Hiroyuki NAKATA

Associate Professor, Department of Electrical and Electronics Engineering, Graduate School of Engineering, Chiba University

Refereed Journals

  • Quantitative Estimation of the Ionospheric Disturbances Associated with Earthquakes observed with HF Doppler by a Numerical Simulation of Neutral Atmospheric Waves: Kouhei Yoshikawa, Kazuto Takaboshi, Hiroyuki Nakata, Toshiaki Takano, Mitsuru Matsumura, Hiroyuki Shinagawa, Ichiro Tomizawa,IEEJ Transactions on Fundamentals and Materials, Vol.136, No.5, pp.259-264 (2016).
  • Spectral density analysis of total electron content perturbations associated with earthquakes: H. Nakata, K. Abe, A. Tokunaga, T. Takano, T. Tsugawa, and M. Nishioka, IEEJ Transactions on Fundamentals and Materials, Vol.136, No.5, pp.272-277 (2016).
  • Estimation of direction of arrival of VHF radio wave by interferometers : H. Nakata, K. Kawai, S. Akiyama, T. Chida, R. Tanaka, Y. Kawamura, T. Takano, and S. Shimakura, IEEJ Transactions on Fundamentals and Materials, Vol.136, No.5, pp.278-285 (2016).
  • Reflection height of daytime tweek atmospherics during the solar eclipse of 22 July 2009 : H. Ohya, F. Tsuchiya, H. Nakata, K. Shiokawa, Y. Miyoshi, K. Yamashita, and Y. Takahashi, Journal of Geophysical Research, Vol.117, No. A11, A11310 (2012).
  • The relationship between signal intensity and maximum observed frequency in long-distance propagation of VHF radio waves based on the reflection from the ionosphere : S. Ujigawa, H. Nakata, and S. Shimakura, Journal of Atmospheric Electricity, Vol.31, No.1, pp.63-70 (2011).
  • Alfvenic-coupling algorithm for global and dynamical magnetosphere-ionosphere coupled system : A. Yoshikawa, H. Nakata, A. Nakamizo, T. Uozumi, M. Itonaga, S. Fujita, K. Yumoto, and T. Tanaka, Journal of Geophysical Research, Vol.115, No.A4, A04211, doi:10.1029/2009JA014924 (2010).
  • Long-distance propagation of VHF radio waves due to the effect of the equatorial anomaly : S. Ujigawa, H. Nakata, and S. Shimakura, Journal of Atmospheric Electricity, Vol.29, No.2, pp.115-123 (2009).
  • Observations of equatorial plasma bubbles using broadcast VHF radio waves : H. Nakata, I. Nagashima, K. Sakata, Y. Otsuka, Y. Akaike, T. Takano, S. Shimakura, K. Shiokawa, and T. Ogawa, Geophysical Research Letters, Vol. 32, No. 17, L17110, doi:10.1029/2005GL023243 (2005).
  • Ray-tracing calculation of VHF radio waves scattered by field-aligned irregularities associated with equatorial plasma bubbles: H. Nakata, Y. Akaike, Y. Otsuka, T. Takano, S. Ujigawa, and I. Nagashima, IEEJ Transactions on Fundamentals and Materials, Vol. 124, No. 12, pp.1253-1254 (2004).
  • Ionospheric electric potentials for substorms calculated from a solar wind- magnetosphere MHD simulation and a magnetogram inversion technique : H. Nakata, M. Shinohara, Y. Kamide, T. Ogino, Journal of Geophysical Research, Vol.109, No.A1, A01211, doi:10.1029/2002JA009743 (2004).
  • Near real-time calculation of ionospheric electric fields and currents using GEDAS: H. Shirai, Y. Kamide, E. A. Kihn, B. Hausman, M. Shinohara, H. Nakata, M. Isowa,   T. K. Takada, Y. Watanabe, and S. Masuda, Chinese Journal of Astronomy and Astrophysics, Vol.3, No.4, pp.375-380 (2003).
  • Multipoint observations of a Pi2 pulsation on morningside: The 20 September 1995 event : M. Nose, K. Takahashi, T. Uozumi, K. Yumoto, Y. Miyoshi, A. Morioka, D.K. Milling, P. R. Sutcliffe, H. Matsumoto, T. Goka, and H. Nakata, Journal of Geophysical Research, Vol. 108, No. A5, doi:10.1029/2002JA009747 (2003).
  • A numerical simulation of the Pi2 pulsations associated with the substorm current wedge : S. Fujita, H. Nakata, M. Itonaga, A. Yoshikawa, T. Mizuta, Journal of Geophysical Research, Vol.107, No. A3, doi:10.1029/2001JA900137 (2002).
  • Propagation property of transient MHD impulses in the magnetosphere-ionosphere system : The 2D model of the Pi2 pulsation : S. Fujita, T. Mizuta, M. Itonaga, A. Yoshikawa and H. Nakata, Geophysical Research Letter, Vol.28, No.11, pp.2161-2164 (2001).
  • Ground magnetic perturbations associated with the standing toroidal mode oscillations in the magnetosphere-ionosphere system : H. Nakata, S. Fujita, A. Yoshikawa, M. Itonaga, and K. Yumoto, Earth, Planets and Space, Vol.52, No.9, pp.601-613 (2000).
  • Relationship between the Pi2 pulsations and the localized impulsive current associated with the current disruption in the magnetosphere : S. Fujita, M. Itonaga, and H. Nakata, Earth, Planets and Space, Vol.52, No.4, pp.267-281 (2000).
  • Eigenmode analysis of field line oscillations interacting with the ionosphere- atmosphere-solid earth electromagnetic coupled system :   A. Yoshikawa, M. Itonaga, S. Fujita, and H. Nakata, Journal of Geophysical Research, Vol.104, No.A12, pp.28437-28457 (1999).


  • TBD