Exploració per tema "Orbits"
Ara es mostren els items 21-40 de 50
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Initial orbit determination and satellite tracking using optical observations
(Universitat Politècnica de Catalunya, 2021-07-15)
Projecte Final de Màster Oficial
Accés restringit per decisió de l'autor
Realitzat a/amb: Xīběi Gōngyè DàxuéThe objective of this project is to propose a passive method for orbit determination (OD) of GEO objects using observational data as position measurements. The proposed method use position measurements expressed as right ... -
Invariant solutions organizing pipe flow turbulence
(American Physical Society (APS), 2017)
Text en actes de congrés
Accés obert -
J2 effect and elliptic inclined periodic orbits in the collision three-body problem
(2008-01)
Article
Accés obertThe existence of a new class of inclined periodic orbits of the collision restricted three{body problem is shown. The symmetric periodic solutions found are perturbations of elliptic kepler orbits and they exist only for ... -
Jet Transport propagation of uncertainties for orbits around the Earth
(2013)
Text en actes de congrés
Accés obertIn this paper we present a tool to study the non-linear propagation of uncertainties for orbits around the Earth. The tool we introduce is known as Jet Transport and allows to propagate full neighborhoods of initial states ... -
Libration transfer design using patched elliptic three-body models and graphics processing units
(2017-01-01)
Article
Accés obertCopyright © 2016 by the American Institute of Aeronautics and Astronautics, Inc. Design of the transfer from lunar orbits to the sun-Earth libration point region by direct searching in the highfidelity ephemeris model is ... -
Optimized model-based design space exploration of distributed multi-orbit multi-platform Earth observation spacecraft architectures
(Institute of Electrical and Electronics Engineers (IEEE), 2018)
Text en actes de congrés
Accés restringit per política de l'editorialSatellite architectures where networked, heterogeneous observation nodes capture data in a distributed manner are seen as feasible solutions to address the needs of next-generation Earth observation services (i.e. higher ... -
Orbit reconstruction using GNSS-derived state vectors
(Universitat Politècnica de Catalunya, 2021-09-08)
Treball Final de Grau
Accés obertThe lower thermosphere (between 100 and 550 km of height) is known with lesser accuracy than desired. The use of spherical satellites to determine the density could result in a substantial improvement of the present ... -
Orbits of controllable and observable systems
(1999)
Article
Accés obertLet a time-invariant linear system $\left .\aligned \dot x(t)&=Ax(t)+Bu(t)\\y(t)&=Cx(t)\endaligned \right \}$ corresponding to a realization of a prescribed transfer function matrix can be represented by triples of ... -
Oscillatory orbits in the restricted elliptic planar three body problem
(Southwest Missouri State University, 2017-01-01)
Article
Accés obertThe restricted planar elliptic three body problem models the motion of a massless body under the Newtonian gravitational force of two other bodies, the primaries, which evolve in Keplerian ellipses. A trajectory is called ... -
Precise orbital tracking of GEOSAR missions using interferometry
(Universitat Politècnica de Catalunya, 2020-07-20)
Treball Final de Grau
Accés restringit per acord de confidencialitat -
Reduction of Saturn orbit insertion impulse using deep-space low thrust
(American Institute of Aeronautics and Astronautics, 2020-02-17)
Article
Accés obertOrbit insertion at Saturn requires a large impulsive manoeuver due to the velocity difference between the spacecraft and the planet. This paper presents a strategy to reduce dramatically the hyperbolic excess speed at ... -
Review of Lambert's problem
(2015)
Comunicació de congrés
Accés obertLambert’s problem is the orbital boundary-value problem constrained by two points and elapsed time. It is one of the most extensively studied problems in celestial mechanics and astrodynamics, and, as such, it has always ... -
Secular instability in the three-body problem
(2016-02-03)
Article
Accés obert© 2016 European Union Consider the three-body problem, in the regime where one body revolves far away around the other two, in space, the masses of the bodies being arbitrary but fixed; in this regime, there are no resonances ... -
Software design for a Cubesat's Orbit Simulator
(Universitat Politècnica de Catalunya, 2020-01-15)
Treball Final de Grau
Accés obertEl proyecto se basa en realizar un software en MATLAB, u otra plataforma a determinar, que integre un simulador de órbitas, que ya se ha desarrollado en un proyecto anterior, en una plataforma de cubesats en el laboratorio, ... -
Solar radiation pressure assisted transfers between Lissajous orbits of the Sun-Earth system
(2016)
Text en actes de congrés
Accés restringit per política de l'editorialThis article investigates a propellant-free transfer between Lissa jous orbits in the Sun-Earth system modelled as a photo-gravitational circular restricted three body p roblem. The geometry of the phase space around the ... -
Solar sail propellant-free transfer maneuvers between libration point orbits around the collinear equilibrium points
(2018)
Text en actes de congrés
Accés restringit per política de l'editorialThis paper investigates propellant-free transfers between lissajous libration point orbits using solar sailing. The dynamical model used is the 3-dimensional Sun–Earth restricted three-body problem, including solar radiation ... -
Some manifolds of periodic orbits in the restricted three body problem
(1984)
Report de recerca
Accés obertIn the present paper we give some numerical results about natural families of periodic orbits, which emanate from limiting orbits around equilateral equilibrium points of the Restricted Three Body Problem, when the mass ... -
Sparse multi-apparition linkages in large datasets
(2024-04)
Article
Accés obertWe present a new procedure to identify observations of known objects in large data sets of unlinked detections. It begins with a Keplerian integrals method that allows us to link two tracklets, computing preliminary orbits, ... -
Spatial collinear restricted four-body problem with repulsive Manev potential
(2017-09-01)
Article
Accés obertWe outline some aspects of the dynamics of an infinitesimal mass under the Newtonian attraction of three point masses in a symmetric collinear relative equilibria configuration when a repulsive Manev potential (-1/r+e/r2 ... -
Station-keeping manoeuvre detection for autonomous precise interferometric tracking of geosynchronous gatellites
(Institute of Electrical and Electronics Engineers (IEEE), 2021)
Comunicació de congrés
Accés restringit per política de l'editorialThe advent of geosynchronous remote sensing missions requires the development of precise orbit determination techniques at high orbits. Geosynchronous satellites require station-keeping manoeuvres to be performed periodically. ...