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SPACE COMMUNICATIONS PROTOCOLS FOR FUTURE OPTICAL SATELLITE-DOWNLINKS

Giggenbach, Dirk and Moll, Florian and Fuchs, Christian and de Cola, Tomaso and Mata-Calvo, Ramon (2011) SPACE COMMUNICATIONS PROTOCOLS FOR FUTURE OPTICAL SATELLITE-DOWNLINKS. 62nd International Astronautical Congress, 3.Okt - 7.Okt 2011, Cape Town, South Africa.

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Abstract

As telemetry downlink data rates from EO-satellites increase and available radio frequency transmission spectrum narrows, optical data downlinks based on directed modulated laser sources become a beneficial alternative. While solving the bottleneck of data rate by providing licensing-free transmission at up to multi-Gigabit per second data rates, the required onboard terminal hardware is at the same time small and uses low transmit power. However, the transmission channel is very different to RF downlinks as new atmospheric effects have to be regarded, mainly cloud blockage, increased attenuation at low elevations, and index of refraction turbulence. To enable also with optical downlinks the level of global cooperation prevailing in RF downlink operations, it is necessary to elaborate and standardize optimized optical transmission formats. We present here the characteristics of optical LEO downlinks and the requirements they impose on the transmission data formats and protocols. We consider how existing RF satellite transmission-securing formats can be adopted and extended to enable reliable and efficient optical downlinks.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:SPACE COMMUNICATIONS PROTOCOLS FOR FUTURE OPTICAL SATELLITE-DOWNLINKS
Authors:
AuthorsInstitution or Email of Authors
Giggenbach, Dirkdirk.giggenbach@dlr.de
Moll, Florianflorian.moll@dlr.de
Fuchs, Christianchristian.fuchs@dlr.de
de Cola, Tomasotomaso.decola@dlr.de
Mata-Calvo, Ramonramon.matacalvo@dlr.de
Date:4 October 2011
Refereed publication:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:optical LEO satellite downlinks, optical downlink channel, fading mitigation, error correction protocols, KNOCGOP
Event Title:62nd International Astronautical Congress
Event Location:Cape Town, South Africa
Event Type:international Conference
Event Dates:3.Okt - 7.Okt 2011
Organizer:IAF
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Traffic Management
DLR - Research area:Transport
DLR - Program:V VM - Verkehrsmanagement
DLR - Research theme (Project):V - VABENE (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Digital Networks
Deposited By: Dr.-Ing. Dirk Giggenbach
Deposited On:18 Oct 2011 08:22
Last Modified:24 Jan 2012 11:58

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