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| Presentation | 2016-07-22 10:20 Long-term Statistics of Changes in Cross-Polarization Discrimination of Ka-band Satellite Communication Signals due to Thunderstorm Yasuyuki Maekawa (Osaka Eletcro-Com. Univ.)  AP2016-57 SAT2016-23 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Rapid changes in cross-polarization discrimination (XPD) of Ka-band satellite radio wave caused by thunder- storm events are presented using the beacon signal (19.45GHz, right-hand circular polarization) of CS-3 and N-Star observed at 1 sec interval in Osaka Electro-Communication University, Neyagawa, Osaka, from 1990 to 2006. Their yearly statistics and yearly variations are discussed using the co-polar and cross-polar signals received for the past 17 years of these observation periods. Some rapid changes are found to actually coincide with the cloud-to-ground lightning strokes which occurred on the south side of our earth station at the distance of about 10 km. At the moment of the rapid changes, Most of the observed data indicate decrease in XPD. Also, they show the tendencies that cross-polar phases approaches -90 deg after the rapid changes, indicating that canting angles of ice crystals possibly causing the depolarization changes quickly decrease toward the horizontal direction. The number of thunderstorm events and rapid changes in XPD shows large yearly variations in a time scale of about five years. These long-term yearly variations may be related to periodic cycles of summertime convective activities in Japan, probably caused by larger-scale climate change in the equatorial region. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Satellite communications / Ka-band / Cross-polarization discrimination / Cross-polar phase / Lightning discharge / Rapid changes / Long-term variation / | |
| Reference Info. | IEICE Tech. Rep., vol. 116, no. 142, AP2016-57, pp. 115-118, July 2016. | |
| Paper # | AP2016-57 | |
| Date of Issue | 2016-07-13 (AP), 2016-07-14 (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) | |
| Download PDF | AP2016-57 SAT2016-23 |
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| Conference Information | |
| Committee | AP SAT SANE |
| Conference Date | 2016-07-20 - 2016-07-22 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Otaru port marina |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Remote sensing, Radio propagation, Antennas and Propagation, Sattelite Communication |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2016-07-AP-SAT-SANE |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Long-term Statistics of Changes in Cross-Polarization Discrimination of Ka-band Satellite Communication Signals due to Thunderstorm |
| Sub Title (in English) | |
| Keyword(1) | Satellite communications |
| Keyword(2) | Ka-band |
| Keyword(3) | Cross-polarization discrimination |
| Keyword(4) | Cross-polar phase |
| Keyword(5) | Lightning discharge |
| Keyword(6) | Rapid changes |
| Keyword(7) | Long-term variation |
| Keyword(8) | |
| 1st Author's Name | Yasuyuki Maekawa |
| 1st Author's Affiliation | Osaka Electro-Communication University (Osaka Eletcro-Com. Univ.) |
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| Speaker | Author-1 |
| Date Time | 2016-07-22 10:20:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2016-57, SAT2016-23 |
| Volume (vol) | vol.116 |
| Number (no) | no.142(AP), no.144(SAT) |
| Page | pp.115-118(AP), pp.69-72(SAT) |
| #Pages | 4 |
| Date of Issue | 2016-07-13 (AP), 2016-07-14 (SAT) |
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