• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

A STUDY ON NETWORK PERFORMANCE QUALITY AND DATA TRANSMISSION EFFCIENCY FOR SATELLITE COMMUNICATIONS IN RAINY CONDITIONS

Research Project

Project/Area Number 14550388
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 情報通信工学
Research InstitutionOSAKA ELECTRO-COMMUNICATION UNIVERSITY

Principal Investigator

MAEKAWA Yasuyuki  Osaka-electro-communication University, Faculty of Eengineering, Professor, 工学部, 教授 (30181572)

Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2004: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2003: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2002: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsSatellite communications / Rain attenuation / Cumulative time percentages / Time duration / Site diversity / Ku band / Ka band / Satellite diversity / 衛生通信回線 / 前線 / 不稼働率
Research Abstract

For the performance of satellite network operations related to the distributions of rain areas in rainy conditions, the effects of satellite diversities are numerically studied using the Ku- and Ku-band rain attenuation data obtained at our university (Neyagawa, Osaka) from the three satellites, SCC,N-Star, and BS, with each separated by 30 deg in azimuth. Using these satellites, the effects of site diversities are also numerically examined among three location, such as the Uji campus of Kyoto University Shigaraki MU observatory and our university with their distances of 20-50 km. The statistics are evaluated during the two years of 2003-2004, using the attenuation data aceumulated at each location. As a result, the yearly time percentages for Ku-band attenuation of 3-4 dB are shown to be reduced from 0.1% to 0.01% by switching operations between the two earth stations using the site diversity techniques. On the other hand, velocities and directions of rain area motions am estimated from the time difference of attenuation occurrence among the three locations. The results of more than 100 rainfall events are compared with those obtained from the cyclones and rainy fronts in weather charts for the past two years. A very good agreement is found between the velocities and directions inferred from the two methods with correlation coefficients of more than 0.9, indicating that the rain cloud motions are just perpendicular to the rain fronts in almost all cases over a horizontal scale of a few 10 km. This nature of rain cloud motions suggests that site and satellite diversity techniques are especially effective when the site or antenna beam locations am aligned in the direction perpendicular to the motion of rain fronts.

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (28 results)

All 2004 2003 Other

All Journal Article (18 results) Publications (10 results)

  • [Journal Article] Ku-band Ions distance site-diversity (SD) characteristics by using new measuring system2004

    • Author(s)
      K.Hatsuda, Y.Aoko, H.Echigo, F.Takahata, Y.Maekawa, K.Fujisaki
    • Journal Title

      IEEE Transactions on Antennas and Propagatation 52・6

      Pages: 1481-1491

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] First Year Results on Rain Attenuation Characteristics of Satellite Links at Equatorial Atmospheric Radar2004

    • Author(s)
      Y.Maekawa, T.Fujiwara, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto
    • Journal Title

      2004 IEEE AP-S International Symposium and USNC/URSI National Radio Science Meeting 2

      Pages: 1660-1663

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Rain Attenuation Statistics in Japan and Indonesia simultaneously observed on the satellite links to equatorial atmospheric radar2004

    • Author(s)
      Y.Maekawa, T.Fujiwara, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto
    • Journal Title

      URSI Commission F Triennium Open Symposium (CDR)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Cumulative Time Percentages of Rainfall Rate and Rain Attenuation Observe on the Satellite Links at Equatorial Atmospheric Radar2004

    • Author(s)
      T.Fujiwara, Y.Maekawa, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto
    • Journal Title

      Proceedings of the 2004 International Symposium on Antennas and Propagation 2

      Pages: 1357-1360

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Ku-band long distance site-diversity (SD) characteristics by using new measuring system2004

    • Author(s)
      K.Hatsuda, Y.Aoko, H.Echigo, F.Takahata, Y.Maekawa, K.Fujisaki
    • Journal Title

      IEEE Transactions on Antennas and Propagatation vol.52, no.6

      Pages: 1481-1491

    • NAID

      120006676984

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] First Year Results on Rain Attenuation Characteristics of Satellite Links at Equatorial Atmospheric Radar2004

    • Author(s)
      Y.Maekawa, T.Fujiwara, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto
    • Journal Title

      2004 IEEE AP-S International Symposium and USNC/URSI National Radio Science Meeting vol.2

      Pages: 1660-1663

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Rain Attenuation Statistics in Japan and Indonesia simultaneously observed on the satellite links to equatorial atmospheric radar2004

    • Author(s)
      Y.Maekawa, T.Fujiwara, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto
    • Journal Title

      URSI Commission F Triennium Open Symposium CDR

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Cumulative Time Percentages of Rainfall Rate and Rain AttenuationObserve on the Satellite Links at Equatorial Atmospheric Radar2004

    • Author(s)
      T.Fujiwara, Y.Maekawa, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto
    • Journal Title

      Proceedings of the 2004 International Symposium on Antennas and Propagation vol.2

      Pages: 1357-1360

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] First Year Results on Rain Attenuation Characteristics of Satellite Links at Equatorial Atmospheric Radar2004

    • Author(s)
      Y.Maekawa, T.Fujiwara, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto
    • Journal Title

      2004 IEEE AP-S International Symposium and USNC/URSI National Radio Science Meeting Radio Science Meeting 2

      Pages: 1660-1663

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Rain Attenuation Statistics in Japan and Indonesia simultaneously observed on the satellite links to equatorial atmospheric radar2004

    • Author(s)
      Y.Maekawa, T.Fujiwara, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto
    • Journal Title

      URSI Commission F Triennium Open symposium CDR

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Cumulative Time Percentages of Rainfall Rate and Rain Attenuation Observe on the Satellite Links at Equatorial Atmospheric Radar2004

    • Author(s)
      Y.Maekawa, T.Fujiwara, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto
    • Journal Title

      Proceedings of the 2004 International Symposium on Antennas and Propagation 2

      Pages: 1357-1360

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Ku-band long distance site-diversity (SD) characteristics by using new measuring system2004

    • Author(s)
      K.Hatsuda, Y.Aoko, H.Echigo, F.Takahata, Y.Maekawa, K.Fujisaki
    • Journal Title

      IEEE Trans.Antennas and Propagat 52・6

      Pages: 1481-1491

    • NAID

      120006676984

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 赤道大気レーダーの衛星回線における2年間の降雨減衰特性2004

    • Author(s)
      藤原正, 前川泰之, 柴垣佳明, 佐藤亨, 山本衛, 橋口浩之, 深尾昌一郎
    • Journal Title

      平成16年度CPEA公開ワークショップ 1(印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 赤道域と温帯における衛星回線の降雨減衰特性の比較検討2004

    • Author(s)
      前川泰之, 藤原正, 柴垣佳明, 佐藤亨, 山本衛, 橋口浩之, 深尾昌一郎
    • Journal Title

      平成16年度CPEA公開ワークショップ (印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Meso-α-scale wind field and precipitating clouds in Typhoon 9426 (Orchid) observed by MU radar2003

    • Author(s)
      Y.Shibagaki, M.D.Yamanaka, M.Fukase, H.Hashiguchi, Y.Maekawa, S.Fukao
    • Journal Title

      Journal of the Meteorological Society of Japan 81・2

      Pages: 211-228

    • NAID

      110001802984

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Multi-wavelength radar observations of wintertime thunder clouds related to the polarity of the lightning discharges2003

    • Author(s)
      Y.Maekawa, S.Ogata, Y.Shibagaki, Y.Sonoi, M.Teshiba, H.Hashiguchi, S.Fukao
    • Journal Title

      Proceedings of 12th International Conference on Atmospheric Electricity 2

      Pages: 13-16

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Meso-α-scale wind field and precipitating clouds in Typhoon 9426(Orchid) observed by MU radar2003

    • Author(s)
      Y.Shibagaki, M.D.Yamanaka, M.Fukase, H.Hashiguchi, Y.Maekawa, S.Fukao
    • Journal Title

      Journal of the Meteorological Society of Japan vol.81, no.1

      Pages: 211-228

    • NAID

      110001802984

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Multi-wavelength radar observations of wintertime thunder clouds related to the polarity of the lightning discharges2003

    • Author(s)
      Y.Maekawa, S.Ogata, Y.Shibagaki, Y.Sonoi, M.Teshiba, H.Hashiguchi, S.Fukao
    • Journal Title

      Proceedings of 12th International Conference on Atmospheric Electricity vol.2

      Pages: 13-16

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Y.Maekawa, S.Ogata, Y.Shibagaki, Y.Sonoi, M.Teshiba, H.Hashiguchi, S.Fukao: "Multi-wavelength radar observation of wintertime thunder clouds related to the polarity of the lightning discharges"Proceeding of 12th International Conference on Atmospheric Electricity. 1. 13-16 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Sonoi, Y.Maekawa, Z-I.Kawasaki, S.Fukao: "Correlation coefficients between disturbance indexes and updraft associated with lightning discharges observed at two kinds of radars and SAFIR"Proceeding of 12th International Conference on Atmospheric Electricity. 1. 245-248 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Maekawa, Fujiwara, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto, S.Fukao: "Effects of Rainfall on Satellite Communication Links from the Equatorial Radar to Japan"XXIII General Assembly of the International Union of Geodesy and Geophysics. Week A. 390-391 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 前川泰之, 藤原正, 柴垣佳明, 佐藤亨, 山本衛, 橋口浩之, 深尾昌一郎: "赤道大気レーダーにおける衛星通信回線の降雨減衰測定"平成15年度CPEA公開ワークショップ. 1(印刷中). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Maekawa, Fujiwara, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto, S.Fukao: "First Year Results on Rain Attenuation Characteristics of Satellite Links at Equatorial Atmospheric Radar"2004 IEEE AP-S International Symposium and USNC/URSI National Radio Science Meeting. (In press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Maekawa, Fujiwara, Y.Shibagaki, T.Sato, H.Hashiguchi, M.Yamamoto, S.Fukao: "Cumulative Time Percentages of Rainfall Rate and Rain Attenuation Observe on the Satellite Links at Equatorial Atmospheric Radar"Proceedings of the 2004 International Symposium on Antennas and Propagation. (In press). (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Shibagaki Y.M.D.Yamanaka, M.Fukase, H.Hashiguchi, Y.Maekawa, S.Fukao: "Meso-alpha-scale wind field and precipitating clouds in typhoon 9426 (Orchid)"J. Meteor. Soc. Japan.. (in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Maekawa, Y.: "A study on the effects of satellite diversity on Ka-band rain attenuation in three earth-space paths"XXVIIth General Assembly of the International Union of Radio Science. FP, F.7(CD-R). (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Ogata, S., Y.Shibagaki, Y.Maekawa, Y.Sonoi, M.Teshiba, H.Hashiguchi, S.Fukao: "C-band and Millimeter-wave Radar Observations of Wintertime Thunder Clouds related to the Polarity of the Lightning Discharges"International Conference on Mesoscale Convective Systems and Heavy Rainfall/Snowfall in East Asia. 1. 481-484 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Maekawa, Y., Y.Shibagaki, O.Ogata, Y.Sonoi, M.Teshiba, H.Hashiguchi, S.Fukao: "Simultaneous Observations of Wintertime Thunder Clouds using Millimeter-wave and C-band Radars along the Coast of Mikuni"International Conference on Mesoscale Convective Systems and Heavy Rainfall/Snowfall in East Asia. 1. 398-401 (2002)

    • Related Report
      2002 Annual Research Report

URL: 

Published: 2002-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi