is analyzed at 0.28Hz, near the spectral break point between the ion inertial and dissipation/dispersion ranges.
arxiv   +1 more source

Navigating the Golden Triangle: The Need to Jointly Consider Modularization and Interface Choices When Making Performance, Cost, and Schedule Tradeoffs for Complex System Development

Systems Engineering, EarlyView.
ABSTRACT Decomposition is a critical enabler of complex system development, as it enables both task specialization and efficiency through parallel work. The process of decomposing involves partitioning system parameters into tightly coupled modules and managing any cross‐module coupling by designing passive interfaces or through active coordination.
Taylan G. Topcu, Zoe Szajnfarber
wiley   +1 more source

Cluster: A fleet of four spacecraft to study plasma structures in three dimensions [PDF]

The four Cluster spacecraft are spin stabilized spacecraft which are designed and built under stringent requirements as far as electromagnetic cleanliness is concerned.
Goldstein, M. L., Schmidt, R.
core   +1 more source

North-south asymmetries in cold plasma density in the magnetotail lobes: Cluster observations [PDF]

, 2017
In this paper, we present observations of cold (0-70 eV) plasma density in the magnetotail lobes. The observations and results are based on 16 years of Cluster observation of spacecraft potential measurements converted into local plasma densities.
arxiv   +1 more source