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Scintillation Loss in Optical Low Earth Orbit Data Downlinks with Avalanche Photodiode Receivers

Giggenbach, Dirk and Moll, Florian (2017) Scintillation Loss in Optical Low Earth Orbit Data Downlinks with Avalanche Photodiode Receivers. In: ICSOS 2017. IEEE Xplore. International Conference on Space Optical Systems 2017 (ICSOS), 13.-16. Nov. 2017, Naha, Japan.

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Official URL: http://ieeexplore.ieee.org/


Future Earth Observation satellite data downlinks via directed laser beams are a promising technique to overcome the data repatriation bottleneck in high resolution sensor missions. A challenge for this technology are received power scintillations induced by atmospheric index-of-refraction turbulence (IRT). The strength of these signal variations depends on the IRT height profile, receiver aperture size, wavelength, and link elevation. We analyze measured optical satellite downlink power vectors to verify a model for the dynamic power scintillation loss. Due to their increased sensitivity compared with PIN-receivers, Avalanche Photo Diodes (APD) are usually used within data receivers on ground. This allows bulk receivers to avoid the demanding coupling onto single-mode detectors. As their sensitivity run is defined by the influence of thermal-, and signal-dependent shot-noise, a new formulation for this dependency is evaluated, and the according modified scintillation loss is quantified. This allows appropriate dimensioning of link budgets and the necessary error control mechanisms to enable reliable high-speed data transfer from low earth orbit satellites to the ground.

Item URL in elib:https://elib.dlr.de/115715/
Document Type:Conference or Workshop Item (Speech)
Title:Scintillation Loss in Optical Low Earth Orbit Data Downlinks with Avalanche Photodiode Receivers
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Giggenbach, DirkDirk.Giggenbach (at) dlr.deUNSPECIFIED
Moll, FlorianFlorian.Moll (at) dlr.deUNSPECIFIED
Date:November 2017
Journal or Publication Title:ICSOS 2017
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Publisher:IEEE Xplore
Keywords:FSO, optical LEO downlinks, scintillation loss, shot-noise limited receiver, Avalanche Photo Diode, KNOCGOP
Event Title:International Conference on Space Optical Systems 2017 (ICSOS)
Event Location:Naha, Japan
Event Type:international Conference
Event Dates:13.-16. Nov. 2017
Organizer:National Institute of Communications Technology, Japan (NICT)
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 - Vorhaben Multimedia Satellitennetze (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Satellite Networks
Deposited By: Giggenbach, Dr.-Ing. Dirk
Deposited On:28 Nov 2017 13:55
Last Modified:31 Jul 2019 20:13

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