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From Observational Geometry to Practical Satellite Design: AsteroidFinder/SSB

Grundmann, Jan Thimo and Mottola, Stefano and Baturkin, Volodymyr and Behrens, Jörg and Biering, Bernd and Drentschew, Maximilian and Drobczyk, Martin and Gerené, Sam and Hahn, Gerhard and Hallmann, Marcus and Hartmann, Jens and Heidecker, Ansgar and Kazeminejad, Bobby and Kührt, Ekkehard and Lieder, Matthias and Lötzke, Horst-Georg and Michaelis, Harald and Schlotterer, Markus and Schmitz, Nicole and Siemer, Martin and Spietz, Peter (2009) From Observational Geometry to Practical Satellite Design: AsteroidFinder/SSB. In: IAA WPP-301 - First IAA Planetary Defense Conference - Protecting Earth from Asteroids. ESA. 1st IAA Planetary Defense Conference, 27.-30. Apr. 2009, Granada, Spanien.

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Official URL: http://www.congrex.nl/09c04/

Abstract

DLR has selected AsteroidFinder as the first payload to be flown on its SSB satellite platform, in the frame of the German national Compact Satellite Program. The scientific goal is to better observe and characterize Near-Earth Objects (NEO), particularly the Aten asteroids and the Inner Earth Objects orbiting completely Interior to Earth’s Orbit (IEO). Only ten mostly Aten-like IEOs have been found so far, of which two are Potentially Hazardous Asteroids (PHA). Ground-based observations of Atens and IEOs are severely constrained by the Earth’s body and its atmosphere. An Earth-orbiting survey telescope can in principle evade these constraints with ease, to become an efficient and cost-effective tool to facilitate the discovery and follow-up of these objects. It may however be constrained by other factors specific to its orbital environment. Analysis of the observational geometry and present technological capabilities has shown that stray light from the Sun and Earth is the most critical performance limiter. The thermal influences of both sunlight and earthlight become important if the capabilities of state-of-the-art detectors are to be fully exploited at low temperatures. Thus, the optical and thermal behaviour of the satellite as a system beyond the scientific instrument itself is strongly coupled, through the shape and layout of the satellite and the parameters of the satellite’s orbit, to the observational geometry of the target asteroids, the Earth, and the Sun. Objects within the Earth’s orbit are to be observed in a region of interest continuing sunward from that covered by ground-based surveys to 30° solar elongation. Their identification is accomplished through apparent motion and parallax, requiring repeated observations of the same field which the satellite has to provide at certain intervals. The strong coupling of optical and thermal influences forces system-level optimization of the geometrical layout of the satellite in accordance with survey pointing patterns. This affects the layout of the telescope and the components visible to its aperture, the positioning of several radiators for different temperature levels, the accommodation of antennae for communication, the placement of deployable baffles, sunshields, and solar panels, etc. AsteroidFinder will also test space-based detection of space debris and artificial satellites at different observational attitudes. All this has to be fitted to the limited envelope of a compact class satellite; within the common envelope and power rating of a small household fridge, and no moving parts but one-time deployables. As of December 2008, AsteroidFinder/SSB is in preparation for phase B. Its launch is planned for 2012, for a one-year baseline mission.

Item URL in elib:https://elib.dlr.de/72620/
Document Type:Conference or Workshop Item (Poster)
Title:From Observational Geometry to Practical Satellite Design: AsteroidFinder/SSB
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Grundmann, Jan Thimojan.grundmann (at) dlr.dehttps://orcid.org/0000-0002-8809-0981
Mottola, StefanoUNSPECIFIEDUNSPECIFIED
Baturkin, VolodymyrUNSPECIFIEDUNSPECIFIED
Behrens, JörgEADS Space TransportationUNSPECIFIED
Biering, BerndUNSPECIFIEDUNSPECIFIED
Drentschew, MaximilianUNSPECIFIEDUNSPECIFIED
Drobczyk, MartinDLR e. V.UNSPECIFIED
Gerené, SamJAQAR Concurrent Design Services, Rotterdam, NLUNSPECIFIED
Hahn, GerhardUNSPECIFIEDUNSPECIFIED
Hallmann, MarcusUNSPECIFIEDUNSPECIFIED
Hartmann, JensUNSPECIFIEDUNSPECIFIED
Heidecker, Ansgaransgar.heidecker (at) dlr.dehttps://orcid.org/0000-0002-7483-9074
Kazeminejad, BobbyUNSPECIFIEDUNSPECIFIED
Kührt, EkkehardUNSPECIFIEDUNSPECIFIED
Lieder, MatthiasUNSPECIFIEDUNSPECIFIED
Lötzke, Horst-GeorgUNSPECIFIEDUNSPECIFIED
Michaelis, HaraldUNSPECIFIEDUNSPECIFIED
Schlotterer, MarkusUNSPECIFIEDUNSPECIFIED
Schmitz, Nicolenicole.schmitz (at) dlr.deUNSPECIFIED
Siemer, MartinUNSPECIFIEDUNSPECIFIED
Spietz, PeterUNSPECIFIEDUNSPECIFIED
Date:13 July 2009
Journal or Publication Title:IAA WPP-301 - First IAA Planetary Defense Conference - Protecting Earth from Asteroids
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:ESA
Status:Published
Keywords:AsteroidFinder, Kompaktsatellit, Beobachtungsgeometrie, Asteroidensuche, NEO, IEO, LEO, SSO, space debris, Weltraumschrott, space situational awareness, SSA, Kleinsatellit, planetary defense
Event Title:1st IAA Planetary Defense Conference
Event Location:Granada, Spanien
Event Type:international Conference
Event Dates:27.-30. Apr. 2009
Organizer:IAA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Proj. AsteroidenFinder - Spacebus (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Orbital- und Rueckkehrsysteme
Deposited By: Grundmann, Jan Thimo
Deposited On:14 Feb 2012 17:19
Last Modified:31 Jul 2019 19:33

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