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Paper Abstract and Keywords
Presentation 2016-05-19 14:50
Long-term Yearly Variation of Rain Attenuation Statistics in Ku-Band Satellite Communications Links
Yasuyuki Maekawa, Hidemi Miura (Osaka Electro-Commun. Univ.) AP2016-20
Abstract (in Japanese) (See Japanese page) 
(in English) The long-term rain attenuation statistics of cumulative time percentages are obtained from Ku band satellite signal observations conducted at Osaka Electro-Communication University in Neyagawa, Osaka, from 1988 to 2016. The long-term statistics for about 20 years up to 2006 are in very good agreement with the recent ITU-R predictions obtained from the 0.01% rainfall rate, and their 0.01% values indicate fairly large yearly variations which amount to about 20% of each value. Besides the yearly rainfall rate statistics, these variations seem to be caused by those of the equivalent rain path length at each year, which becomes longer as the average ground temperature at rain time from May to October becomes higher. However, the increase of the equivalent rain path length is not simply explained in term of the rise of rain height proportional to the ground temperature, but rather related to the occurrence of rain attenuation due to tropical-type rainfall such as shower and typhoon in summer time. Also, the equivalent path length tends to increase further for the last 10 years since 2006, and this tendency seems to be related to the overall increase of the average ground temperature at rain time in each year.
Keyword (in Japanese) (See Japanese page) 
(in English) Satellite communications / Rain attenuation / Rainfall rate / Ku-band / Long-term statistics / Equivalent path length / /  
Reference Info. IEICE Tech. Rep., vol. 116, no. 43, AP2016-20, pp. 23-26, May 2016.
Paper # AP2016-20 
Date of Issue 2016-05-12 (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 AP2016-20

Conference Information
Committee AP  
Conference Date 2016-05-19 - 2016-05-20 
Place (in Japanese) (See Japanese page) 
Place (in English) kobe Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Antennas and Propagation 
Paper Information
Registration To AP 
Conference Code 2016-05-AP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Long-term Yearly Variation of Rain Attenuation Statistics in Ku-Band Satellite Communications Links 
Sub Title (in English)  
Keyword(1) Satellite communications  
Keyword(2) Rain attenuation  
Keyword(3) Rainfall rate  
Keyword(4) Ku-band  
Keyword(5) Long-term statistics  
Keyword(6) Equivalent path length  
Keyword(7)  
Keyword(8)  
1st Author's Name Yasuyuki Maekawa  
1st Author's Affiliation Osaka Electro-Communication University (Osaka Electro-Commun. Univ.)
2nd Author's Name Hidemi Miura  
2nd Author's Affiliation Osaka Electro-Communication University (Osaka Electro-Commun. Univ.)
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Speaker Author-1 
Date Time 2016-05-19 14:50:00 
Presentation Time 25 minutes 
Registration for AP 
Paper # AP2016-20 
Volume (vol) vol.116 
Number (no) no.43 
Page pp.23-26 
#Pages 4 
Date of Issue 2016-05-12 (AP) 

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