| Presentation | 2022-10-06 Recent increase in rain attenuation statistics of Ku-band satellite communications links and its relation to the climate change Shoya Funo, Yoshiaki Shibagaki, Yasuyuki Maekawa, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Rain attenuation statistics of the Ku-band BS radio wave (11.84 GHz) measured over 30 years at Osaka Electro-Communication University (OECU, Neyagawa City, Osaka Prefecture) show a remarkable increase in the occurrence time percentages since 2006. In particular, we will focus on the increasing tendency of the attenuation value corresponding to the time rate of 0.01%, and describe the results of a detailed comparison with the ITU-R recommended value. In addition, it is pointed out that the annual average rain area equivalent path length calculated from the specific attenuation α [dB/km] has significantly increased since 2006 compared to the ITU-R recommendations. Also, it is found that the equivalent path length is related to the increase in sea surface temperature in the waters near Japan, as well as that of the Pacific Ocean or the Indian Ocean. Especially after 2006, the correlation with the sea surface temperature of the Indian Ocean is shown to become higher. Therefore, it is confirmed that the rainfall attenuation statistics are strongly affected by global climate change such as the Indian Ocean, similarly to the recent weather conditions in Japan. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Satellite communications / Rain attenuation / Rainfall rate / Ku-band / Climate change / Sea surface temperature |
| Paper # | SAT2022-47 |
| Date of Issue | 2022-09-29 (SAT) |
| Conference Information | |
| Committee | SAT / KOSST |
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| Conference Date | 2022/10/6(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | |
| Chair | Tetsushi Ikegami(Meiji Univ.) |
| Vice Chair | Masashi Kamei(NHK) / Takana Kaho(Shonan Inst. of Tech.) |
| Secretary | Masashi Kamei(NTT) / Takana Kaho(NICT) |
| Assistant | Riichiro Nagareda(KDDI Research) / Yuuki Koizumi(NHK) |
| Paper Information | |
| Registration To | Technical Committee on Satellite Telecommunications / Korea Society of Satellite Technology |
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| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Recent increase in rain attenuation statistics of Ku-band satellite communications links and its relation to the climate change |
| Sub Title (in English) | |
| Keyword(1) | Satellite communications |
| Keyword(2) | Rain attenuation |
| Keyword(3) | Rainfall rate |
| Keyword(4) | Ku-band |
| Keyword(5) | Climate change |
| Keyword(6) | Sea surface temperature |
| 1st Author's Name | Shoya Funo |
| 1st Author's Affiliation | Osaka Electro-Communication University(Osaka Electro-Commun. Univ.) |
| 2nd Author's Name | Yoshiaki Shibagaki |
| 2nd Author's Affiliation | Osaka Electro-Communication University(Osaka Electro-Commun. Univ.) |
| 3rd Author's Name | Yasuyuki Maekawa |
| 3rd Author's Affiliation | Osaka Electro-Communication University(Osaka Electro-Commun. Univ.) |
| Date | 2022-10-06 |
| Paper # | SAT2022-47 |
| Volume (vol) | vol.122 |
| Number (no) | SAT-199 |
| Page | pp.pp.16-19(SAT), |
| #Pages | 4 |
| Date of Issue | 2022-09-29 (SAT) |