重力観測点におけるルビジウム発振器の周波数測定  [in Japanese] On-site Frequency Measurements of a Rubidium Oscillator for Gravimeters  [in Japanese]

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Author(s)

    • 望月 一磨 Mochizuki Kazuma
    • 産業技術総合研究所地質調査総合センター|静岡大学大学院総合科学技術研究科 Geological Survey of Japan, AIST|Department of Geosciences, Sizuoka University

Abstract

<p>It is important for precise gravity measurement to calibrate the frequency of a rubidium oscillator as a time frequency standard. We demonstrate simple on-site frequency measurement by using a time frequency calibration tool (FT-001A) with a GPS common view method. We equipped one at the Full Range Seismograph Network of Japan (F-net) Ishigaki (IGK) station, Okinawa, Japan, and measured frequency variation of the internal rubidium oscillator of gPhone gravimeter (#133). As a result, we could measure its frequency with uncertainty of approximately 10<sup>-12</sup> (0.01 mHz) on the gravity station 2,000 km apart from AIST Tsukuba where UTC(NMIJ) is maintained.</p>

<p>It is important for precise gravity measurement to calibrate the frequency of a rubidium oscillator as a time frequency standard. We demonstrate simple on-site frequency measurement by using a time frequency calibration tool (FT-001A) with a GPS common view method. We equipped one at the Full Range Seismograph Network of Japan (F-net) Ishigaki (IGK) station, Okinawa, Japan, and measured frequency variation of the internal rubidium oscillator of gPhone gravimeter (#133). As a result, we could measure its frequency with uncertainty of approximately 10<sup>-12</sup> (0.01 mHz) on the gravity station 2,000 km apart from AIST Tsukuba where UTC(NMIJ) is maintained.</p>

Journal

  • Journal of the Geodetic Society of Japan

    Journal of the Geodetic Society of Japan 63(3), 187-191, 2018

    The Geodetic Society of Japan

Codes

  • NII Article ID (NAID)
    130006728305
  • NII NACSIS-CAT ID (NCID)
    AN00134900
  • Text Lang
    JPN
  • ISSN
    0038-0830
  • NDL Article ID
    029026518
  • NDL Call No.
    Z15-161
  • Data Source
    NDL  J-STAGE 
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