Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Tatsuhiro, Yokoyama"'
Autor:
Tatsuhiro Yokoyama
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
Equatorial plasma bubbles (EPBs) in the ionospheric F region are notorious for causing severe scintillation in radio signals, posing significant challenges for communication and navigation systems. Understanding and forecasting EPB occurrence is cruc
Externí odkaz:
https://doaj.org/article/161e0d84e6ea427084418b9f9b060fb0
Publikováno v:
Earth, Planets and Space, Vol 76, Iss 1, Pp 1-2 (2024)
Externí odkaz:
https://doaj.org/article/0fa6e774bf1344cf926a878b3706aeb6
Publikováno v:
Earth, Planets and Space, Vol 75, Iss 1, Pp 1-8 (2023)
Abstract Ionospheric structure is characterized by the space–time variation of electron density. However, our understanding of the physical processes that initiate and sustain intermediate-scale structure development does not relate directly to sta
Externí odkaz:
https://doaj.org/article/6481b9297a7d461aa3e38f642f5bfde2
Publikováno v:
Earth, Planets and Space, Vol 74, Iss 1, Pp 1-6 (2022)
Abstract The occurrence characteristics of 150-km echoes in low-latitude regions are studied using the Equatorial Atmosphere Radar (EAR) in Indonesia. The long-term observation of the 150-km echoes by the EAR enables us to study the occurrence charac
Externí odkaz:
https://doaj.org/article/a08c8ef2eef64cb3b79fe1664d7ed6b0
Publikováno v:
Earth, Planets and Space, Vol 74, Iss 1, Pp 1-17 (2022)
Abstract Observations and theoretical analysis on the night-time mid-latitude ionospheric irregularities support the postulation of frequently coupled E and F regions. In this paper, we attempt at asserting this notion while using total electron cont
Externí odkaz:
https://doaj.org/article/876274a2a310457aa7ade643f03f2610
Autor:
Lianhuan Hu, Guozhu Li, Zonghua Ding, Wenjie Sun, Xiukuan Zhao, Haiyong Xie, Zhengping Zhu, Tatsuhiro Yokoyama, Jiaping Lan, Zhaoguo Huang, Baiqi Ning
Publikováno v:
Remote Sensing, Vol 14, Iss 22, p 5811 (2022)
By using fast ionogram observations, we report the first simultaneous observations of ascending ion layers at equatorial and low latitudes. The ionosonde measurements at Sanya (18.3°N, 109.6°E; dip lat. 12.2°N) and Chumphon (10.7°N, 99.4°E; dip
Externí odkaz:
https://doaj.org/article/f3859bf1bfd64530b535b056dee5e7a9
Publikováno v:
Progress in Earth and Planetary Science, Vol 5, Iss 1, Pp 1-13 (2018)
Abstract Manifestations of severe nighttime equatorial ionospheric disturbances have been observed for decades. It is generally accepted that the phenomena are caused by large depletions, referred to as equatorial plasma bubbles (EPBs), which are ini
Externí odkaz:
https://doaj.org/article/575efb29687e468d85cb725b2fed710f
Autor:
Hiroyuki Shinagawa, Hidekatsu Jin, Yasunobu Miyoshi, Hitoshi Fujiwara, Tatsuhiro Yokoyama, Yuichi Otsuka
Publikováno v:
Progress in Earth and Planetary Science, Vol 5, Iss 1, Pp 1-14 (2018)
Abstract The linear growth rates of the Rayleigh-Taylor (R-T) instability in the ionosphere from 2011 to 2013 were obtained with a whole atmosphere-ionosphere coupled model GAIA (ground-to-topside model of atmosphere and ionosphere for aeronomy). The
Externí odkaz:
https://doaj.org/article/aac138790e344f748346bc543bfbd6a1
Autor:
Brett A. Carter, S. Tulasi Ram, Endawoke Yizengaw, Rezy Pradipta, John Retterer, Robert Norman, Julie Currie, Keith Groves, Ronald Caton, Michael Terkildsen, Tatsuhiro Yokoyama, Kefei Zhang
Publikováno v:
Progress in Earth and Planetary Science, Vol 5, Iss 1, Pp 1-12 (2018)
Abstract This contribution is the first of a two-part investigation into an unseasonal post-sunset equatorial F-region irregularity (EFI) event over the Southeast Asian region on the evening of 28 July 2014. Ground-based GPS scintillation data, space
Externí odkaz:
https://doaj.org/article/d9b17b7fed24400eb28729d9cb246edc
Autor:
Tatsuhiro Yokoyama
Publikováno v:
Progress in Earth and Planetary Science, Vol 4, Iss 1, Pp 1-13 (2017)
Abstract Equatorial plasma bubbles (EPBs) have been a longstanding and increasingly important subject because they cause severe scintillations in radio waves from Global Navigation Satellite System satellites. The phenomenon was found in the 1930s as
Externí odkaz:
https://doaj.org/article/b52476a522cf4ff3aecae332797e47e4