| Presentation | 2016-05-19 Long-term Yearly Variation of Rain Attenuation Statistics in Ku-Band Satellite Communications Links Yasuyuki Maekawa, Hidemi Miura, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | The long-term rain attenuation statistics of cumulative time percentages are obtained from Ku band satellite signal observations conducted at Osaka Electro-Communication University in Neyagawa, Osaka, from 1988 to 2016. The long-term statistics for about 20 years up to 2006 are in very good agreement with the recent ITU-R predictions obtained from the 0.01% rainfall rate, and their 0.01% values indicate fairly large yearly variations which amount to about 20% of each value. Besides the yearly rainfall rate statistics, these variations seem to be caused by those of the equivalent rain path length at each year, which becomes longer as the average ground temperature at rain time from May to October becomes higher. However, the increase of the equivalent rain path length is not simply explained in term of the rise of rain height proportional to the ground temperature, but rather related to the occurrence of rain attenuation due to tropical-type rainfall such as shower and typhoon in summer time. Also, the equivalent path length tends to increase further for the last 10 years since 2006, and this tendency seems to be related to the overall increase of the average ground temperature at rain time in each year. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Satellite communications / Rain attenuation / Rainfall rate / Ku-band / Long-term statistics / Equivalent path length |
| Paper # | AP2016-20 |
| Date of Issue | 2016-05-12 (AP) |
| Conference Information | |
| Committee | AP |
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| Conference Date | 2016/5/19(2days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | kobe Univ. |
| Topics (in Japanese) | (See Japanese page) |
| Topics (in English) | Antennas and Propagation |
| Chair | Keizo Cho(Chiba Inst. of Tech.) |
| Vice Chair | Hisato Iwai(Doshisha Univ.) |
| Secretary | Hisato Iwai(KDDI R&D Labs.) |
| Assistant | Yuichi Kimura(Saitama Univ.) |
| Paper Information | |
| Registration To | Technical Committee on Antennas and Propagation |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Long-term Yearly Variation of Rain Attenuation Statistics in Ku-Band Satellite Communications Links |
| Sub Title (in English) | |
| Keyword(1) | Satellite communications |
| Keyword(2) | Rain attenuation |
| Keyword(3) | Rainfall rate |
| Keyword(4) | Ku-band |
| Keyword(5) | Long-term statistics |
| Keyword(6) | Equivalent path length |
| 1st Author's Name | Yasuyuki Maekawa |
| 1st Author's Affiliation | Osaka Electro-Communication University(Osaka Electro-Commun. Univ.) |
| 2nd Author's Name | Hidemi Miura |
| 2nd Author's Affiliation | Osaka Electro-Communication University(Osaka Electro-Commun. Univ.) |
| Date | 2016-05-19 |
| Paper # | AP2016-20 |
| Volume (vol) | vol.116 |
| Number (no) | AP-43 |
| Page | pp.pp.23-26(AP), |
| #Pages | 4 |
| Date of Issue | 2016-05-12 (AP) |