Shrestha, Amita and Giggenbach, Dirk and Hanik, Norbert (2018) Variable Data Rate for Free Space optical Low Earth orbit Downlinks (OLEODL). In: International Conference on Transparent Optical Networks. ICTON 2018, 02-05 July 2018, Bucharest, Romania.
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Abstract
Low-Earth-orbit (LEO) satellites for Earth observation have typical orbit altitudes of 400 to 600km. Since their on-board sensors resolution is advancing, the need for very high rate satellite downlinks is increasing into the range of several gigabits per second. Free-space optical communications is ideal for such applications, as it offers very high data rate, while allowing smaller satellite terminals and avoiding spectral regulation constraints. However, the key challenges in optical LEO downlinks (OLEODL) are the varying free space loss due to distance changes during a downlink contact, atmospheric attenuation, and the fast signal scintillation due to atmospheric index-of-refraction turbulence (IRT). This paper will briefly explain OLEODL technology, its challenges, and suitable mitigation techniques. The paper will focus on why varying the data rate according to channel state is important for OLEODL and how it can be achieved
Item URL in elib: | https://elib.dlr.de/120824/ | ||||||||||||
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Document Type: | Conference or Workshop Item (Speech) | ||||||||||||
Title: | Variable Data Rate for Free Space optical Low Earth orbit Downlinks (OLEODL) | ||||||||||||
Authors: |
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Date: | 3 July 2018 | ||||||||||||
Journal or Publication Title: | International Conference on Transparent Optical Networks | ||||||||||||
Refereed publication: | Yes | ||||||||||||
Open Access: | Yes | ||||||||||||
Gold Open Access: | No | ||||||||||||
In SCOPUS: | Yes | ||||||||||||
In ISI Web of Science: | No | ||||||||||||
Status: | Published | ||||||||||||
Keywords: | KNOGSOP, Variable data rate, FSO, OLEODL, LEO downlinks, VarDR | ||||||||||||
Event Title: | ICTON 2018 | ||||||||||||
Event Location: | Bucharest, Romania | ||||||||||||
Event Type: | international Conference | ||||||||||||
Event Dates: | 02-05 July 2018 | ||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||
HGF - Program: | Space | ||||||||||||
HGF - Program Themes: | Communication and Navigation | ||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||
DLR - Program: | R KN - Kommunikation und Navigation | ||||||||||||
DLR - Research theme (Project): | R - Projekt PROSIRIS | ||||||||||||
Location: | Oberpfaffenhofen | ||||||||||||
Institutes and Institutions: | Institute of Communication and Navigation > Satellite Networks | ||||||||||||
Deposited By: | Shrestha, Amita | ||||||||||||
Deposited On: | 17 Jul 2018 10:22 | ||||||||||||
Last Modified: | 31 Jul 2019 20:18 |
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