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Development of a data processing and distribution system for total electron content data of a GPS receiver network

Research Project

Project/Area Number 12554016
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Space and upper atmospheric physics
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

YAMAMOTO M  Kyoto University, Radio Science Center for Space and Atmosphere, Associate Professor, 宙空電波科学研究センター, 助教授 (20210560)

Co-Investigator(Kenkyū-buntansha) OTSUKA Y  Nagoya University, Solar-Terrestrial Environment Laboratory, Research Associate, 太陽地球環境研究所, 助手 (40314025)
IYEMORII T  Kyoto University, Data Analysis Center for Geomagnetism and Space Magnetism, Professor, 大学院・理学研究科附属地磁気世界資料解析センター, 教授 (40144315)
FUKAO S  Kyoto University, Radio Science Center for Space and Atmosphere, Professor, 宙空電波科学研究センター, 教授 (30026249)
宮崎 真一  国土地理院, 地理地殻活動研究センター, 研究員
OGAWA T  Nagoya University, Solar-Terrestrial Environment Laboratory, Professor, 太陽地球環境研究所, 教授 (60271607)
MIYAZAKI S  Geographical Survey Institute, Research Scientist
Project Period (FY) 2000 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥9,700,000 (Direct Cost: ¥9,700,000)
Fiscal Year 2001: ¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2000: ¥6,000,000 (Direct Cost: ¥6,000,000)
KeywordsGPS / Ionosphere / TEC / GEONET / Data base / TID / Totale Electron Content / 中緯度電離圏 / 電離圏全電子数 / 電離圏伝搬性擾乱 / GPS受信機網 / GPS-TEC / TECデータベース / FRONTキャンペーン
Research Abstract

A system to derive and distribute Total Electron Content (TEC) data over Japan was developed using the observational data of GEONET, a GPS receiver network operated by Geographical Survey Institute. GEONET obtains positioning data from GPS satellites in every 30 seconds at about 1000 receivers. The observed positioning data were converted to vertical TEC considering the geometry between the line-of-sight and the ionosphere. To reduce errors caused by this conversion, the data with low elevation angles were omitted in this process. Using this GEONET TEC data, two-dimensional distribution of TEC over Japan was derived with 30 seconds of temporal resolution and 0.15 degrees of spatial resolution in latitude and longitude. The accuracy of the derived TEC was estimated to be 2-4x10^<16> electron/m^2. Electrical biases inside of the transmitters and receivers were estimated and subtracted from the observed TEC data with the least-square fitting method. All of GEONET data since April in 1999 … More were processed with this method and newly obtained data are also processed every day. The derived TEC data are stored in a data base and can be accessed through WWW at http://stegps.kugi.kyoto-u.ac.jp/. Four types of data are provided in this data base : ATEC (absolute value of TEC for each receiver), TEC (TEC data for each receiver containing biases), AGRJD (two-dimensional distribution of absolute TEC over Japan) and GRID (two-dimensional distribution of perturbation TEC). Two-dimensional maps of TEC are also stored in the data base. The data base has interactive plot pages to make plots of TEC at any given dates and positions. Using this data base, several studies on the mid-latitude ionosphere were carried out. The medium-scale traveling ionospheric disturbances were detected by the GEONET TEC data and compared with the data by the other measurements, such as air-glow imagers and the MU radar. Ionospheric disturbances during the geomagnetic storm periods were studied in detail with GEONET TEC data. Less

Report

(3 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] A.Saito 他7名: "Observations of traveling ionospheric disturbances and 3-m scale irregularities in the nighttime F-region ionosphere with the MU radar and a GPS network"Earth Planets and Space. 54. 31-44 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y.Otsuka他5名: "A new technique for mapping of total electron content using GPS network in Japan"Earth Planets and Space. 54. 63-70 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Y.Sahai他7名: "Imagine observations of midlatitude ionospheric disturbances during the geomagnetic storm of February 12, 2000"Journal of Geophysical Research. 106. 24,481-24,492 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] T.Ogawa他6名: "Observations and modeling of 630 nm airglow and total electron content associated with traveling ionospheric disturbances over Shigaraki, Japan"Earth Planets and Space. 54. 45-56 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Noguchi他3名: "Application of the GPS network to estimate the effect of the terrestrial ionosphere on the radio occultation measurements of planetary ionospheres"Radio Science. 36. 1607-1613 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] K.Shinokawa他9名: "Imaging observations of the equatorward limit of midlatitude traveling ionospheric disturbances"Earth Planets and Space. 54. 57-62 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Saito, A., M. Nishimura, M. Yamamoto, S. Fukao, T. Tsugawa, Y. Otsuka, S. Miyazaki, and M.C. Kelley: "Observations of traveling ionospheric disturbances and 3-m scale irregularities in the nighttime F-region ionosphere with the MU radar and a GPS network"Earth Plannets and Space. Vol.54. .31-44 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Otsuka, Y., T. Ogawa, A. Saito, T. Tsugawa, S. Fukao, and S. Miyazaki: "A new technique for mapping of total electron content using GPS network in Japan"Earth Planets and Space. Vol.54. .63-70 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Sahai, Y., K. Shiokawa, Y. Otsuka, C. Ihara, T. Ogawa, K. Igarashi, S. Miyazaki, A. Saito: "Imaging observations of midlatitude ionosheric disturbances during the geomagnetic storm of February 12, 2000"Journal of Geophysical Research. Vol.106, No.24. .481-24, 492 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Ogawa, T., N. Balan, Y. Otsuka, K. Shiokawa, C. Ihara, T. Shimomai, and A. Saito: "Observations and modeling of 630 nm airglow and total electron content associated with traveling ionospheric disturbances over Shigaraki, Japan"Earth Planets and Space. Vol.54. .45-56 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Noguchi, K., T. Imamura, K.-I. Oyama, A. Saito: "Application of the GPS network to estimate the effect of the terrestrial ionosphere on the radio occultation measurements of planetary ionospheres"Radio Science. Vol.36. .1607-1613 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Shiokawa, K., Y. Otsuka, M.K. Ejiri, Y. Sahai, T. Kadota, C. Ihara, T. Ogawa, K. Igarashi, S. Miyazaki, and A. Saito: "Imaging observations of the equatorward limit of midlatitude traveling ionospheric disturbances"Earth Planets and Space. Vol.54. .57-62 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] Saito, A., M.Nishimura, M.Yamamoto, S.Fukao 他: "Traveling Ionospheric Disturbances Detected in the FRONT Campaign"Geophys.Res.Lett.. 28・4. 689-692 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Zhang, S.-R., W.L.Oliver, S.Fukao, S.Kawamura: "Extraction of Solar and Thermospheric Information from the Ionospheric Electron Density Profile"J.Geophys.Res.. 106・A7. 12821-12836 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Otsuka Y, Ogawa T, Saito A, Tsugawa T, Fukao S 他: "A new technique for mapping of total electron content using GPS network in Japan"Earth Planets Space. 54・1. 63-70 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Saito A, Nishimura M, Yamamoto M, Fukao S: "Observations of traveling ionospheric disturbances and 3-m scale irregularities in the nighttime F-region ionosphere with the MU radar and a GPS network"Earth Planets Space. 54・1. 31-44 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Maruyama, T., K.Nozaki, M.Yamamoto, S.Fukao: "Ionospheric Height Changes at Two Closely Separated Equatorial Stations and Implications in Spread F Onsets"J.Atmos.Solar Terr.Phys.. (印刷中). (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] P.B.Rao,M.Yamamoto 他: "MU Radar Observations of Kilometer-Scale Waves in the Midlatitude Lower Region"Geophys.Res.Lett.. 27・22. 3667-3670 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] S.Kawamura,S.Fukao 他: "A Climatology of MU Radar Observations of Thermospheric Winds"J.Geophys.Res.. 105・A6. 12777-12788 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] R.T.Tsunoda,S.Fukao 他: "SEEK S310-25 : Quasi-Periodic Echoes and Polarization Electric Fields"Geophys.Res.Lett.. 27・20. 3281-3284 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] L.M.Kagan,T.Ogawa 他: "A Role of Neutral Motions in Formation of Midlatitude E-Region Field-Aligned Irregularities"Geophys.Res.Lett.. 27・7. 939-942 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] N.Balan,Y.Otsuka 他: "Annual variations of the ionosphere : a review based on MU radar observations"Adv.Space Res.. 25. 153-162 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] A.Saito,M.Yamamoto 他: "Traveling ionospheric disturbances detected in the FRONT campaign"Geophys.Res.Lett.. 28・4. 689-692 (2001)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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