| Presentation | 2017-10-26 Yearly Variation of Rain Attenuation Characteristics of Ku-Band Satellite Communications Links in the Tropical Region Yasuyuki Maekawa, Yu Nishimura, Yoshiaki Shibagaki, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Four-year rain attenuation statistics from January 2003 to September 2006 are obtained for both up and down links of Ku-band Superbird C, which connects the earth stations in Equatorial Atmosphere Radar (EAR) in West Sumatra, Indonesia and Research Institute of Sustainable Humanosphere (RISH) of Kyoto University in Uji, Kyoto. Yearly variation of the attenuation ratio of up link to down link is discussed in light of dominant rain cloud types in each year. The attenuation ratio at the earth station in EAR, on an average, shows fairy large variation from around 1.1 to 1.5 according to each rainfall event. Comparatively large values of the attenuation ratio are obtained for the events with a single peak of attenuation, while smaller values tend to be obtained as the peak of attenuation becomes two and three or more. This seems to be related to a tendency that the clouds passing through the propagation path may include larger raindrop size distribution as their scales become larger. The relationship between these rain cloud types and characteristics of equatorial climate should be further investigated, such as their yearly variation or difference between wet and dry seasons in the tropical region. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Satellite communications / Radio wave propagation / Ku band / Rain attenuation / Up and down link / Tropical region |
| Paper # | SAT2017-45 |
| Date of Issue | 2017-10-19 (SAT) |
| Conference Information | |
| Committee | SAT |
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| Conference Date | 2017/10/26(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | Okinawa Cellular Telephone Company |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Satellite communications, etc. |
| Chair | Toshinori Susuki(Tohoku Gakuin Univ.) |
| Vice Chair | Hiroyuki Tsuji(NICT) / Fumihiro Yamashita(NTT) |
| Secretary | Hiroyuki Tsuji(KDDI Reesarch) / Fumihiro Yamashita(NICT) |
| Assistant | |
| Paper Information | |
| Registration To | Technical Committee on Satellite Telecommunications |
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| Language | ENG-JTITLE |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Yearly Variation of Rain Attenuation Characteristics of Ku-Band Satellite Communications Links in the Tropical Region |
| Sub Title (in English) | |
| Keyword(1) | Satellite communications |
| Keyword(2) | Radio wave propagation |
| Keyword(3) | Ku band |
| Keyword(4) | Rain attenuation |
| Keyword(5) | Up and down link |
| Keyword(6) | Tropical region |
| 1st Author's Name | Yasuyuki Maekawa |
| 1st Author's Affiliation | Osaka Electro-Communication University(Osaka Electro-Commun. Univ.) |
| 2nd Author's Name | Yu Nishimura |
| 2nd Author's Affiliation | Osaka Electro-Communication University(Osaka Electro-Commun. Univ.) |
| 3rd Author's Name | Yoshiaki Shibagaki |
| 3rd Author's Affiliation | Osaka Electro-Communication University(Osaka Electro-Commun. Univ.) |
| Date | 2017-10-26 |
| Paper # | SAT2017-45 |
| Volume (vol) | vol.117 |
| Number (no) | SAT-261 |
| Page | pp.pp.51-54(SAT), |
| #Pages | 4 |
| Date of Issue | 2017-10-19 (SAT) |