140 citations · 635 across the 16 of their papers we have counts for
16 papers
Magnetohydrodynamic simulation of coronal mass ejections using interplanetary scintillation data observed from radio sites ISEE and LOFAR
Kazumasa Iwai, Richard A. Fallows, Mario M. Bisi +4
Interplanetary scintillation (IPS) is a useful tool for detecting coronal mass ejections (CMEs) throughout interplanetary space. Global magnetohydrodynamic (MHD) simulations of the…
Validation of Coronal Mass Ejection Arrival-Time Forecasts by Magnetohydrodynamic Simulations based on Interplanetary Scintillation Observations
Kazumasa Iwai, Daikou Shiota, Munetoshi Tokumaru +3
Coronal mass ejections (CMEs) cause various disturbances of the space environment; therefore, forecasting their arrival time is very important. However, forecasting accuracy is hin…
Development of a coronal mass ejection arrival time forecasting system using interplanetary scintillation observations
Kazumasa Iwai, Daikou Shiota, Munetoshi Tokumaru +3
Coronal mass ejections (CMEs) cause disturbances in the environment of the Earth when they arrive at the Earth. However, the prediction of the arrival of CMEs still remains a chall…
Comparative Study of Microwave Polar Brightening, Coronal Holes, and Solar Wind Over the Solar Poles
Ken'ichi Fujiki, Kiyoto Shibasaki, Seiji Yashiro +3
We comparatively studied the long-term variation (1992-2017) in polar brightening observed with the Nobeyama Radioheliograph, the polar solar wind velocity with interplanetary scin…
The response of the terrestrial bow shock and magnetopause of the long term decline in solar polar fields
Madhusudan Ingale, P. Janardhan, K. Fujiki +2
The location of the terrestrial magnetopause (MP) and it's subsolar stand-off distance depends not only on the solar wind dynamic pressure and the interplanetary magnetic field (IM…
Relationship Between Solar Wind Speed and Coronal Magnetic Field Properties
Ken'ichi Fujiki, Munetoshi Tokumaru, Tomoya Iju +2
We have studied the relationship between the solar-wind speed and the coronal magnetic-field properties (a flux expansion factor [] and photospheric magnetic-field strengt…
A Twenty Year Decline in Solar Photospheric Magnetic Fields: Inner-Heliospheric Signatures and Possible Implications?
P. Janardhan, Susanta Kumar Bisoi, S. Ananthakrishnan +4
We report observations of a steady 20 year decline of solar photospheric fields at latitudes 45 starting from 1995. This prolonged and continuing decline, combi…
Plasma distribution of Comet ISON (C/2012 S1) observed using the radio scintillation method
Tomoya Iju, Shinsuke Abe, Munetoshi Tokumaru +1
We report the electron density in a plasma tail of Comet ISON (C/2012 S1) derived from interplanetary scintillation (IPS) observations during November 1--28, 2013. Comet ISON showe…
Kinematic Properties of Slow ICMEs and an Interpretation of a Modified Drag Equation for Fast and Moderate ICMEs
T. Iju, M. Tokumaru, K. Fujiki
We report kinematic properties of slow interplanetary coronal mass ejections (ICMEs) identified by SOHO/LASCO, interplanetary scintillation, and in-situ observations, and propose a…
Radial Speed Evolution of Interplanetary Coronal Mass Ejections During Solar Cycle 23
Tomoya Iju, Munetoshi Tokumaru, Ken'ichi Fujiki
We report radial speed evolution of interplanetary coronal mass ejections (ICMEs) detected by the SOHO/LASCO coronagraph, interplanetary scintillation (IPS) at 327 MHz, and in-situ…
Solar parameters for modeling interplanetary background
M. Bzowski, J. M. Sokol, M. Tokumaru +6
The goal of the Fully Online Datacenter of Ultraviolet Emissions (FONDUE) Working Team of the International Space Science Institute in Bern, Switzerland, was to establish a common…
Heliolatitude and time variations of solar wind structure from in situ measurements and interplanetary scintillation observations
J. M. Sokol, M. Bzowski, M. Tokumaru +2
The 3D structure of solar wind and its evolution in time is needed for heliospheric modeling and interpretation of energetic neutral atoms observations. We present a model to retri…
The Prelude to the Deep Minimum between Solar Cycles 23 and 24: Interplanetary Scintillation Signatures in the Inner Heliosphere
P. Janardhan, Susanta Kumar Bisoi, S. Ananthakrishnan +2
Extensive interplanetary scintillation (IPS) observations at 327 MHz obtained between 1983 and 2009 clearly show a steady and significant drop in the turbulence levels in the entir…
Is the Polar Region Different from the Quiet Region of the Sun?
Hiroaki Ito, Saku Tsuneta, Daikou Shiota +2
Observations of the polar region of the Sun are critically important for understanding the solar dynamo and the acceleration of solar wind. We carried out precise magnetic observat…
Evolution of Anemone AR NOAA 10798 and the Related Geo-Effective Flares and CMEs
Ayumi Asai, Kazunari Shibata, Takako T. Ishii +4
We present a detailed examination of the features of the Active Region (AR) NOAA 10798. This AR generated coronal mass ejections (CMEs) that caused a large geomagnetic storm on 24…
International Colloquium "Scattering and Scintillation in Radio Astronomy" was held on June 19-23, 2006 in Pushchino, Moscow region, Russia
V. I. Shishov, W. A. Coles, B. J. Rickett +52
Topics of the Colloquium: a) Interplanetary scintillation b) Interstellar scintillation c) Modeling and physical origin of the interplanetary and the interstellar plasma turbulence…