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Transportable optical ground station for high-speed free-pace laser communication

Shrestha, Amita and Brechtelsbauer, Martin (2012) Transportable optical ground station for high-speed free-pace laser communication. In: SPIE preceedings. SPIE. Laser Communication and Propagation through the Atmospher and Oceans (SPIE 2012), 12-16 August 2012, San Diego, USA. ISBN Proc. SPIE 8517.

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Official URL: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1387182

Abstract

Near real-time data downlinks from aircrafts, satellites and high altitude platforms via high-speed laser commu- nication links is an important research topic at the Institute of Communications and Navigation of the German Aerospace Center (DLR). Ground stations for such scenarios are usually fixed at a certain location. With a mo- tivation to provide a ground station that is quickly and easily deployed anywhere in the world, a transportable optical ground station (TOGS) has been developed. TOGS features a pneumatically deployable Cassegrain-type telescope with main mirror diameter of 60 cm, including optical tracking and receiving system. For calibration of position and attitude, multiple sensors like dual-antenna GPS and inclination sensors have been installed. In order to realize these systems, robust software that operates and controls them is essential. The software is platform independent and is aimed to be used on both mobile and ground terminals. It includes implementa- tion of accurate pointing, acquisition and tracking algorithms, hardware drivers, and user interfaces. Important modules of the software are GPS tracking, optical tracking, star- and satellite tracking, and calibration of the TOGS itself. Recently, a first successful data-downlink from an aircraft to TOGS using GPS tracking has been performed. To streamline the software development and testing process, some simulation environments like mount simulator, aircraft path simulator, tracking camera simulator and tracking error analysis tool have also been developed. This paper presents the overall hardware/software structure of the TOGS, and gives results of the tracking accuracy improvement techniques like GPS extrapolation and optical tracking.

Document Type:Conference or Workshop Item (Paper)
Title:Transportable optical ground station for high-speed free-pace laser communication
Authors:
AuthorsInstitution or Email of Authors
Shrestha, Amitaamita.shrestha@dlr.de
Brechtelsbauer, MartinMartin.Brechtelsbauer@dlr.de
Date:August 2012
Journal or Publication Title:SPIE preceedings
Refereed publication:Yes
In ISI Web of Science:No
Publisher:SPIE
ISBN:Proc. SPIE 8517
Status:Published
Keywords:TOGS, Simulator, optical communication, aircraft downlink, pointing, acquisition and tracking,tracking error, GPS extrapolation, free-space optical communication.
Event Title:Laser Communication and Propagation through the Atmospher and Oceans (SPIE 2012)
Event Location:San Diego, USA
Event Type:international Conference
Event Dates:12-16 August 2012
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Transport
HGF - Program Themes:Traffic Management
DLR - Research area:Transport
DLR - Program:V VM - Verkehrsmanagement
DLR - Research theme (Project):V - Projekt VABENE
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Satellitennetze
Deposited By: Amita Shrestha
Deposited On:14 Nov 2012 09:48
Last Modified:12 Dec 2013 21:50

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