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Laser Communication with Alphasat - FD Challenges and First Flight Results

Schlepp, Benjamin and Kahle, Ralph and Saleppico, Juri and Kuhlmann, Sven and Sterr, Uwe (2014) Laser Communication with Alphasat - FD Challenges and First Flight Results. 24th International Symposium on Space Flight Dynamics (ISSFD), 5.-9. Mai 2014, Laurel, MD, USA.

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Inmarsat’s geostationary satellite Alphasat, launched on July 25, 2013, is the largest European telecommunications satellite ever built with a weight of 6.6 tons. For technology demonstration it is carrying different payloads, hereunder the laser communication terminal (LCT) built by Tesat-Spacecom and operated by DLR/GSOC. Its purpose is to establish bidirectional data links with data rates of up to 1.8 Gbit/s. Links can be either within space, so called inter-satellite links (ISL) to counter terminals in low Earth orbit (LEO), or from the geostationary satellite to terminals mounted on ground stations on the Earth’s surface, space-toground links (SGL). This paper gives an overview about the LCT operations aboard Alphasat and its counter terminals. The corresponding work flow from visibility computations over link scheduling until command generation is described. Furthermore, it provides a deeper insight into the flight dynamics tasks that comes along with the operations of an LCT, such as visibility calculations and pointing performance analysis. The results of the first successfully performed links are presented.

Item URL in elib:https://elib.dlr.de/89226/
Document Type:Conference or Workshop Item (Speech)
Title:Laser Communication with Alphasat - FD Challenges and First Flight Results
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Schlepp, Benjaminbenjamin.schlepp (at) dlr.deUNSPECIFIED
Kahle, Ralphralph.kahle (at) dlr.deUNSPECIFIED
Saleppico, Jurijuri.saleppico (at) dlr.deUNSPECIFIED
Kuhlmann, Svensven.kuhlmann (at) dlr.deUNSPECIFIED
Sterr, UweST²C Satellite Telecommunication ConsultingUNSPECIFIED
Date:May 2014
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Keywords:Alphasat, Laser Communication, Attitude Dynamics, Flight Dynamics Operations
Event Title:24th International Symposium on Space Flight Dynamics (ISSFD)
Event Location:Laurel, MD, USA
Event Type:international Conference
Event Dates:5.-9. Mai 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:other
DLR - Research area:Raumfahrt
DLR - Program:R - no assignment
DLR - Research theme (Project):R - no assignment
Location: Oberpfaffenhofen
Institutes and Institutions:Space Operations and Astronaut Training > Space Flight Technology
Deposited By: Schlepp, Benjamin
Deposited On:26 May 2014 11:32
Last Modified:31 Jul 2019 19:46

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