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Paper Abstract and Keywords
Presentation 2017-04-20 15:15
Relationship between Tropospheric Scintillation and Atmospheric Turbulence in High Elevation Angle Satellite Communications Links
Yasuyuki Maekawa (Osaka Electro-Comun. Univ.) AP2017-9
Abstract (in Japanese) (See Japanese page) 
(in English) Variations of Ku-band satellite signal level with periods from a few to a few ten minutes caused by tropospheric scintillation in clear sky conditions are investigated using BS (Broadcasting Satellite) signal (11.84GHz, EL=41.4°right-hand circular polarization) observed at 1 sec interval in Osaka Electro-Communication University, Neyagawa, Osaka, for the past seven years from 2010 to 2016. The results are compared with cumulative time percentages of attenuation due to tropospheric scintillation predicted by the recent ITU-R recommendations. In summertime, the cumulative time percentages of BS signal level variations primarily caused by atmospheric convection agree well with the ITU-R predictions based on propagation-path elevation angle, frequency, antenna diameter, and monthly average ground temperature. In winter and early spring from January to March, however, variations considerably larger than the ITU-R predictions are often detected depending on observation years, although the cumulative time percentages are small. These variations are possibly related to stratiform turbulence due to enhancement of jet stream and wintertime monsoon other than convection. These features should be further investigated by direct measurement of turbulent structures using MU radar and Boundary Layer radars in near locations.
Keyword (in Japanese) (See Japanese page) 
(in English) Satellite communications / High elevation angle / Ku-band / Troposphere / Scintillation / Turbulence / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 2, AP2017-9, pp. 47-50, April 2017.
Paper # AP2017-9 
Date of Issue 2017-04-13 (AP) 
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)
Download PDF AP2017-9

Conference Information
Committee AP  
Conference Date 2017-04-20 - 2017-04-21 
Place (in Japanese) (See Japanese page) 
Place (in English) Osaka university 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2017-04-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Relationship between Tropospheric Scintillation and Atmospheric Turbulence in High Elevation Angle Satellite Communications Links 
Sub Title (in English)  
Keyword(1) Satellite communications  
Keyword(2) High elevation angle  
Keyword(3) Ku-band  
Keyword(4) Troposphere  
Keyword(5) Scintillation  
Keyword(6) Turbulence  
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Keyword(8)  
1st Author's Name Yasuyuki Maekawa  
1st Author's Affiliation Osaka Electro-Communication University (Osaka Electro-Comun. Univ.)
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Speaker Author-1 
Date Time 2017-04-20 15:15:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2017-9 
Volume (vol) vol.117 
Number (no) no.2 
Page pp.47-50 
#Pages 4 
Date of Issue 2017-04-13 (AP) 

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