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Paper Abstract and Keywords
Presentation 2011-02-25 14:55
Studies on operation algorithms for triaxial optical ground station
Yoshihisa Takayama, Yoshisada Koyama, Yozo Shoji, Morio Toyoshima (NICT) SAT2010-91
Abstract (in Japanese) (See Japanese page) 
(in English) An approach to control the pointing direction of a telescope in which one more rotation axis is added to the conventional set of the azimuth axis and the elevation axis is studied. The aim is to eliminate the angular range around the zenith of the telescope where the telescope cannot track moving objects due to the requirement of too fast rotation on the azimuth axis. In the triaxial telescope systems, the multiple sets of solutions are mathematically found as the rotation angles around the three axes, because the pointing direction of the telescope is in principle determined with just two angles. Thus to determine the unique set of solutions, an algorithm is introduced. Assuming the case of a LEO satellite tracking, the rotation angles and the angular velocities of the three axes are calculated and show that the triaxial telescope can track the LEO satellite without the requirement of too fast rotation angular velocity even when the satellite passes through almost the zenith.
Keyword (in Japanese) (See Japanese page) 
(in English) Space laser communications / optical ground station / OGS / triaxial telescope / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 426, SAT2010-91, pp. 91-95, Feb. 2011.
Paper # SAT2010-91 
Date of Issue 2011-02-17 (SAT) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee SANE SAT  
Conference Date 2011-02-24 - 2011-02-25 
Place (in Japanese) (See Japanese page) 
Place (in English) NICT Kobe Research Laboratories 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Satellite Application Technologies, etc. 
Paper Information
Registration To SAT 
Conference Code 2011-02-SANE-SAT 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Studies on operation algorithms for triaxial optical ground station 
Sub Title (in English)  
Keyword(1) Space laser communications  
Keyword(2) optical ground station  
Keyword(3) OGS  
Keyword(4) triaxial telescope  
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Keyword(6)  
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1st Author's Name Yoshihisa Takayama  
1st Author's Affiliation National Institute of Information and Communications Technology (NICT)
2nd Author's Name Yoshisada Koyama  
2nd Author's Affiliation National Institute of Information and Communications Technology (NICT)
3rd Author's Name Yozo Shoji  
3rd Author's Affiliation National Institute of Information and Communications Technology (NICT)
4th Author's Name Morio Toyoshima  
4th Author's Affiliation National Institute of Information and Communications Technology (NICT)
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Speaker Author-1 
Date Time 2011-02-25 14:55:00 
Presentation Time 25 minutes 
Registration for SAT 
Paper # SAT2010-91 
Volume (vol) vol.110 
Number (no) no.426 
Page pp.91-95 
#Pages 5 
Date of Issue 2011-02-17 (SAT) 

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