Results 11 to 20 of about 875,218 (283)
Extension of the sun-synchronous Orbit [PDF]
, 2010 Through careful consideration of the orbit perturbation force due to the oblate nature of the primary body a secular variation of the ascending node angle of a near-polar orbit can be induced without expulsion of propellant.
Bosquillon de Frescheville, Francois +9 more
core +4 more sources
Comparative study on the application of evolutionary optimization techniques to orbit transfer maneuvers [PDF]
, 2008 Orbit transfer maneuvers are here considered as benchmark cases for comparing performance of different optimization techniques in the framework of direct methods. Two different classes of evolutionary algorithms, a conventional genetic algorithm and an
Avanzini, Giulio +3 more
core +8 more sources
Bulk plasma properties at geosynchronous orbit. [PDF]
, 2005 We present a comprehensive study of plasma properties at geosynchronous orbit for electron and ion energies between ∼1 eV and ∼45 keV, between 1990 and 2001.
Liemohn, M. W. +5 more
core +5 more sources
Electrochromic orbit control for smart-dust devices [PDF]
, 2012 Recent advances in MEMS (micro electromechanical systems) technology are leading to spacecraft which are the shape and size of computer chips, so-called SpaceChips, or ‘smart dust devices’.
Colombo, Camilla +3 more
core +4 more sources
Universe, 2023 A review of the basic Hansen’s ideal frame algorithms for accurate numerical integration of perturbed elliptic motion is carried out. The fundamental approaches rely on the use of nonsingular variables and differ in the ways in which the ellipse in the ...
Martin Lara, Hodei Urrutxua
doaj +1 more source
Adaptive scheme for accurate orbit propagation [PDF]
Journal of Aerospace Engineering, Sciences and Applications, 2012 Two extensions of the fast and accurate special perturbation method recently developed by Peláez et al. are presented for respectively elliptic and hyperbolic motion. A comparison with Peláez?s method and with the very efficient Stiefel- Scheifele?s method, for the problems of oblate Earth plus Moon and continuous radial thrust, shows that the new ...
Baù, Giulio +2 more
openaire +3 more sources
Iterative Lambert’s Trajectory Optimization for Extrasolar Bodies Interception
Aerospace, 2021 Interception of extrasolar objects is one of the major current astrophysical objectives since it allows gathering information on the formation and composition of other planetary systems.
Alicia Herrero +4 more
doaj +1 more source
Hybrid SGP4 orbit propagator [PDF]
Acta Astronautica, 2017 18 pages, 4 ...
San-Juan, J.F. +3 more
openaire +4 more sources
Re-entry prediction of objects with low-eccentricity orbits based on mean ballistic coefficients
Open Astronomy, 2020 During re-entry objects with low-eccentricity orbits traverse a large portion of the dense atmospheric region almost every orbital revolution. Their perigee decays slowly, but the apogee decays rapidly. Because ballistic coefficients change with altitude,
Wei Zhang +4 more
doaj +1 more source
Space Weather, 2022 The largest obstacle to managing satellites in low Earth orbit (LEO) is accurately forecasting the neutral mass densities that appreciably impact atmospheric drag.
Nicholas Dietrich +2 more
doaj +1 more source