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Optical Communication from HAPs - Overview of the Stratospheric Optical Payload Experiment (STROPEX)

Horwath, Joachim and Grace, David and Giggenbach, Dirk and Knapek, Markus and Perlot, Nicolas (2004) Optical Communication from HAPs - Overview of the Stratospheric Optical Payload Experiment (STROPEX). In: Proceedings ICSSC 2004. 22nd AIAA International Communications Satellite Systems Conference & Exhibit 2004 (ICSSC), Monterey, CA, May 9-12, 2004, Monterey, CA.

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Abstract

This paper describes the STRatospheric OPtical Downlink EXperiment (STROPEX) which is part of a large European Union funded research project called “CAPANINA” (Communications from Aerial Platform Networks delivering Broadband Communications for All). The aim of STROPEX is to demonstrate a high-bitrate optical downlink from a stratospheric balloon or High Altitude Platform and perform measurements on the optical channel. At first, an overview of the CAPANINA project is given. Then the system approaches for the optical trials are presented. Atmospheric attenuation effects on optical waves are described and calculation results of total attenuation for the downlink and used wavelengths are presented. Index-of-refraction effects and their impact on the intensity distribution at the receiver are introduced. The spatial covariance function, the probability density functions (PDF), derived from numerical simulations are discussed for two different turbulence conditions. In the last part, instruments to measure atmospheric parameters are described. These instruments are used to characterize the optical atmospheric channel during the campaigns. The first instrument measures the deterioration of the beam wavefront caused by atmospheric turbulence. The second instrument is a real-time turbulence profiler. The atmospheric turbulent layers are derived from measurements of the spatial distribution of the intensity at the receiver. A brief introduction to the working principles of these two instruments and the favored approach for STROPEX is given.

Document Type:Conference or Workshop Item (Paper)
Additional Information: LIDO-Berichtsjahr=2004, monograph_id=AIAA-2004-3218,
Title:Optical Communication from HAPs - Overview of the Stratospheric Optical Payload Experiment (STROPEX)
Authors:
AuthorsInstitution or Email of Authors
Horwath, JoachimUNSPECIFIED
Grace, DavidUniversity of York, Heslington, Great Britain
Giggenbach, DirkUNSPECIFIED
Knapek, MarkusUNSPECIFIED
Perlot, NicolasUNSPECIFIED
Date:2004
Journal or Publication Title:Proceedings ICSSC 2004
Refereed publication:Yes
In ISI Web of Science:No
Status:Published
Keywords:Optical Communication, HAP, STROPEX, KNOCGOP
Event Title:22nd AIAA International Communications Satellite Systems Conference & Exhibit 2004 (ICSSC), Monterey, CA, May 9-12, 2004
Event Location:Monterey, CA
Event Type:international Conference
Organizer:American Institute of Aeronautics and Astronautics (AIAA)
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W KN - Kommunikation/Navigation
DLR - Research area:Space
DLR - Program:W KN - Kommunikation/Navigation
DLR - Research theme (Project):W - Vorhaben Multimedia Satellitennetze (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Digital Networks
Deposited By: Dr.-Ing. Dirk Giggenbach
Deposited On:10 Aug 2006
Last Modified:06 Jan 2010 21:31

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