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| Presentation | 2022-10-20 13:35 A Study on the Relationship between Atmospheric Inversion Layer and Duct Propagation from Korea in VHF Band Rikito Tateishi, Makoto Kobayashi, Koichi Shin, Masahiro Nishi (Hiroshima City Univ.)  AP2022-140 |
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| Abstract | (in Japanese) | (See Japanese page) |
| (in English) | It is important to understand the radio environment of the VHF band in detail, because the FM broadcast waves in VHF band are important media during disasters and are also used for temporary disaster broadcast stations. From 88 to 108 MHz are also used as FM broadcasting in Korea, and there is concern about overreaching interference to Japanese broadcasting waves due to duct propagation. Atmospheric ducts, which are a factor in duct propagation, are caused by an inversion layer of atmospheric refractive index. The inversion layer has been modeled by $M$-curves. The aerology required to derive the $M$-curve is not usually available over the duct propagation path due to the limited number of observation station. In this study, the relationship between the $M$-curve obtained in propagation and the increase in received level due to duct propagation was evaluated with the aim of estimating duct propagation from the $M$-curve obtained in aerology not over the propagation path. As a result of the evaluation, the larger the negative slope of the $M$-curve, the higher the received level, even if aerology was not observed just over the propagation path. | |
| Keyword | (in Japanese) | (See Japanese page) |
| (in English) | VHF / FM / duct propagation / atmospheric inversion layer / aerology / / / | |
| Reference Info. | IEICE Tech. Rep., vol. 122, no. 214, AP2022-140, pp. 205-210, Oct. 2022. | |
| Paper # | AP2022-140 | |
| Date of Issue | 2022-10-12 (AP) | |
| ISSN | 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 | AP2022-140 |
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| Conference Information | |
| Committee | AP |
| Conference Date | 2022-10-19 - 2022-10-20 |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | GIFU CITY CULTURE CENTER |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Student Session, Antennas and Propagation |
| Paper Information | |
| Registration To | AP |
| Conference Code | 2022-10-AP |
| Language | Japanese |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on the Relationship between Atmospheric Inversion Layer and Duct Propagation from Korea in VHF Band |
| Sub Title (in English) | |
| Keyword(1) | VHF |
| Keyword(2) | FM |
| Keyword(3) | duct propagation |
| Keyword(4) | atmospheric inversion layer |
| Keyword(5) | aerology |
| Keyword(6) | |
| Keyword(7) | |
| Keyword(8) | |
| 1st Author's Name | Rikito Tateishi |
| 1st Author's Affiliation | Hiroshima City University (Hiroshima City Univ.) |
| 2nd Author's Name | Makoto Kobayashi |
| 2nd Author's Affiliation | Hiroshima City University (Hiroshima City Univ.) |
| 3rd Author's Name | Koichi Shin |
| 3rd Author's Affiliation | Hiroshima City University (Hiroshima City Univ.) |
| 4th Author's Name | Masahiro Nishi |
| 4th Author's Affiliation | Hiroshima City University (Hiroshima City Univ.) |
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| Speaker | Author-1 |
| Date Time | 2022-10-20 13:35:00 |
| Presentation Time | 25 minutes |
| Registration for | AP |
| Paper # | AP2022-140 |
| Volume (vol) | vol.122 |
| Number (no) | no.214 |
| Page | pp.205-210 |
| #Pages | 6 |
| Date of Issue | 2022-10-12 (AP) |
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