Ara es mostren els items 21-40 de 50

    • Initial orbit determination and satellite tracking using optical observations 

      Aizcorbe Rodriguez, Carlos (Universitat Politècnica de Catalunya, 2021-07-15)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   Xīběi Gōngyè Dàxué
      The 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 

      Altmeyer, Sebastian Andreas; Hof, Björn (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 

      Barrabés Vera, Esther; Cors Iglesias, Josep Maria; Pinyol Pérez, Conxita; Soler Villanueva, Jaume (2008-01)
      Article
      Accés obert
      The 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 

      Pérez, Daniel; Masdemont Soler, Josep; Gómez Muntané, Gerard (2013)
      Text en actes de congrés
      Accés obert
      In 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 

      Peng, Hao; Bai, Xiaoli; Masdemont Soler, Josep; Gómez Muntané, Gerard; Xu, Shijie (2017-01-01)
      Article
      Accés obert
      Copyright © 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 

      Araguz López, Carles; Llaveria Godoy, David; Lancheros Sepulveda, Estefany Maria; Bou Balust, Elisenda; Camps Carmona, Adriano José; Alarcón Cot, Eduardo José; Lluch, I.; Matevosyan, H.; Golkar, Alessandro; Tonetti, Stefania; Cornara, Stefania; Pierotti, S.; Rodríguez Mondelo, Pedro Manuel; Alvaro Sanchez, A.; Narkiewicz, J. (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Satellite 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 

      Martínez Galisteo, María (Universitat Politècnica de Catalunya, 2021-09-08)
      Treball Final de Grau
      Accés obert
      The 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 

      Clotet Juan, Josep; García Planas, María Isabel (1999)
      Article
      Accés obert
      Let 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 

      Guàrdia Munarriz, Marcel; Martín, Pau; Sabbagh, Lara; Martínez-Seara Alonso, M. Teresa (Southwest Missouri State University, 2017-01-01)
      Article
      Accés obert
      The 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 

      Dominguez Figueroa, Cristian Andres (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 

      Fantino, Elena; Flores Le Roux, Roberto Maurice; Peláez Álvarez, Jesús; Raposo-Pulido, Virginia (American Institute of Aeronautics and Astronautics, 2020-02-17)
      Article
      Accés obert
      Orbit 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 

      Torre Sangrà, David de la; Fantino, Elena (2015)
      Comunicació de congrés
      Accés obert
      Lambert’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 

      Fejoz, J.; Guàrdia Munarriz, Marcel (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 

      Guitart Rosselló, Irene (Universitat Politècnica de Catalunya, 2020-01-15)
      Treball Final de Grau
      Accés obert
      El 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 

      Stefania, Soldini; Gómez Muntané, Gerard; Masdemont Soler, Josep; Camilla, Colombo; Walker, Scott (2016)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This 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 

      Duan, Xun; Gómez Muntané, Gerard; Masdemont Soler, Josep; Xiaokui, Yue (2018)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This 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 

      Gómez Muntané, Gerard; Noguera Batlle, Miquel (1984)
      Report de recerca
      Accés obert
      In 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 

      Rodríguez del Río, Óscar; Gronchi, Giovanni F.; Baù, Giulio; Jedicke, Robert (2024-04)
      Article
      Accés obert
      We 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 

      Barrabés Vera, Esther; Cors Iglesias, Josep Maria; Vidal Díaz, Claudio (2017-09-01)
      Article
      Accés obert
      We 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 

      Nicolás Álvarez, Jorge; Carreño Megias, Xavier; Fusté, Oriol; Ferrer Torres, Estel; Albert Gali, Miquel; Amlou, Anas; Aguasca Solé, Alberto; Broquetas Ibars, Antoni (Institute of Electrical and Electronics Engineers (IEEE), 2021)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The 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. ...