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| Presentation | 2017-07-27 10:35 Estimation of Cross-Polarization Discrimination Degradation of Ka-band Satellite Communication Signals due to Lightning Discharges Yasuyuki Maekawa (Osaka Electro-Comm. Univ.)  AP2017-53 SAT2017-9 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | Increase and decrease of rapid changes in cross-polarization discrimination (XPD) of Ka-band satellite radio wave caused by thunderstorm events are investigated using the beacon signal (19.45GHz, right-hand circular polarization) of CS-3 and N-Star observed at 1 or 0.1 sec intervals in Osaka Electro-Communication University, Neyagawa, Osaka, from 1990 to 2006. A considerable amount of rapid changes in XPD shows increase of XPD values, meaning decrease of depolarization, although the previous C-band low elevation angle observations conducted by the international satellite communications links primarily showed decrease of XPD values. This tendency is consistently explained examining the increase and decrease of the observed XPD and cross-polar phases, under the assumption of appropriate XPD and cross-polar phases due to the alignment and mean canting angles of ice crystals at the discharging point. Also, the XPD values and cross-polar phases are directly traced during the rapid changes at the discharging point using those measured at 0.1 sec interval. It is found that the XPD values due to the alignment of ice crystals disappear in about 0.5 sec, while the mean canting angles of ice crystals move from nearly vertical around 90°to horizontal around 0°in this short period. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | Satellite communications / Ka-band / Cross-polarization discrimination / Cross-polar phase / Lightning discharge / Rapid changes / Ice crystals / Canting angles | |
| Reference Info. | IEICE Tech. Rep., vol. 117, no. 150, AP2017-53, pp. 47-50, July 2017. | |
| Paper # | AP2017-53 | |
| Date of Issue | 2017-07-19 (AP), 2017-07-20 (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 | AP2017-53 SAT2017-9 |
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| Conference Information | |
| Committee | AP SAT SANE |
| Conference Date | 2017-07-26 - 2017-07-28 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Nagoya Institute of Technology |
| 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 | 2017-07-AP-SAT-SANE |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Estimation of Cross-Polarization Discrimination Degradation of Ka-band Satellite Communication Signals due to Lightning Discharges |
| 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) | Ice crystals |
| Keyword(8) | Canting angles |
| 1st Author's Name | Yasuyuki Maekawa |
| 1st Author's Affiliation | Osaka Electro-Communication University (Osaka Electro-Comm. Univ.) |
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| Speaker | Author-1 |
| Date Time | 2017-07-27 10:35:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2017-53, SAT2017-9 |
| Volume (vol) | vol.117 |
| Number (no) | no.150(AP), no.152(SAT) |
| Page | pp.47-50(AP), pp.19-22(SAT) |
| #Pages | 4 |
| Date of Issue | 2017-07-19 (AP), 2017-07-20 (SAT) |
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