Results 41 to 50 of about 24,888 (220)
Velocity field of image points in satellite imagery of planet’s surface
Российский технологический журнал, 2020 This paper derives a formula for calculating the velocity of arbitrary point in the field of view of the satellite camera in the process of orbital imagery of the planet's surface. The formula describes the velocity as a function of the point coordinates
V. Ya. Gecha +5 more
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Satellite Reentry Predictions During Sudden Stratospheric Warmings
Space Weather, Volume 24, Issue 4, April 2026.Abstract Prediction of uncontrolled satellite reentry time and trajectory are essential to avoid damages to human being and properties over land. Reentry time and trajectory are largely controlled by aerodynamic drag and mass neutral density below 200 km.
Jia Yue +6 more
wiley +1 more source
Rendezvous Strategies in the Vicinity of Earth-Moon Lagrangian Points
Frontiers in Astronomy and Space Sciences, 2019 In the context of Human Spaceflight exploration mission scenario, with the Lunar Orbital Platform- Gateway (LOP-G) orbiting about Earth-Moon Lagrangian Point (EML), Rendezvous and Docking (RVD) operational activities are mandatory and critical for the ...
Stephanie Lizy-Destrez +7 more
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Equatorial circular orbits in Kerr–Newman–de Sitter spacetimes
European Physical Journal C: Particles and Fields, 2020 Circular motion of test particles in the equatorial plane of the Kerr–Newman–de Sitter (KNdS) spacetime is analyzed for both black-hole and naked-singularity backgrounds.
Petr Slaný, Zdeněk Stuchlík
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International Mathematical Forum, 2013 In this note, Kepler’s elliptical planetary orbit is generalized by Newton’s revolving orbit method. Kepler’s conclusion is verified by some boundary condition.
D. Toyoda, M. Kanehira, H. Nakazato
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On Local Normability of Spaces of Keplerian Orbits [PDF]
Vestnik St. Petersburg University, Mathematics, 2019 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources
Gravitational radiation timescales for extreme mass ratio inspirals
, 2005 The capture and inspiral of compact stellar masses into massive black holes is an important source of low-frequency gravitational waves (with frequencies of ~1-100mHz), such as those that might be detected by the planned Laser Interferometer Space ...
Daniel J. Kennefick +3 more
core +3 more sources
Asteroid resource map for near-Earth space [PDF]
, 2011 Most future concepts for the exploration and exploitation of space require a large initial mass in low Earth orbit. Delivering this required mass from the Earth’s surface increases cost due to the large energy input necessary to move mass out of the ...
McInnes, Colin +1 more
core +1 more source
Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light
Advanced Functional Materials, Volume 36, Issue 23, 19 March 2026.A passive upconversion imaging system enables the observation of scenes illuminated by low‐intensity incoherent near‐infrared light from 750 to 930 nm, by converting it into the visible without the use of external power. The upconverter is enabled by triplet–triplet annihilation in a bulk heterojunction, with absorption enhanced by plasmonic resonators
Rabeeya Hamid +13 more
wiley +1 more source
Beyond Point Masses. V. Weywot’s Non-Keplerian Orbit
The Planetary Science JournalWe present a detailed dynamical analysis of the Quaoar–Weywot system based on nearly 20 yr of high-precision astrometric data, including new Hubble Space Telescope observations and stellar occultations.
Benjamin Proudfoot +3 more
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