Exploració per tema "Earth (Planet)--Orbit"
Ara es mostren els items 1-7 de 7
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A review of gas-surface interaction models for orbital aerodynamics applications
(2020-11)
Article
Accés obertRenewed interest in Very Low Earth Orbits (VLEO) - i.e. altitudes below 450 km - has led to an increased demand for accurate environment characterisation and aerodynamic force prediction. While the former requires knowledge ... -
Dynamical model design and interferometric precise orbit determination for GEOSAR missions
(Universitat Politècnica de Catalunya, 2020-07-20)
Treball Final de Grau
Accés restringit per acord de confidencialitat -
KeyNote: DISCOVERER - Making commercial satellite operations in very low earth orbit a reality
(International Astronautical Federation, 2019)
Text en actes de congrés
Accés restringit per política de l'editorialDISCOVERER is a €5.7M European Commission funded Horizon 2020 project developing technologies to enable commercially-viable sustained-operation of satellites in very low Earth orbits. Why operate closer to the Earth? For ... -
Minimum-fuel escape from two body sun-earth system
(1999)
Article
Accés restringit per política de l'editorialEscaping from the solar system by receiving gravity assist from the Earth is considered in this paper. A simple procedure,which neglects the eccentricity of the Earth’s orbit and uses the two-body problem equations and ... -
Study and design of a business model Canvas for a ground station company
(Universitat Politècnica de Catalunya, 2021-01-10)
Treball Final de Grau
Accés restringit per decisió de l'autorThis thesis addresses the design of a business model for a ground station company focused on the Very Low Earth Orbit (VLEO) market and its Earth Observation (EO) activities. To do so, a thorough study on the current ... -
Study of the viability and competitiveness of Atmosphere-Breathing Electric Propulsion (ABEP) systems for Very Low Earth Orbit (VLEO) missions through the comparative with propulsion systems commonly used today.
(Universitat Politècnica de Catalunya, 2017-06-10)
Treball Final de Grau
Accés restringit per decisió de l'autorThere are a lot of opportunities in the Very Low Earth Orbit (VLEO) market due to a lot of benefits. However, one of the main challenges is the aerodynamic drag resistance, stronger than in any other range of orbits’ ... -
System analysis and test-bed for an atmosphere-breathing electric propulsion system using an inductive plasma thruster
(2017)
Text en actes de congrés
Accés obertChallenging space mission scenarios include those in very low Earth orbits, where the atmosphere creates significant drag to the S/C and forces their orbit to an early decay. For drag compensation, propulsion systems are ...