Knopp, Marcus Thomas und Spörl, Andreas und Gnat, Marcin und Rossmanith, Gregor Johannes und Huber, Felix und Fuchs, Christian und Giggenbach, Dirk (2018) TOWARDS THE UTILIZATION OF OPTICAL GROUND-TO-SPACE LINKS FOR LOW EARTH ORBITING SPACECRAFT. In: Proceedings of the International Astronautical Congress, IAC. International Astronautical Congress (IAC), 2018-10-01 - 2018-10-05, Bremen.
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Kurzfassung
The microwave spectrum has become a highly limited resource in satellite communications owing to an ever increasing demand for bandwidth and capacity. Therefore, a shift to the exploitation of optical carrier frequencies is currently underway. Focusing on high-rate transmissions of payload data from remote sensing satellites, operational systems, like the well-known European Data Relay Satellite system, are based on optical inter-satellite links. Besides, direct-to-earth free-space optical communications from low Earth orbiting spacecraft hold high potential for upcoming space missions through lower complexity. In that regard, we study the viability of the ground-to-space beacon laser signal of optical ground stations to be additionally modulated with tele-command tokens. Such an optical return channel could be variously put into use, e.g. to trigger automatic repeat requests of payload data downlinks, for jamming-free control of the spacecraft or for high-rate software uploads to its on-board processor. A particular challenge is posed by the unequal fading behavior of the optical channel regarding the down- and uplinks, which cover asymmetric optical pathways through the atmosphere. We define the end-to-end architecture of the communication chain including the transmitter on ground and the space-based receiver. Special attention is given to compatibility with established space data and system standards. Moreover, we examine the effects on the scheduling of satellite control, resulting from a constrained availability of the optical uplink due to cloud blockages. Our analysis aims at the employment of available space protocols for bidirectional optical communications with low earth orbiting spacecraft. Further on, we consider the adoption of upcoming standards to account for the optical fading channel. Certain applications like immediate automatic-repeat-requests for the downlink will require novel, optimized protocols.
elib-URL des Eintrags: | https://elib.dlr.de/123196/ | ||||||||||||||||||||||||||||||||
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Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||||||||||||||||||
Titel: | TOWARDS THE UTILIZATION OF OPTICAL GROUND-TO-SPACE LINKS FOR LOW EARTH ORBITING SPACECRAFT | ||||||||||||||||||||||||||||||||
Autoren: |
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Datum: | Oktober 2018 | ||||||||||||||||||||||||||||||||
Erschienen in: | Proceedings of the International Astronautical Congress, IAC | ||||||||||||||||||||||||||||||||
Referierte Publikation: | Nein | ||||||||||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||||||||||
In ISI Web of Science: | Nein | ||||||||||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||||||||||
Stichwörter: | KNOCGOP, Free-space optical communication, satellite communications, optical ground-to-space links, direct-to-earth links | ||||||||||||||||||||||||||||||||
Veranstaltungstitel: | International Astronautical Congress (IAC) | ||||||||||||||||||||||||||||||||
Veranstaltungsort: | Bremen | ||||||||||||||||||||||||||||||||
Veranstaltungsart: | internationale Konferenz | ||||||||||||||||||||||||||||||||
Veranstaltungsbeginn: | 1 Oktober 2018 | ||||||||||||||||||||||||||||||||
Veranstaltungsende: | 5 Oktober 2018 | ||||||||||||||||||||||||||||||||
Veranstalter : | IAF | ||||||||||||||||||||||||||||||||
HGF - Forschungsbereich: | Luftfahrt, Raumfahrt und Verkehr | ||||||||||||||||||||||||||||||||
HGF - Programm: | Raumfahrt | ||||||||||||||||||||||||||||||||
HGF - Programmthema: | Kommunikation und Navigation | ||||||||||||||||||||||||||||||||
DLR - Schwerpunkt: | Raumfahrt | ||||||||||||||||||||||||||||||||
DLR - Forschungsgebiet: | R KN - Kommunikation und Navigation | ||||||||||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | R - Projekt PROSIRIS (alt) | ||||||||||||||||||||||||||||||||
Standort: | Oberpfaffenhofen | ||||||||||||||||||||||||||||||||
Institute & Einrichtungen: | Raumflugbetrieb und Astronautentraining > Controlling und Akquisition Institut für Kommunikation und Navigation > Satellitennetze | ||||||||||||||||||||||||||||||||
Hinterlegt von: | Giggenbach, Dr.-Ing. Dirk | ||||||||||||||||||||||||||||||||
Hinterlegt am: | 20 Nov 2018 10:50 | ||||||||||||||||||||||||||||||||
Letzte Änderung: | 24 Apr 2024 20:27 |
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