Results 11 to 20 of about 9,161,553 (268)

An aerostable drag-sail device for the deorbit and disposal of sub-tonne, low earth orbit spacecraft [PDF]

open access: yes, 2006
There is an increasing amount of debris in low Earth orbit arising from the disintegration and collision of old spacecraft which have not been removed from orbit. A ‘bolt-on’ deorbit device to be attached to new spacecraft is therefore proposed, which
Harkness, Patrick George
core   +7 more sources

Design of optimal Earth pole-sitter transfers using low thrust propulsion [PDF]

open access: yes, 2011
Recent studies have shown the feasibility of an Earth pole-sitter mission using low-thrust propulsion. This mission concept involves a spacecraft following the Earth's polar axis to have a continuous, hemispherical view of one of the Earth's poles.
Biggs, James   +9 more
core   +4 more sources

Drag Sail Conceptual Design for Satellite Orbit Reduction in Low Earth Orbit [PDF]

open access: yesفناوری در مهندسی هوافضا, 2021
The main purpose of this paper is to provide a regular design process of drag sail for deorbiting a satellite in LEO orbit concerning the mission requirements. In this regard, the design requirements and manufacturing considerations of the drag sail have
Ali Kasiri   +2 more
doaj   +1 more source

A frequency portrait of Low Earth Orbits [PDF]

open access: yesCelestial Mechanics and Dynamical Astronomy, 2019
30 pages, 31 ...
Schettino, Giulia   +3 more
openaire   +4 more sources

Fuel Optimization for Low Earth Orbit Maintenance [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2008
The resolution of Earth images taken from a satellite has close relation with satellite's altitude. If a satellite has lower altitude, it gets a picture having better resolution.
Yong Jae Park   +3 more
doaj   +1 more source

Design of optimal Earth pole-sitter transfers using low-thrust propulsion [PDF]

open access: yes, 2012
Recent studies have shown the feasibility of an Earth pole-sitter mission using low-thrust propulsion. This mission concept involves a spacecraft following the Earth's polar axis to have a continuous, hemispherical view of one of the Earth's poles.
Biggs, James   +3 more
core   +2 more sources

Analysis on the coverage performance and networking scheme of an MEO constellation

open access: yesDianxin kexue, 2022
Geostationary earth orbit (GEO) satellite orbit position resources have been scarce for a long time.The development of giant low-orbit satellite constellations has made the low-orbit resources unprecedentedly scarce.As a compromise between GEO and low ...
Yanbin ZHAO, Renning WANG, Peipei HU
doaj   +2 more sources

Self-organising low Earth orbit constellations for Earth observation [PDF]

open access: yes, 2014
This paper presents a novel method of manipulating the spatial pattern of a fractionated micro-satellite constellation in Low Earth Orbit. The method developed allows satellites to manipulate the longitudinal position of their ground-tracks over the ...
McInnes, Colin, Mushet, Garrie
core   +4 more sources

The benefits of very low earth orbit for earth observation missions [PDF]

open access: yesProgress in Aerospace Sciences, 2020
23 pages, 19 figures. Accepted for publication in Progress in Aerospace Sciences (24-04-2020)
Crisp, N.H.   +32 more
openaire   +8 more sources

GPS-SBAS-Based Orbit Determination for Low Earth Orbiting Satellites

open access: yesInternational Journal of Aerospace Engineering, 2023
A space-based augmentation system (SBAS) provides real-time GNSS correction signals via geostationary satellites for near-ground GNSS users. To use the SBAS correction for low Earth orbit (LEO) satellites, the correction, especially the ionosphere ...
Mingyu Kim, Jeongrae Kim
doaj   +1 more source

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