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Using a GPS-Aided Inertial System for Coarse-Pointing of Free-Space Optical Communication Terminals

Epple, Bernhard (2006) Using a GPS-Aided Inertial System for Coarse-Pointing of Free-Space Optical Communication Terminals. In: Proceedings of SPIE -- Volume 6304, 630418-1-630418-10. SPIE Optical Press. Free-Space Laser Communications VI, 2006-08-15 - 2006-08-17, San Diego, California, USA. ISBN 0-8194-6383-3. ISSN 0277-786X

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Abstract

In the Capanina project, it has been shown that it is possible to use solely GPS positions for coarse-pointing of a stratospheric free-space optical communication terminal. Although this system design has been shown to be functional, it has to deal with acquisition and reacquisition times of up to 20 seconds. Whenever the line of sight is blocked, the Capanina terminal has to do a reacquisition of the partner terminal. In land-mobile systems, e.g. transmission between a moving vehicle and a fixed station, where objects like trees or buildings can frequently block the line of sight, this type of acquisition/reacquisition is not acceptable. In this paper a revised system design will be shown, which reduces the initial acquisition time to below a second by using information from a GPS-Aided Inertial System (GPS-INS). It will also be shown how reacquisition times and coarse-pointing errors can be reduced to a minimum by using feedback from the optical fine-pointing device. Finally a demonstrator setup and some test results will be presented.

Document Type:Conference or Workshop Item (Speech)
Title:Using a GPS-Aided Inertial System for Coarse-Pointing of Free-Space Optical Communication Terminals
Authors:
AuthorsInstitution or Email of Authors
Epple, BernhardUNSPECIFIED
Date:August 2006
Journal or Publication Title:Proceedings of SPIE -- Volume 6304
Refereed publication:Yes
In ISI Web of Science:No
Page Range:630418-1-630418-10
Editors:
EditorsEmail
SPIE-The International Society for Optical Engineering, UNSPECIFIED
Publisher:SPIE Optical Press
ISSN:0277-786X
ISBN:0-8194-6383-3
Status:Published
Keywords:GPS, INS, PAT, AHRS, pointing, acquisition and tracking, KNOCGOP
Event Title:Free-Space Laser Communications VI
Event Location:San Diego, California, USA
Event Type:international Conference
Event Dates:2006-08-15 - 2006-08-17
Organizer:SPIE
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: Florian Moll
Deposited On:06 Aug 2007
Last Modified:12 Dec 2013 20:26

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