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

Development of Precision Time and Frequency Comparison System Using a Broadcasting Satellite

Research Project

Project/Area Number 59850055
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field 電子通信系統工学
Research InstitutionHokkaido University

Principal Investigator

OGAWA Yasutaka  Faculty of Engineering, Hokkaido University Associate Prof., 工学部, 助教授 (70125293)

Co-Investigator(Kenkyū-buntansha) OHMIYA Manabu  Faculty of Engineering, Hokkaido University Instructors, 工学部, 助手 (30160625)
ITOH Kiyohiko  Faculty of Engineering, Hokkaido University Prof., 工学部, 教授 (30001176)
Project Period (FY) 1984 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥6,200,000 (Direct Cost: ¥6,200,000)
Fiscal Year 1986: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1985: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1984: ¥4,200,000 (Direct Cost: ¥4,200,000)
KeywordsTime / Frequency / Remote Comparison / Broadcasting Satellite / Synchronization Pulse / Color Subcarrier / Doppler Shift / 軌道予測値 / 精密遠隔比較 / 同期パルス / 標準供給
Research Abstract

We may compare time and frequency precisely over long distance by using a synchronization pulse and color subcarrier in a television signal. The purpose of this research was to realize precision time and frequency comparison by means of a satellite broadcasting television signal. We obtained the following results.
1. Time comparison was carried out between Hokkaido University ( Sapporo ) and the Radio Research Laboratories, Ministry of Posts and Telecommunications ( Tokyo ) using the broadcasting satellite BS-2a. We corrected the delay time difference of both measurement systems. Furthermore, we corrected the difference of propagation delay time from the broadcasting satellite using predicted orbital data. Then, it was shown that the accuracy of about 0.1 <micro> sec is achieved by the broadcasting satellite. It was also shown that if we use the same measurement system in both of the receiving points, the precision of about 10nsec is realized.
2. Frequency comparison was carried out between Hokkaido University and Kagoshima University ( Kagoshima ) using the broadcasting satellite BS-2a. The Doppler shift arises because the broadcasting satellite drifts around the geostationary orbit. The Doppler shift values are different in Sapporo and Kagoshima. Then, the frequency comparison error ( df/f ) amounts to a few parts in <10^(10)> due to the residual Doppler shift. However, it was shown that if we correct the measured results using the predicted orbital data of the broadcasting satellite, the error is in the order of <10^(-11)> .
3. This comparison method is realized by inexpensive satellite broadcasting receiving sets and simple pulse and subcarrier extractors. Then, it may be said that the method is advantageous from the view point of economy and widespread availability.

Report

(2 results)
  • 1986 Final Research Report Summary
  • 1985 Annual Research Report
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 佐々木正巳: 電子通信学会 技術研究報告. A.P84-17. 31-38 (1984)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 佐々木正巳: 電子通信学会 論文誌B. J68-B. 267-273 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 佐々木正巳: 電子通信学会 技術研究報告. A.P86-93. 29-34 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 佐々木正巳: 電子情報通信学会 論文誌B. J70-B. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Masami SASAKI: "Precision Remote Comparison of Frequency by means of a TV Signal" Paper of Technical Group, IECE Japan. A・P84-17. 31-38 (1984)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Masami SASAKI: "Precision Remote Comparison of Frequency by means of a Terrestrial TV Signal" Transactions of IECE Japan, Part B. J68-B. 267-273 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Masami SASAKI: "Precision Remote Comparison of Time by means of a TV Signal via a Broadcasting Satellite" Paper of Technical Group, IECE Japan. A・P86-93. 29-34 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Masami SASAKI: "Precision Remote Comparison of Time by means of a TV Signal via a Broadcasting Satellite" Transactions of IEICE, Japan Part B. J70-B. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 昭和60年度電気関係学会北海道支部連合大会. 13. (1985)

    • Related Report
      1985 Annual Research Report
  • [Publications] 昭和60年度電気関係学会北海道支部連合大会. 14. (1985)

    • Related Report
      1985 Annual Research Report

URL: 

Published: 1987-03-31   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi