T. Ogawa

发表

Review of the accomplishments of mid-latitude Super Dual Auroral Radar Network (SuperDARN) HF radars

M. Lester, R. Greenwald, E. Thomas, 2019, Progress in Earth and Planetary Science.

Geomagnetic conjugate observations of medium‐scale traveling ionospheric disturbances at midlatitude using all‐sky airglow imagers

K. Shiokawa, Y. Otsuka, T. Ogawa, 2004 .

Geomagnetic conjugate observation of nighttime medium‐scale and large‐scale traveling ionospheric disturbances: FRONT3 campaign

M. Yamamoto, Takuji Nakamura, T. Maruyama, 2005 .

Climatological study of GPS total electron content variations caused by medium‐scale traveling ionospheric disturbances

Y. Otsuka, T. Ogawa, A. Saito, 2006 .

Dynamic variations of a convection flow reversal in the subauroral postmidnight sector as seen by the SuperDARN Hokkaido HF radar

R. Kataoka, Y. Miyoshi, Y. Ebihara, 2007 .

Radiation fields of energetic electrons in helical orbits within a magneto-active plasma

T. Ogawa, K. Sakurai, T. Ogawa, 1969 .

Giant ionospheric disturbances observed with the SuperDARN Hokkaido HF radar and GPS network after the 2011 Tohoku earthquake

K. Shiokawa, N. Nishitani, T. Ogawa, 2012, Earth, Planets and Space.

Ionospheric and atmospheric disturbances around Japan caused by the eruption of Mount Pinatubo on 15 June 1991

H. Kuroiwa, T. Ogawa, K. Igarashi, 1994 .

Ionospheric scintillations observed by satellite beacons in the VHF-20 GHZ frequency range : Ionospheric Disturbances during November 30-december 1, 1988

T. Ogawa, I. Nishimuta, H. Mitsudome, 1992 .

Two‐dimensional observations of overshielding during a magnetic storm by the Super Dual Auroral Radar Network (SuperDARN) Hokkaido radar

M. Fok, Y. Ebihara, N. Nishitani, 2008 .

Spatial relationship of nighttime medium‐scale traveling ionospheric disturbances and F region field‐aligned irregularities observed with two spaced all‐sky airglow imagers and the middle and upper atmosphere radar

T. Yokoyama, M. Yamamoto, K. Shiokawa, 2009 .

Integrating-sphere calibration of all-sky cameras for nightglow measurements

K. Shiokawa, M. Satoh, Y. Katoh, 2000 .

Simultaneous ground and satellite observations of an isolated proton arc at subauroral latitudes

K. Shiokawa, Y. Otsuka, K. Sakaguchi, 2006 .

Simultaneous appearance of isolated auroral arcs and Pc 1 geomagnetic pulsations at subauroral latitudes

K. Shiokawa, Y. Otsuka, K. Sakaguchi, 2008 .

The Optical Mesosphere Thermosphere Imagers (OMTIs) for network measurements of aurora and airglow

K. Shiokawa, Y. Otsuka, K. Sakaguchi, 2009 .

Spatial relationship of equatorial plasma bubbles and field‐aligned irregularities observed with an all‐sky airglow imager and the Equatorial Atmosphere Radar

T. Yokoyama, M. Yamamoto, S. Fukao, 2004 .

Thermospheric wind during a storm‐time large‐scale traveling ionospheric disturbance

S. Kawamura, M. Yamamoto, Takuji Nakamura, 2003 .

Discussion of paper by G. Atkinson, ‘Auroral arcs: Result of the interaction of a dynamic magnetosphere with the ionosphere’

Tetsuya Sato, T. Ogawa, 1972 .

A Multi-Instrument Measurement of a Mesospheric Front-Like at the Equator Structure

J. Russell, Takuji Nakamura, K. Shiokawa, 2006 .

A Multi-Instrument Measurement of a Mesospheric Bore at the Equator

J. Russell, M. Mlynczak, Takuji Nakamura, 2005 .

Plasma density suppression process around the cusp revealed by simultaneous CUTLASS and EISCAT Svalbard radar observations

M. Lester, N. Nishitani, T. Ogawa, 2001 .

Implications of statistics of near-range Doppler velocity observed with the Syowa East HF radar

N. Nishitani, T. Ogawa, A. Yukimatu, 2001 .

Is there a plasma density gradient role on the generation of short-scale Farley-Buneman waves?

T. Ono, T. Ogawa, K. Schlegel, 2005 .

Middle and upper atmosphere radar observations of turbulence and movement of midlatitude sporadic E irregularities

M. Yamamoto, S. Fukao, T. Ogawa, 1995 .

A morphological study on mid-latitude E-region field-aligned irregularities observed with the MU radar

M. Yamamoto, T. Tsuda, S. Fukao, 1992 .

Relationship between propagation direction of gravity waves in OH and OI airglow images and VHF radar echo occurrence during the SEEK-2 campaign

M. Yamamoto, S. Fukao, K. Shiokawa, 2005 .

A study of the dusk convection cell's response to an IMF southward turning

J. Villain, G. Sofko, N. Nishitani, 2002 .

Observations of equatorial plasma bubbles using broadcast VHF radio waves

Y. Otsuka, T. Ogawa, H. Nakata, 2005 .

Ground and satellite observations of nighttime medium‐scale traveling ionospheric disturbance at midlatitude

K. Shiokawa, Y. Otsuka, T. Ogawa, 2003 .

ETS-II Experiments Part V: Effect of Ionosphere

M. Fujita, J. Awaka, T. Ogawa, 1980, IEEE Transactions on Aerospace and Electronic Systems.

Comprehensive imaging observations of midlatitude ionospheric disturbances during storm time substorms

K. Shiokawa, Y. Otsuka, T. Ogawa, 2000 .

Equatorial GPS ionospheric scintillations over Kototabang, Indonesia and their relation to atmospheric waves from below

Takuji Nakamura, K. Shiokawa, Y. Otsuka, 2009 .

Ionospheric Disturbances Over Indonesia and Their Possible Association With Atmospheric Gravity Waves From the Troposphere( CPEA-Coupling Processes in the Equatorial Atmosphere)

K. Shiokawa, Y. Otsuka, T. Ogawa, 2006 .

Severe disturbances of VHF and GHz waves from geostationary satellites during a magnetic storm

M. Fujita, J. Awaka, T. Ogawa, 1980 .

On the gravity wave-driven instability of E layer at mid-latitude

Y. Otsuka, T. Ogawa, S. Shalimov, 2009 .

Ionospheric Pc5 plasma oscillations observed by the King Salmon HF radar and their comparison with geomagnetic pulsations on the ground and in geostationary orbit

T. Obara, T. Nagatsuma, K. Sakaguchi, 2012 .

Ground observation and AMIE‐TIEGCM modeling of a storm‐time traveling ionospheric disturbance

M. Yamamoto, K. Shiokawa, Y. Otsuka, 2007 .

A concentric gravity wave structure in the mesospheric airglow images

Takuji Nakamura, K. Shiokawa, Y. Otsuka, 2007 .

Gravity wave momentum flux in the upper mesosphere derived from OH airglow imaging measurements

Takuji Nakamura, K. Shiokawa, Y. Otsuka, 2007 .

Seasonal variations of medium‐scale gravity wave parameters in the lower thermosphere obtained from spectral airglow temperature imager observations at Shigaraki, Japan

K. Shiokawa, T. Ogawa, N. Gavrilov, 2002 .

Small‐scale gravity waves near the mesopause observed by four all‐sky airglow imagers

Takuji Nakamura, T. Tsuda, K. Shiokawa, 2001 .

Simultaneous Measurements of Antarctic Mesospheric Gravity Waves by Meteor Radar and Lidar

A. Nomura, T. Ogawa, Takashi Tanaka, 1989 .

Dynamic temporal evolution of polar cap tongue of ionization during magnetic storm

K. Shiokawa, Y. Otsuka, M. Hairston, 2010 .

Unusually elongated, bright airglow plume in the polar cap F region: Is it a tongue of ionization?

Y. Otsuka, M. Hairston, T. Ogawa, 2009 .

Simultaneous middle and upper atmosphere radar and ionospheric sounder observations of midlatitude E region irregularities and sporadic E layer

M. Yamamoto, Y. Otsuka, K. Kita, 2002 .

Disappearance of equatorial plasma bubble after interaction with mid‐latitude medium‐scale traveling ionospheric disturbance

Y. Otsuka, T. Ogawa, K. Shiokawa, 2012 .

An intense gravity wave near the mesopause region observed by a Fabry‐Perot interferometer and an airglow imager

Takuji Nakamura, K. Shiokawa, Y. Otsuka, 2007 .

Multi‐point observation of short‐period mesospheric gravity waves over Japan during the FRONT Campaign

Y. Otsuka, T. Ogawa, K. Igarashi, 2000 .

Simultaneous ground- and satellite-based airglow observations of geomagnetic conjugate plasma bubbles in the equatorial anomaly

K. Shiokawa, Y. Otsuka, S. Mende, 2005 .

Comparison of OH rotational temperatures measured by the spectral airglow temperature imager (SATI) and by a tilting-filter photometer

H. Takahashi, Takuji Nakamura, K. Shiokawa, 2004 .

Statistical study of short-period gravity waves in OH and OI nightglow images at two separated sites

Takuji Nakamura, T. Tsuda, K. Shiokawa, 2003 .

Simultaneous PMC and PMSE observations with a ground-based lidar and SuperDARN HF radar at Syowa Station, Antarctica

Takuji Nakamura, Hidehiko Suzuki, Y. Tomikawa, 2013 .

Thermospheric winds over Japan: Comparison of ionosonde and radar measurements

S. Fukao, T. Ogawa, W. Oliver, 1995 .

Solar cycle variations of the thermospheric meridional wind over Japan derived from measurements of h m F 2

T. Ogawa, W. Oliver, S. Igi, 1999 .

A large‐scale traveling ionospheric disturbance during the magnetic storm of 15 September 1999

Akinori Saito, Aaron J. Ridley, Tadahiko Ogawa, 2002 .

Optical and radio measurements of a 630-nm airglow enhancement over Japan on 9 September 1999

S. Kawamura, S. Fukao, K. Shiokawa, 2003 .

Low‐latitude auroras observed in Japan: 1999–2004

K. Shiokawa, Y. Kamide, T. Ogawa, 2005 .

A stable auroral red arc observed over Japan after an interval of very weak solar wind

K. Shiokawa, T. Ogawa, K. Yumoto, 2001 .

Equatorial Ionospheric Scintillations and Zonal Irregularity Drifts Observed with Closely-Spaced GPS Receivers in Indonesia( CPEA-Coupling Processes in the Equatorial Atmosphere)

Tadahiko Ogawa, Kazuo Shiokawa, Yuichi Otsuka, 2006 .

Propagation of large amplitude ionospheric disturbances with velocity dispersion observed by the SuperDARN Hokkaido radar after the 2011 off the Pacific coast of Tohoku Earthquake

Keisuke Hosokawa, Tomoaki Hori, Nozomu Nishitani, 2011 .

Ionospheric disturbances over Japan due to the 18 May 1980 eruption of Mount St. Helens

H. Kumagai, T. Ogawa, K. Sinno, 1982 .

GLOBAL DYNAMIC-RESPONSES OF THE ATMOSPHERE TO THE ERUPTION OF MOUNT ST HELENS ON MAY 18, 1980

R. Leitinger, K. Yeh, L. Kersley, 1982 .

A multi-instrument measurement of a mesospheric front-like structure at the equator

J. Russell, M. Mlynczak, Takuji Nakamura, 2006 .

Relation between Equatorial Ionospheric Scintillations and Atmospheric Waves from Below

T. Ogawa, 小川忠彦, 2011 .

Arctic and Antarctic polar mesosphere summer echoes observed with oblique incidence HF radars: analysis using simultaneous MF and VHF radar data

S. Nozawa, N. Nishitani, T. Ogawa, 2004 .

Simultaneous mesosphere/lower thermosphere and thermospheric F region observations during geomagnetic storms

S. Kawamura, Takuji Nakamura, S. Fukao, 2004 .

NEW MECHANISM OF AURORAL ARCS.

Tetsuya Sato, T. Ogawa, 1971 .

Motion of polar cap patches: A statistical study with all‐sky airglow imager at Resolute Bay, Canada

K. Shiokawa, Y. Otsuka, T. Kashimoto, 2009 .

Antarctic HF radar observations of irregularities associated with polar patches and auroral blobs: A case study

N. Nishitani, T. Ogawa, A. Yukimatu, 1998 .

Relationship between polar cap patches and field‐aligned irregularities as observed with an all‐sky airglow imager at Resolute Bay and the PolarDARN radar at Rankin Inlet

K. Shiokawa, Y. Otsuka, G. Sofko, 2009 .

History of Japanese SuperDARN: Initiation of SENSU Syowa radars and progress of Japanese radar project

T. Nagatsuma, N. Nishitani, T. Ogawa, 2021 .

Auroral radar observations at Siple Station, Antarctica

P. E. Johnston, D. A. Carter, W. Ecklund, 1982 .

Aspect angle dependence of irregularity phase velocities in the auroral electrojet

P. E. Johnston, D. A. Carter, W. Ecklund, 1980 .

Propagation characteristics of nighttime mesospheric and thermospheric waves observed by optical mesosphere thermosphere imagers at middle and low latitudes

K. Shiokawa, Y. Otsuka, T. Ogawa, 2009 .

Mesosphere summer echoes observed with VHF and MF radars at Wakkanai, Japan (45.4°N)

S. Kawamura, Y. Murayama, T. Ogawa, 2011 .

Finland HF and Esrange MST radar observations of polar mesosphere summer echoes

M. Lester, N. Nishitani, T. Ogawa, 2003 .

Velocities of auroral coherent echoes at 12 and 144 MHz

M. Lester, S. Nozawa, S. Milan, 2002 .

Rocket observations of electron density irregularities in the Antarctic auroral E region

T. Ogawa, S. Miyazaki, H. Mori, 1976 .

On the power‐velocity relationship for 12‐ and 50‐MHz auroral coherent echoes

A. Koustov, T. Ogawa, K. Igarashi, 2001 .

Traveling ionospheric disturbances observed in the OI 630‐nm nightglow images over Japan by using a Multipoint Imager Network during the FRONT Campaign

Takeshi Sakanoi, Tadahiko Ogawa, Shoichiro Fukao, 2000 .

Self‐consistent studies of two‐dimensional large‐scale (∼100 m) electrojet irregularities

Tetsuya Sato, T. Ogawa, 1976 .

SC- and SI-associated ULF and HF-Doppler oscillations during the great magnetic storm of February 1986

Kazue Takahashi, T. Ogawa, K. Yumoto, 1989 .

Naturally enhanced ion-acoustic lines seen with the EISCAT Svalbard Radar

S. Watanabe, T. Ogawa, S. Buchert, 1999 .

Large‐scale traveling ionospheric disturbance observed by superDARN Hokkaido HF radar and GPS networks on 15 December 2006

Keisuke Hosokawa, Takuya Tsugawa, Akinori Saito, 2010 .

First imaging and identification of a noctilucent cloud from multiple sites in Hokkaido (43.2–44.4°N), Japan

Hidehiko Suzuki, Y. Murayama, N. Nishitani, 2016, Earth, Planets and Space.

Radar observations of ionospheric irregularities at Syowa Station, Antarctica: a brief overview

Tadahiko Ogawa, T. Ogawa, 1996 .

Mid‐latitude E region field‐aligned irregularities observed with the MU radar

Mamoru Yamamoto, Susumu Kato, Toshitaka Tsuda, 1991 .

Long-Term Characteristics of Midlatitude Mesosphere Summer Echoes (MSE) Observed with a VHF Radar at Wakkanai, Japan (45.4ºN)

S. Kawamura, Hidehiko Suzuki, Y. Murayama, 2021 .

First imaging and identification of a noctilucent cloud from multiple sites in Hokkaido (43.2-44.4 degrees N), Japan

Hidehiko Suzuki, Y. Murayama, N. Nishitani, 2018 .

Statistics of Antarctic mesospheric echoes observed with the SuperDARN Syowa Radar

T. Iyemori, N. Sato, T. Ogawa, 2004 .

Comparison of flow angle variations of E-region echo characteristics at VHF and HF

N. Nishitani, T. Ogawa, K. Igarashi, 2002 .

E region echoes observed with the Syowa HF radar under disturbed geomagnetic conditions

N. Nishitani, T. Ogawa, A. Yukimatu, 2002 .

Multifrequency measurements of HF Doppler velocity in the auroral E region

Tadahiko Ogawa, A. V. Koustov, R. A. Makarevitch, 2002 .

Statistical analysis of echo power, Doppler velocity and spectral width obtained with the Syowa South HF radar

M. Fukumoto, N. Nishitani, T. Ogawa, 1999 .

Statistical study of medium-scale traveling ionospheric disturbances observed with the GPS networks in Southern California

N. Kotake, Takuya Tsugawa, Akinori Saito, 2007 .

Quasiperiodic southward moving waves in 630-nm airglow images in the equatorial thermosphere

Tadahiko Ogawa, Kazuo Shiokawa, Yuichi Otsuka, 2006 .

VHF radar observations of nighttime F-region field-aligned irregularities over Kototabang, Indonesia

Tadahiko Ogawa, Yuichi Otsuka, Y. Otsuka, 2009 .

Traveling ionospheric disturbances detected in the FRONT Campaign

Takeshi Sakanoi, Mamoru Yamamoto, Takuya Tsugawa, 2001 .

Simultaneous observations of nighttime medium-scale traveling ionospheric disturbances and E region field-aligned irregularities at midlatitude

S. Fukao, K. Shiokawa, Y. Otsuka, 2007 .

Statistical study of nighttime medium‐scale traveling ionospheric disturbances using midlatitude airglow images

Tadahiko Ogawa, Kazuo Shiokawa, Yuichi Otsuka, 2003 .

Estimating drift velocity of polar cap patches with all‐sky airglow imager at Resolute Bay, Canada

Y. Otsuka, T. Ogawa, J. Kelly, 2006 .

Application of Back-Propagation Neural Computing for the Short-Term Prediction of Solar Flares

Takehiko Aso, Tadahiko Ogawa, Minoru Abe, 1994 .

Nonlinear stabilization and nonrandom behavior of macroinstabilities in plasmas. II. Numerical verification

Tetsuya Sato, T. Ogawa, 1974 .

Sawtooth, Solitary, and Turbulent Waves in a Weakly Ionized Plasma

Tetsuya Sato, T. Ogawa, Y. Matsuda, 1972 .

Time evolution of high-altitude plasma bubbles imaged at geomagnetic conjugate points

Tadahiko Ogawa, Kazuo Shiokawa, P. Wilkinson, 2004 .

Geomagnetic conjugate observations of equatorial airglow depletions

Tadahiko Ogawa, Kazuo Shiokawa, P. Wilkinson, 2002 .

Imaging observations of midlatitude ionospheric disturbances during the geomagnetic storm of February 12, 2000

K. Shiokawa, Y. Otsuka, Y. Sahai, 2001 .

Azimuth‐dependent Es layer instability: A missing link found

T. Ogawa, R. Tsunoda, R. Cosgrove, 2004 .

Three-channel imaging fabry-perot interferometer for measurement of mid-latitude airglow.

K. Shiokawa, Y. Otsuka, M. Satoh, 2001, Applied optics.

First three‐dimensional simulation of the Perkins instability in the nighttime midlatitude ionosphere

T. Yokoyama, M. Yamamoto, Y. Otsuka, 2008 .

Medium-scale traveling ionospheric disturbances observed with the SuperDARN Hokkaido radar, all-sky imager, and GPS network and their relation to concurrent sporadic E irregularities

Keisuke Hosokawa, Takuya Tsugawa, Nozomu Nishitani, 2009 .

Off‐great‐circle paths in transequatorial propagation: 2. Nonmagnetic‐field‐aligned reflections

T. Yokoyama, T. Maruyama, T. Ogawa, 2016 .

Off‐great‐circle paths in transequatorial propagation: 1. Discrete and diffuse types

T. Yokoyama, T. Maruyama, T. Ogawa, 2016 .

A Statistical Study of Ionospheric Irregularities Observed With a GPS Network in Japan

Y. Otsuka, T. Ogawa, A. Saito, 2013 .

Characteristics and implications of Doppler spectra of E region quasi-periodic echoes observed by the multibeam middle and upper atmosphere radar

M. Yamamoto, Y. Otsuka, T. Ogawa, 2006 .

The first coordinated observations of mid-latitude E-region quasi-periodic radar echoes and lower thermospheric 557.7-nm airglow

M. Yamamoto, K. Shiokawa, Y. Otsuka, 2005 .

Statistical study of relationship between medium-scale traveling ionospheric disturbance and sporadic E layer activities in summer night over Japan

Y. Otsuka, T. Ogawa, A. Saito, 2008 .

Statistical Study of Medium-Scale Traveling Ionospheric Disturbances Observed with a GPS Receiver Network in Japan

N. Kotake, Takuya Tsugawa, Akinori Saito, 2011 .

Imaging observations of the equatorward limit of midlatitude traveling ionospheric disturbances

Tadahiko Ogawa, Kazuo Shiokawa, A. Saito, 2002 .

Deep depletions of total electron content associated with severe mid‐latitude gigahertz scintillations during geomagnetic storms

H. Kumagai, T. Ogawa, 1985 .

Northeastward motion of nighttime medium‐scale traveling ionospheric disturbances at middle latitudes observed by an airglow imager

V. Bychkov, B. Shevtsov, T. Maruyama, 2008 .

Observation of equatorial nighttime medium‐scale traveling ionospheric disturbances in 630‐nm airglow images over 7 years

Kazuo Shiokawa, Yuichi Otsuka, K. Shiokawa, 2012 .

NNSS Satellite Observations of Medium-Scale Traveling Ionospheric Disturbances at Southern High-Latitudes

T. Ogawa, K. Igarashi, H. Maeno, 1987 .

Coordinated observations of nighttime medium‐scale traveling ionospheric disturbances in 630‐nm airglow and HF radar echoes at midlatitudes

B. M. Shevtsov, Keisuke Hosokawa, Nozomu Nishitani, 2009 .

Medium-Scale Traveling Ionospheric Disturbances and Plasma Bubbles Observed by an All-Sky Airglow Imager at Yonaguni, Japan

K. Shiokawa, Y. Otsuka, T. Ogawa, 2009 .

Statistical characteristics of gravity waves observed by an all-sky imager at Darwin, Australia : Darwin Area Wave Experiment (DAWEX)

K. Shiokawa, Y. Otsuka, T. Ogawa, 2004 .

Winter Anomaly and Traveling Ionospheric Disturbances over Japan during DYANA Campaign

M. Kunitake, T. Ogawa, S. Nagai, 1992 .

1.7 GHz scintillation measurements at midlatitude using a geostationary satellite beacon

M. Fujita, T. Ogawa, K. Koike, 1978 .

Behavior of mid-latitude F-region irregularities deduced from spaced-receiver VHF scintillation measurements

H. Kumagai, T. Ogawa, 1986 .

Spatial structure of the E region field-aligned irregularities revealed by the MU radar

M. Yamamoto, T. Tsuda, S. Fukao, 1994 .

Observations and modeling of 630 nm airglow and total electron content associated with traveling ionospheric disturbances over Shigaraki, Japan

Tadahiko Ogawa, Kazuo Shiokawa, A. Saito, 2002 .

On the factors controlling occurrence of F-region coherent echoes

M. Lester, S. Nozawa, D. André, 2002 .

Statistical study of Doppler velocity and echo power around 75 deg magnetic latitude using data obtained with the Syowa East HF radar in 1997

M. Fukumoto, N. Nishitani, T. Ogawa, 2000 .

Characteristics of equatorial gravity waves derived from mesospheric airglow imaging observations

Tadahiko Ogawa, Kazuo Shiokawa, Yuichi Otsuka, 2009 .

Preliminary results from joint measurements of E-region field-aligned irregularities using the MU radar and the frequency-agile radar

M. Yamamoto, S. Fukao, T. Ogawa, 1997 .

A review of radar and satellite beacon observations of atmospheric gravity waves at Syowa Station

T. Ogawa, 忠彦小川, 1998 .

A localized structure in OH airglow images near the mesopause region

Takuji Nakamura, K. Shiokawa, T. Ogawa, 2003 .

Height comparison of midlatitude E region field‐aligned irregularities and sporadic E Layer

M. Yamamoto, T. Ogawa, K. Nozaki, 1998 .

Frequency dependence of ionospheric scintillations and its application to spectral estimation of electron density irregularities

Tadahiko Ogawa, M. Fujita, M. Fujita, 1982 .

A role of neutral motions in formation of midlatitude E‐region field‐aligned irregularities

M. Yamamoto, S. Fukao, T. Ogawa, 2000 .

Spatial distribution of mid‐latitude sporadic E scintillations in summer daytime

M. Kunitake, T. Ogawa, A. Suzuki, 1989 .

Geomagnetic conjugate observations of large-scale traveling ionospheric disturbances using GPS networks in Japan and Australia

K. Shiokawa, Y. Otsuka, T. Ogawa, 2006 .

Height measurements of nightglow structures observed by all-sky imagers

Tadahiko Ogawa, Kazuo Shiokawa, K. Shiokawa, 1999 .

Seasonal variation of gravity waves with various temporal and horizontal scales in the MLT region observed with radar and airglow imaging

Toshitaka Tsuda, Masaki Tsutsumi, Tadahiko Ogawa, 2001 .

Rankin Inlet PolarDARN radar observations of duskward moving Sun-aligned optical forms

K. Shiokawa, N. Nishitani, A. Koustov, 2008 .

Correction to: Review of the accomplishments of mid-latitude Super Dual Auroral Radar Network (SuperDARN) HF radars

M. Lester, R. Greenwald, E. Thomas, 2019, Progress in Earth and Planetary Science.

Upper mesosphere summer echoes detected with the Antarctic Syowa HF radar

N. Nishitani, T. Ogawa, A. Yukimatu, 2002 .

Correlation of nighttime MF signal strength with solar activity.

I. Kimura, T. Ogawa, N. Wakai, 1990 .

Title Q FACTORS OF THE SCHUMANN RESONANCES AND SOLAR ACTIVITY

T. Ogawa, Toshio Tanaka, Author Ogawa, 2016 .

Neutral wind observations by 50 MHz meteor radar at Syowa Station

A. Nomura, T. Ogawa, Takashi Tanaka, 1988 .

Satellite observation of medium-scale traveling ionospheric disturbances over Syowa Station

T. Ogawa, K. Igarashi, H. Maeno, 1988 .

Some initial results of 50 MHz meteor radar observation at Syowa Station

T. Ogawa, K. Igarashi, R. Fujii, 1985 .

Preliminary results of new 50 MHz doppler radar experiment at Syowa Station

T. Ogawa, K. Igarashi, R. Fujii, 1983 .

Dual‐site imaging observations of small‐scale wave structures through OH and OI nightglow emissions

Toshitaka Tsuda, Tadahiko Ogawa, Kazuo Shiokawa, 2002 .

Mesosphere summer echoes observed with the SuperDARN Hokkaido HF radar at Rikubetsu, Japan (43.5°N)

S. Kawamura, Y. Murayama, N. Nishitani, 2013, Earth, Planets and Space.

HF radar experiment at Syowa Station for the study of high-latitude ionosphere-2: A capability (extended abstract)

T. Ogawa, K. Igarashi, N. Sato, 1990 .

Lower ionosphere at middle latitudes: its morphology and response to meteorological and solar-terrestrial activity during the DYANA campaign 1990

E. A. Benediktov, B. Morena, J. Laštovička, 1994 .

Characteristics of O(+) density depressions in the topside nighttime ionosphere revealed by ISS-b satellite

T. Ogawa, S. Miyazaki, E. Sagawa, 1983 .

Interhemispheric asymmetry of the high-latitude ionospheric convection on 11-12 May 1999

N. Nishitani, T. Ogawa, F. Rich, 2003 .

Sea surface echoes observed with the MU radar under intense sporadic E conditions

M. Yamamoto, S. Fukao, T. Ogawa, 1996 .

Reorganization of polar cap patches through shears in the background plasma convection

K. Shiokawa, Y. Otsuka, G. Sofko, 2010 .

Distant lunar sodium tail observed in the Japanese local‐time sector during the Leonid meteor shower of 1998

Takuji Nakamura, K. Shiokawa, T. Ogawa, 2000 .

Influence of Magnetoplasma on Gyro-Synchrotron Radiation

T. Ogawa, K. Sakurai, 1969 .

Unusual ionospheric echoes with high velocity and very low spectral width observed by the SuperDARN radars in the polar cap during high geomagnetic activity

Mark Lester, Natsuo Sato, Stephen E. Milan, 2004 .

A new technique for mapping of total electron content using GPS network in Japan

Takuya Tsugawa, Tadahiko Ogawa, Shoichiro Fukao, 2002 .