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dc.contributor.authorCrisp, Nicholas H.
dc.contributor.authorMcGrath, Ciara N.
dc.contributor.authorRoberts, Peter C.E
dc.contributor.authorGarcía-Almiñana, Daniel
dc.contributor.authorRodríguez Donaire, Silvia
dc.contributor.authorSureda Anfres, Miquel
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria de Projectes i de la Construcció
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Organització d'Empreses
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament de Física
dc.date.accessioned2022-10-14T11:03:31Z
dc.date.issued2022
dc.identifier.citationCrisp, N. [et al.]. Very low Earth orbit constellations for Earth observation. A: International Astronautical Congress. "Proceedings of the 73rd International Astronautical Congress". International Astronautical Federation, 2022, p. 1-12. ISBN 0074-1795.
dc.identifier.isbn0074-1795
dc.identifier.urihttp://hdl.handle.net/2117/374440
dc.description.abstractVery Low Earth Orbits (VLEOs), those below 450 km, present a number of benefits and challenges for the development and operation of Earth observation spacecraft at both the system and mission level. This paper examines the design of constellations of satellites for operation in VLEO for Earth observation considering both system and mission level trade-offs. The resulting analysis identifies general design trends and proposes suitable mission architectures for Earth observation from VLEO. The principal benefit for satellites operating in VLEO is that the reduction in the distance to the Earth’s surface allows better imaging resolution to be achieved using smaller and less powerful payloads. This has corresponding benefits for the system mass and cost. However, the sustained and controlled operation of spacecraft in VLEO is challenging due to the increased atmospheric density at these altitudes, which increases propulsive and attitude control requirements. Technologies to facilitate the commercially viable operation of spacecraft in VLEO are currently being developed, for example materials to facilitate drag-reduction and aerodynamic control and atmosphere-breathing electric propulsion systems (ABEP), each of which influence the design of other sub-systems, requiring, for example, varying levels of power or new geometric considerations. At the mission level, the reduction in altitude has a generally negative influence on the coverage and revisit characteristics of a given satellite. However, deployment of these satellites in constellations can provide improvements in the overall system metrics. Systems operating in VLEO may also benefit from improved launch vehicle capability and assured end-of-life deorbit. It is clear, therefore, that important and non-intuitive trade-offs between the satellite platform design, constellation configuration, and total cost arise in the design of these systems. This paper uses combined platform-level system modelling and mission analysis to explore the design of constellations of satellites in VLEO for Earth observation and demonstrates the necessity of a holistic approach to mission and system design when considering operations in VLEO.
dc.format.extent12 p.
dc.language.isoeng
dc.publisherInternational Astronautical Federation
dc.subjectÀrees temàtiques de la UPC::Aeronàutica i espai::Astronàutica
dc.subjectÀrees temàtiques de la UPC::Enginyeria de la telecomunicació::Radiocomunicació i exploració electromagnètica::Satèl·lits i ràdioenllaços
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshArtificial satellites in remote sensing
dc.subject.otherVery-low Earth orbit
dc.subject.otherEarth observation
dc.subject.otherSatellite constellations
dc.subject.otherSystem modelling
dc.titleVery low Earth orbit constellations for Earth observation
dc.typeConference report
dc.subject.lemacSatèl·lits artificials en teledetecció
dc.contributor.groupUniversitat Politècnica de Catalunya. TUAREG - Turbulence and Aerodynamics in Mechanical and Aerospace Engineering Research Group
dc.contributor.groupUniversitat Politècnica de Catalunya. L'AIRE - Laboratori Aeronàutic i Industrial de Recerca i Estudis
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://iafastro.directory/iac/proceedings/IAC-22/
dc.rights.accessRestricted access - publisher's policy
local.identifier.drac34246705
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/737183/EU/DISCOVERER – DISruptive teChnOlogies for VERy low Earth oRbit platforms/DISCOVERER
dc.date.lift10000-01-01
local.citation.authorCrisp , N.; McGrath, C.; Roberts, P.; Garcia-Almiñana, Daniel; Rodriguez-Donaire, S.; Sureda, M.
local.citation.contributorInternational Astronautical Congress
local.citation.publicationNameProceedings of the 73rd International Astronautical Congress
local.citation.startingPage1
local.citation.endingPage12


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