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LEO-ground scintillation measurements with the optical ground station Oberpfaffenhofen and SOTA/OPALS space terminals

Moll, Florian and Kolev, Dimitar and Abrahamson, Matthew and Schmidt, Christopher and Mata Calvo, Ramon and Fuchs, Christian (2016) LEO-ground scintillation measurements with the optical ground station Oberpfaffenhofen and SOTA/OPALS space terminals. In: Proceedings of SPIE - The International Society for Optical Engineering, pp. 999102-1. SPIE Press. SPIE Advanced Free-Space Optical Communication Techniques and Applications II, 26. Sep. 2016, Edinburgh. DOI: 10.1117/12.2254809

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Official URL: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=2575630&resultClick=1

Abstract

The optical satellite-ground channel is turbulent and causes scintillation of the power received by a ground based telescope. Measurements are important to quantify the effect and evaluate common theory. A telescope with 40 cm primary mirror is used to measure the signals from the OPALS terminal on the International Space Station and the SOTA terminal on the SOCRATES satellite. The measurement instrument is a pupil camera from which images are recorded and intensity scintillation index, power scintillation index, probability density function of intensity and intensity correlation width are derived. A preliminary analysis of measurements from three satellite passed is performed, presented and discussed. The intensity scintillation index ranges from ~0.25 to ~0.03 within elevations of 26 to 66 deg. Power scintillation index varies from ~0.08 to ~0.006 and correlation width of intensity between ~11 and ~3 cm. The measurements can be used to estimate the fluctuation dynamics to be expected for a future operational ground receiver. The measurements are compared to model calculations based on the HV5/7-profile. Good agreement is observed to some part in the intensity scintillation index. Agreement is less for the power scintillation index and intensity correlation width. The reason seems to be a reduction of aperture averaging in some sections of the measurements due to increased speckle size. Finally, topics for future work are identified to improve the measurement analysis and deeper investigate the origin of the observed behavior. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.

Item URL in elib:https://elib.dlr.de/110518/
Document Type:Conference or Workshop Item (Speech)
Title:LEO-ground scintillation measurements with the optical ground station Oberpfaffenhofen and SOTA/OPALS space terminals
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Moll, Florianflorian.moll (at) dlr.deUNSPECIFIED
Kolev, DimitarNICTUNSPECIFIED
Abrahamson, MatthewNASAUNSPECIFIED
Schmidt, Christopherchristopher.schmidt (at) dlr.deUNSPECIFIED
Mata Calvo, Ramonramon.matacalvo (at) dlr.deUNSPECIFIED
Fuchs, Christianchristian.fuchs (at) dlr.deUNSPECIFIED
Date:21 October 2016
Journal or Publication Title:Proceedings of SPIE - The International Society for Optical Engineering
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
DOI :10.1117/12.2254809
Page Range:pp. 999102-1
Publisher:SPIE Press
Status:Published
Keywords:Satellite communications, free-space optical communications, scintillation, low earth orbit, Optical Ground Station Oberpfaffenhofen, SOTA, OPALS
Event Title:SPIE Advanced Free-Space Optical Communication Techniques and Applications II
Event Location:Edinburgh
Event Type:international Conference
Event Dates:26. Sep. 2016
Organizer:SPIE
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
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Satellite Networks
Deposited By: Moll, Florian
Deposited On:11 Jan 2017 13:33
Last Modified:31 Jul 2019 20:07

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