Publication List of SuperDARN Hokkaido Pair of (HOP) radars

Papers (refereed)

Hazeyama, W., N. Nishitani, T. Hori, T. Nakamura, and S. Perwitasari, Statistical
study of seasonal and solar activity dependence of nighttime MSTIDs occurrence using
the SuperDARN Hokkaido pair of radars, J. Geophys. Res.: Space Phys., 127,
e2021JA029965, https://doi.org/10.1029/2021JA029965, 2022.
(published: 22 March, 2022)

Nishitani, N., Y. Hamaguchi, and T. Hori, Development of remote HF wave receiver
in the backlobe direction of the SuperDARN Hokkaido East radar: Initial observations,
Polar Sci., https://doi.org/10.1016/j.polar.2021.100669, 2021.
(corrected proof published: 21 Apr, 2021)

Nakano, S., T. Hori, K. Seki, and N. Nishitani, A framework for estimating spherical
vector fields using localized basis functions and its application to SuperDARN data
processing, Earth Planets Space, 72:46, https://doi.org/10.1186/s40623-020-01168-4,
2020.
(published: 7 Apr, 2020)

Astafyeva, E., M.S. Bagiya, M. Förster, and N. Nishitani, Unprecedented Hemispheric
Asymmetries During a Surprise Ionospheric Storm: A Game of Drivers, J. Geophys. Res.:
Space Physics, 125, 3, https://doi.org/10.1029/2019JA027261, 2020.
(published: 3 Jan, 2020)

Zhang, J. J., Wang, W., Wang, C., Lan, A. L., Yan, J. Y., Xiang, D., Zhang, Q.H.,
Ruohoniemi, J.M. , Kunduri, B.S.R, Nishitani, N., Shi, X., and Qiu, H.B., First
observation of ionospheric convection from the Jiamusi HF radar during a strong
geomagnetic storm. Earth and Space Science, 7, e2019EA000911,
https://doi.org/10.1029/2019EA000911, 2020.
(published: 11 Dec, 2019)

Berngardt, O.I., J.M. Ruohoniemi, J.-P. St-Maurice, A. Marchaudon, M.J. Kosch, A.S.
Yukimatu, N. Nishitani, S.G. Shepherd, M.F. Marcucci, H. Hu, T. Nagatsuma, and M. Lester,
Global diagnostics of ionospheric absorption during X-ray solar flares based on 8- to
20-MHz noise measured by over-the-horizon radars, Space Weather, 17, 907–924,
https://doi.org/10.1029/2018SW002130, 2019.
(published: 24 Jun, 2019)

Obana, Y., N. Maruyama, A. Shinbori, K.K. Hashimoto, M. Fedrizzi, M. Nosé, Y. Otsuka,
N. Nishitani, T. Hori, A. Kumamoto, F. Tsuchiya, S. Matsuda, A. Matsuoka,
Y. Kasahara, A. Yoshikawa, Y. Miyoshi, and I. Shinohara, Response of the Ionosphere-
Plasmasphere Coupling to the September 2017 Storm: What Erodes the Plasmasphere so
Severely?, Space Weather, https://doi.org/10.1029/2019SW002168, 2019.
(published: 18 May, 2019)

Nishitani, N., J.M. Ruohoniemi, M. Lester, J.B.H. Baker, A.V. Koustov, S.G. Shepherd,
G. Chisham, T. Hori, E.G. Thomas, R.A. Makarevich, A. Marchaudon, P. Ponomarenko,
J.A. Wild,  S.E. Milan, W.A. Bristow, J. Devlin, E. Miller, R.A. Greenwald, T. Ogawa,
and T. Kikuchi, Review of the accomplishments of Mid-latitude Super Dual Auroral Radar
Network (SuperDARN) HF Radars, Progress in Earth and Planetary Science,
https://doi.org/10.1186/s40645-019-0270-5, 6:27, 2019.
(published: 18 Mar, 2019)

Shinbori, A.,  Y. Otsuka, T. Tsugawa, M. Nishioka, A. Kumamoto, F. Tsuchia, S. Matsuda,
Y. Kasahara, A. Matsuoka, J. M. Ruohoniemi, S. G. Shepherd, and N. Nishitani, Temporal
and spatial variations of storm-time mid-latitude ionospheric trough based on global
GNSS-TEC and Arase satellite observations, Geophys. Res. Lett., 45, 15, 7362-7370,
https://doi.org/10.1029/2018GL078723, 2018.
(published: 25 Jul, 2018)

Chakraborty, S., Ruohoniemi, J. M., Baker, J. B. H., & Nishitani, N., Characterization
of short-wave fadeout seen in daytime SuperDARN ground scatter observations,
Radio Science, 53, 472–484, https://doi.org/10.1002/2017RS006488, 2018.
(published: 18 APR, 2018)

Berngardt,, O.I., J.M. Ruohoniemi, N. Nishitani, S.G. Shepherd, W.A. Bristow, E.S. Miller,
Attenuation of decameter wavelength sky noise during x-ray solar flares in 2013–2017
based on the observations of midlatitude HF radars, J. Atmos. Sol. Terr. Phys., 173,
1-13, https://doi.org/10.1016/j.jastp.2018.03.022, 2018.
(published: 7 APR, 2018)

Takahashi, N., Y. Kasaba, Y. Nishimura, A. Shinbori, T. Kikuchi, T. Hori, Y. Ebihara
and N. Nishitani, Propagation and evolution of electric fields associated with solar
wind pressure pulses based on spacecraft and ground-based observations, J.
Geophysical Res., DOI: 10.1002/2017JA023990, 2017.
(published: 23 AUG, 2017)

Kawano, H., A. S. Yukimatu, Y. Tanaka, S. Saita, N. Nishitani, and T. Hori,
SC-triggered 1.6mHz waves including an interval with latitude-dependent phase
shift, observed by the SuperDARN Hokkaido East Radar in mid latitudes: Possible
global magnetospheric cavity-mode waves and their field-line resonance with poloidal
Alfven-mode waves, Memoirs of the Faculty of Science, Kyushu University, Series D,
Earth and Planetary Sciences, Vol. 34 (No. 1), pp. 1-15, Nov. 21, 2016.
(published: 23 November, 2016)

Oinats, A.V., N. Nishitani, P. Ponomarenko, and K. Ratovsky, Diurnal and seasonal
behavior of the Hokkaido East SuperDARN ground backscatter: simulation and
observation, Earth, Planets and Space. 68:18, DOI: 10.1186/s40623-015-0378-9, 2016.
(published: 09 February, 2016)

Oinats, A.V., N. Nishitani, P. Ponomarenko, O. Berngardt, and K. Ratovsky, Statistical
characteristics of medium-scale traveling ionospheric disturbances revealed from the
Hokkaido East and Ekaterinburg HF radar data, Earth, Planets and Space. 68:8,
DOI: 10.1186/s40623-016-0390-8, 2016.
(published: 21 January, 2016)

Yakymenko, K.N, A. V. Koustov, and N. Nishitani, Statistical study of midlatitude E
region echoes observed by the Hokkaido SuperDARN HF radar, J. Geophys. Res., 120,
9959-9976, doi:10.1002/2015JA021685, 2015.
(published: 14 November, 2015)

Teramoto, M. N. Nishitani, Y. Nishimura, and T. Nagatsuma, Latitudinal dependence on
frequency of Pi2 pulsations near the plasmapause, using THEMIS satellites and
Asian-Oceanian SuperDARN radars, Earth Planets Space, 68:22, doi:
10.1186/s40623-016-0397-1, 2016.
(published: 17 February, 2016)

Hori T., A. Shinbori, S. Fujita, and N. Nishitani, IMF-By dependence of transient
ionospheric flow perturbation associated with sudden impulses: SuperDARN observations,
Earth, Planets Space, 67:190, doi: 10.1186/s40623-015-0360-62015, 2015.
(published: 25 November, 2015)

Ponomarenko, P., N. Nishitani, A.V. Oinats, T. Tsuya and J.-P. St.-Maurice, Application
of ground scatter returns for calibration of HF interferometry data, Earth Planets
Space, 67:138, doi: 10.1186/s40623-015-0310-3, 2015.
(published: August 26, 2015)

Nagano, H., N. Nishitani, and T. Hori, Occurrence characteristics and lowest speed
limit of Sub-Auroral Polarization Stream (SAPS) observed by the SuperDARN Hokkaido
East radar, Earth Planets Space, 67:126, doi: 10.1186/s40623-015-0299-7, 2015.
(published: August 13, 2015)

Oinats, A.V., V.I. Kurkin, and N. Nishitani, Statistical study of medium-scale traveling
ionospheric disturbances using SuperDARN Hokkaido ground backscatter data for 2011,
Earth Planets Space, 67, 22, doi: 10.1186/s40623-015-0192-4, 2015.
(published: Feb 15, 2015)

Teramoto, M., N. Nishitani, V. Pilipenko, T. Ogawa, K. Shiokawa, T. Nagatsuma,
A. Yoshikawa, D. Baishev, and K. T. Murata, Pi2 pulsation simultaneously observed
in the E and F region ionosphere with the SuperDARN Hokkaido radar, J. Geophys. Res,
119, 3444-3462, doi:10.1002/2012JA018585, 2014.
(published: May 14, 2014)

Koustov, A.V., K. N. Yakymenko, N. Nishitani, and P. V. Ponomarenko, Hokkaido HF
radar signatures of periodically reoccurring nighttime MSTIDs detected at short
ranges, J. Geophys. Res., 119, 10.1002/2013JA019422, 1200-1218, 2014.
(published: Feb. 10, 2014)

Zou, Y., and N. Nishitani, Study of mid-latitude ionospheric convection during quiet
and disturbed periods using the SuperDARN Hokkaido radar, Adv. Space Res.,
54, 473-480, http://dx.doi.org/10.1016/j.asr.2014.01.011, 2014.
(pubished: Jan. 31, 2014)

Ogawa, T., N. Nishitani, S. Kawamura, and Y. Murayama, Mesosphere summer echoes
observed with the SuperDARN Hokkaido HF radar at Rikubetsu, Japan (43.5N),
Earth Planets Space, 65, 1593-1597, 2013.
(published: Dec 6, 2013)

Watanabe, D., and N. Nishitani, Study of ionospheric disturbances during solar flare
events with the SuperDARN Hokkaido Radar, Adv. Polar Sci., 24, 12-18, 2013.
(published: Mar 2013)

Hori, T., N. Nishitani, Y. Miyoshi, Y. Miyashita, K. Seki, T. Segawa, K. Hosokawa,
A. S. Yukimatu, Y. Tanaka, N. Sato, M. Kunitake, and T.  Nagatsuma, An integrated
analysis platform merging the SuperDARN data within the THEMIS tool developed by
ERG-Science Center (ERG-SC), Adv. Polar Sci., 24,  doi:
10.3724/SP.J.1085.2013.000692013, 69-77, 2013.
(published: Mar 2013)

Ichihara, A., N. Nishitani, T. Ogawa, and T. Tsugawa, Northward-propagating nighttime
medium-scale traveling ionospheric disturbances observed with the SuperDARN Hokkaido
HF radar and GEONET, Adv. Polar Sci., 24, 42-49, 2013.
(published: Mar 2013)

Kim, K.-H., D.-H. Lee, K. Shiokawa, E. Lee, J.-S. Park, H.-J. Kwon, V. Angelopoulos,
Y.-D. Park, J. Hwang, N. Nishitani, T. Hori, K. Koga, T. Obara, K. Yumoto, and
D. Baishev, Magnetospheric responses to the passage of the interplanetary shock on 24
November 2008, J. Geophys. Res., 117, A10209, doi:10.1029/2012JA017871, 2012.
(published: October 6, 2012)

Ogawa, T., N. Nishitani, T. Tsugawa, and K. Shiokawa, Giant ionospheric
disturbances observed with the SuperDARN Hokkaido HF radar and GPS network after
the 2011 Tohoku earthquake, Earth Planets Space, 64, 12, 1295-1307, 2012.
(published: Jan 28, 2013)

Nishitani, N., T. Ogawa, Y. Otsuka, K. Hosokawa, and T. Hori, 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, Earth Planets Space, 63, 891-896, 2011.
(published: Sep 27, 2011)

Hosokawa, K., T. Tsugawa, K. Shiokawa, Y. Otsuka, N. Nishitani, T. Ogawa,
M. Hairston, and L. J. Paxton, Dynamic temporal evolution of polar cap tongue
of ionization during magnetic storm, J. Geophys. Res., 115, A12333,
doi:10.1029/2010JA015848, 2010.
(published: Dec 24, 2010)

Hosokawa, K., and N. Nishitani, Plasma irregularities in the duskside subauroral
ionosphere as observed with midlatitude SuperDARN radar in Hokkaido, Japan,
Radio Sci., 45, RS4003, doi:10.1029/2009RS004244, 2010.
(published: Jul 7, 2010)

Hayashi, H., N. Nishitani, T. Ogawa, Y. Otsuka, T. Tsugawa, K. Hosokawa, and A. Saito,
Large-Scale traveling ionospheric disturbance observed by SuperDARN Hokkaido HF radar
and GPS networks on 15 December 2006, J. Geophys. Res., 115, A06309,
doi:10.1029/2009JA014297, 2010.
(published: Jun 16, 2010)

Kikuchi, T., Y. Ebihara, K.K. Hashimoto, R. Kataoka, T. Hori, S. Watari, and N.
Nishitani, Penetration of the convection and overshielding electric fields to the
equatorial ionosphere during a quasi-periodic DP2 geomagnetic fluctuation event,
J. Geophys. Res., 115, A05209, doi:10.1029/2008JA013948, 2010.
(published: May 15, 2010)

Koustov, A.V., N. Nishitani, K. Shiokawa, S. Suzuki, and B.M. Shevtsov,
Joint observations of a traveling ionospheric disturbance with the
Paratunka OMTI camera and the Hokkaido HF radar, Ann. Geophys., 27,
2399-2406, 2009.
(published: Jun 9, 2009)

Suzuki S., K. Hosokawa, Y. Otsuka, K. Shiokawa, T. Ogawa, N. Nishitani,
T. F. Shibata, A. V. Koustov, and B. M. Shevtsov, Coordinated observations
of nighttime medium-scale traveling ionospheric disturbances in 630-nm airglow
and HF radar echoes at midlatitudes, J. Geophys. Res., 114, A07312,
doi:10.1029/2008JA013963, 2009.
(published: Jul 25, 2009)

Kataoka, R., K. Hosokawa, N. Nishitani, and Y. Miyoshi, SuperDARN
Hokkaido radar observation of westward flow enhancement in
subauroral latitudes, Ann. Geophys., 27, 1695-1699, 2009.
(published: Apr 7, 2009)

Ogawa, T., N. Nishitani, Y. Otsuka, K. Shiokawa, T. Tsugawa,
and K. Hosokawa, 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,
J. Geophys. Res., 114, A03316, doi:10.1029/2008JA013893, 2009.
(published: Mar 31, 2009)

Ebihara, Y., N. Nishitani, T. Kikuchi, T. Ogawa, K. Hosokawa, M. -C. Fok and
M. F. Thomsen, Dynamical property of storm-time subauroral rapid flows as a
manifestation of complex structures of the plasma pressure in the inner
magnetosphere, J. Geophys. Res., 114, A01306, doi:10.1029/2008JA013614, 2009.
(published: Jan 27, 2009)

Shiokawa, K., Y. Otsuka, N. Nishitani, T. Ogawa, T. Tsugawa, T. Maruyama,
S. E. Smirnov, V. V. Bychkov, and B. M. Shevtsov, Northeastward motion
of nighttime MSTIDs at middle latitudes observed by an airglow imager,
J. Geophys. Res., 113, A12312, doi:10.1029/2008JA013417, 2008.
(published: Dec 30, 2008)

Koustov, A.V., N. Nishitani, Y. Ebihara, T. Kikuchi, M.R. Hairston, and D. Andre,
Subauroral polarization streams: observations with the Hokkaido and King Salmon
SuperDARN radars and modeling, Ann. Geophys., 26, 3317-3327, 2008.
(published: Oct 21, 2008)

Ishida, T., K. Hosokawa, T. Shibata, S. Suzuki, N. Nishitani, and T. Ogawa,
SuperDARN observations of daytime MSTIDs in the auroral and mid-latitudes:
Possibility of long-distance propagation, Geophys. Res. Lett., 35, L13102,
doi:10.1029/2008GL034623, 2008.
(published: July 4, 2008)

Ebihara, Y., N. Nishitani, T. Kikuchi, T. Ogawa, K. Hosokawa, and M.-C. Fok,
Two-dimensional observations of overshielding during a magnetic storm by the
Super Dual Auroral Radar Network (SuperDARN) Hokkaido radar, J. Geophys. Res.,
113, A01213, doi:10.1029/2007JA012641, 2008.
(published: Jan 25, 2008)

Kataoka, R., N. Nishitani, Y. Ebihara, K. Hosokawa, T. Ogawa, T. Kikuchi, and
Y. Miyoshi, Dynamic variations of a convection flow reversal in the subauroral
postmidnight sector as seen by the SuperDARN Hokkaido HF radar, Geophys. Res. Lett.,
34, L21105, doi:10.1029/2007GL031552, 2007.
(published: Nov 14, 2007)

Nishitani, N., and T. Ogawa, Model calculations of possible ionospheric backscatter echo
area for a mid-latitude HF radar, Adv. Polar Upper Atmos. Res., 19, 55-62, 2005.


Presentations at International conferences

2015

Nishitani, N., T. Hori, and SuperDARN HOP radars group, SuperDARN HOkkaido Pair of
(HOP) radars: accomplishments, present status and future perspectives, United
Nations / Japan Workshop on Space Weather: Science and Data Products from ISWI
Instruments, Fukuoka, Japan, 2015.3.2-6.

Nishitani, N., T. Hori, and SuperDARN HOP radars group, Dynamics of the ionosphere
observed by the SuperDARN HOkkaido Pair of (HOP) HF radars during the 4 November
storm event, The 3rd AOSWA Workshop, Fukuoka, Japan, 2015.3.2-5.

Nishitani, N., SuperDARN HOkkaido Pair of (HOP) radars: present status and scientific
objectives (invited), The Korean Space Science Society Meeting (international session),
Gangwon-do, Korea, 2015.4.28-29.

Nishitani, N., T. Hori, and SuperDARN HOP radars group, Initial observation with
the SuperDARN Hokkaido Pair of (HOP) radars, SuperDARN Workshop 2015, Leicester,
United Kingdom, 2015.6.1-5.

Nishitani, N., R. Kigawa, T. Hori, Y. Hamaguchi, and SuperDARN HOP radars group,
Study of ionospheric disturbances using the remote HF wave receiver of the SuperDARN
Hokkaido East radar: initial results, SuperDARN Workshop 2015, Leicester, United
Kingdom, 2015.6.1-5.

Nishitani, N., T. Hori, R. Kataoka, Y. Ebihara, and K. Shiokawa, Characteristics of
ionospheric convection associated with low-latitude aurora observed at Rikubetsu,
Hokkaido during the 2015 March storm, SuperDARN Workshop 2015, Leicester, United
Kingdom, 2015.6.1-5.

Hori, T., Y. Miyoshi, K. Seki, Y. Miyashita, K. Keika, M. Shoji, T. Segawa,
I. Shinohara, Y. Tanaka, K. Shiokawa, K. Asamura, T. Takashima, N. Nishitani,
A.S. Yukimatu, and T. Nagatsuma, The ERG project: Current status and related scientific
activities, SuperDARN Workshop 2015, Leicester, United Kingdom, 2015.6.1-5.

Hori, T., A. Shinbori, S. Fujita, and N. Nishitani, IMF-By dependence of transient
ionospheric flow perturbation associated with sudden impulses: SuperDARN observations,
SuperDARN Workshop 2015, Leicester, United Kingdom, 2015.6.1-5.

Kawano, H., A.S. Yukimatu, Y. Tanaka, S. Saita, N. Nishitani, and T. Hori, SuperDARN
Hokkaido East radar observation of a possible SC-triggered wave event including FLR
signatures, SuperDARN Workshop 2015, Leicester, United Kingdom, 2015.6.1-5.

Ponomarenko, P., N. Nishitani, A. Oinats, T. Tsuya, and J.-P. St. Maurice, Calibration
of historic interferometry data, SuperDARN Workshop 2015, Leicester, United Kingdom,
2015.6.1-5.

Ratovsky K.G., A.V. Oinats, and N. Nishitani, Comparison of Polar, Sub-polar and
Mid-latitude Ionospheric Variability Using Ionosonde and SuperDARN Data, PIERS 2015,
Prague, Czech Republic, 2015.07.6-9.

2014

Nishitani, N., T. Hori, H. Nagano, and SuperDARN Hokkaido radar group, Characteristics
of dayside SAPS structures observed by the SuperDARN Hokkaido radar, SuperDARN Workshop
2014, Longyearbyen, Norway, 2014.5.26-30.

Nagano, H., N. Nishitani, and T. Hori, Occurrence characteristics of subauroral
rapid plasma flows observed by the SuperDARN Hokkaido HF radar, SuperDARN Workshop
2014, Longyearbyen, Norway, 2014.5.26-30.

Tsuya, T., N. Nishitani, T. Ogawa, M. Tsutsumi, and A.S. Yukimatu, Occurrence
characteristics of Mesosphere Summer Echoes observed by the SuperDARN Hokkaido HF
radar, SuperDARN Workshop 2014, Longyearbyen, Norway, 2014.5.26-30.

Oinats, A.V., and N. Nishitani, Statistical study of traveling ionospheric disturbances
using SuperDARN Hokkaido Radar,  SuperDARN Workshop 2014, Longyearbyen, Norway,
2014.5.26-30.

Nishitani, N., Study of Ionosphere-thermosphere Coupling Using the SuperDARN Hokkaido
Radar, AOGS 2014, Sapporo, Japan, 2014.7.28-8.1.

Nishitani, N., T. Hori, H. Nagano, and SuperDARN Hokkaido radar group, Dynamics of
Dayside Sub-Auroral Polarization Streams Observed by the SuperDARN Hokkaido Radar,
AOGS 2014, Sapporo, Japan, 2014.7.28-8.1.

Tsuya, T., N. Nishitani, T. Ogawa, M. Tsutsumi, and A. S. Yukimatu, Identifying
Neutral Wind Distribution from Meteor Echoes Observed by the SuperDARN Hokkaido HF Radar,
AOGS 2014, Sapporo, Japan, 2014.7.28-8.1.

Nagano, H., N. Nishitani, and T. Hori, Classification and Occurrence Characteristics
of Subauroral Rapid Plasma Flows Observed by SuperDARN Hokkaido HF Radar, AOGS 2014,
Sapporo, Japan, 2014.7.28-8.1.

Oinats, A.V., V.I. Kurkin, N. Nishitani, and O.I. Berngardt, Statistical study of
TIDs using HF radar ground backscatter data, AOGS 11th Annual Meeting. Sapporo, Japan,
2012.7.28-8.1.

Oinats, A.V., V.I. Kurkin, N. Nishitani, O.I. Berngardt , V.A. Ivanova, K.G. Ratovsky,
Statistical study of TIDs using HF radar ground backscatter data and chirp sounding
network MUF data,  The 40th COSPAR Scientific Assembly. Moscow, Russia, 2014.8.2-10.

Oinats,  A.V., N. Nishitani, K.G. Ratovsky, Ground backscatter characteristics model
for SUPERDARN Hokkaido HF radar, The 40th COSPAR Scientific Assembly. Moscow, Russia,
2014.8.2-10.

Nishitani, N., T. Hori, H. Nagano, and SuperDARN Hokkaido radar group, Dynamics of
the high and mid latitude ionosphere affected by solar wind / IMF changes and
substorms, Magnetosphere-Ionosphere Convection and Substorm (MICS) meeting, Kyoto,
Japan, 2014.11.8-9.

Nishitani, N., T. Hori, H. Nagano, and SuperDARN Hokkaido radar group, Occurrence
characteristics of dayside SAPS structures observed by the SuperDARN Hokkaido radar,
International Conference on Substorms-12, Ise, Japan, 2014.11.10-14.

Oinats, A.V., V.I. Kurkin, O.I. Berngardt, and N. Nishitani, Study of LSTIDs
parameters determined using SuperDARN ground backscatter data during geomagnetically
disturbed conditions, International Conference on Substorms-12, Ise, Japan,
2014.11.10-14.

Nagano, H., N. Nishitani, and T. Hori, Occurrence characteristics of subauroral rapid
plasma flows and lowest speed threshold of SAPS observed by the SuperDARN Hokkaido
HF radar, International Conference on Substorms-12, Ise, Japan, 2014.11.10-14.

Nagano, H., N. Nishitani, and T. Hori, Occurrence characteristics of subauroral
westward plasma flows and lowest speed threshold of SAPS observed by the SuperDARN
Hokkaido HF radar, 2014 AGU Fall Meeting, San Francisco, USA, 2014.12.15-19.

2013

Nishitani, N., Midlatitude SuperDARN observations of ionospheric dynamics,
STEL-KASI workshop, Nagoya, Japan, 2013.3.18-3.19.

Nishitani, N., T. Hori, M. Teramoto, and SuperDARN Hokkaido radar group,
Latitudinal characteristics of Sub Auroral Polarization Streams during
large geomagnetic storms observed by the SuperDARN Hokkaido radar,
SuperDARN Workshop 2013, Moose Jaw, Canada, 2013.5.27-5.31.

Koustov, A.V., N. Nishitani, P. Ponomarenko, and K. Yakymenko,
Periodically-occurring MSTIDs seen through E-region Hokkaido echoes on
17 August 2010, SuperDARN Workshop 2013, Moose Jaw, Canada, 2013.5.27-5.31.

Matsushita, T., K. Seki, N. Nishitani, T. Kikuchi, Y. Miyoshi, T. Hori, M. Teramoto,
K. Shiokawa, and K. Yumoto, Statistical properties of Pc5 waves in the midlatitude
ionosphere observed by the SuperDARN Hokkaido HF radar, SuperDARN Workshop 2013,
Moose Jaw, Canada, 2013.5.27-5.31.

Kikuchi, T., K.K. Hashimoto,  Y. Nishimura, Y. Ebihara, T. Hori, N. Nishitani,
I. Tomizawa, and T. Nagatsuma, Penetration of the polar electric field to the
equator during geomagnetic pulsations as observed by the Hokkaido radar, HF Doppler
measurements and magnetometer array, SuperDARN Workshop 2013, Moose Jaw, Canada,
2013.5.27-5.31.

Ogawa, T., N. Nishitani, T. Tsugawa, and M. Teramoto, SuperDARN Hokkaido radar
observations of short-period ionospheric disturbances induced by the annular
solar eclipse of 20 May 2012 over Japan, SuperDARN Workshop 2013, Moose Jaw,
Canada, 2013.5.27-5.31.

Watanabe, D., and N. Nishitani, Study of quantitative characteristics of
ionospheric disturbances during solar flare events with the SuperDARN
Hokkaido Radar, SuperDARN Workshop 2013, Moose Jaw, Canada, 2013.5.27-5.31.

N. Nishitani, Japanese contribution to mid-latitude Super Dual Auroral Radar
Network (SuperDARN) (invited), International Living With a Star Workshop (ILWS-2013),
Irkutsk, Russia, 2013.6.24-6.28.

Matsushita, T., K. Seki, N. Nishitani, T. Hori, M. Teramoto, T. Kikuchi,
Y. Miyoshi, K. Shiokawa, K. Yumoto, H. Réme, H. Singer, and V. Angelopoulos,
Statistical properties of mid-latitude Pc5 waves observed by the SuperDARN
Hokkaido HF radar, International CAWSES-II Symposium, Nagoya, Japan, 2013.11.18-11.22.

Nishitani, N., T. Hori, M. Teramoto, and SuperDARN Hokkaido radar group,
Dynamics of Sub Auroral Polarization Streams During Large Geomagnetic
Storms Observed by the SuperDARN Hokkaido radar, International CAWSES-II Symposium,
Nagoya, Japan, 2013.11.18-11.22.

Nishitani, N., and SuperDARN Hokkaido radar group, SuperDARN Hokkaido West Radar,
International CAWSES-II Symposium, Nagoya, Japan, 2013.11.18-11.22.

Oinats, A.V., V.I. Kurkin, and N. Nishitani, A statistical study of large-scale
traveling ionospheric disturbances using SuperDARN Hokkaido radar, International
CAWSES-II Symposium, Nagoya, Japan, 2013.11.18-11.22.

Tsuya, T., N. Nishitani, T. Ogawa, M. Tsutsumi, and A.S. Yukimatu, Study of upper
atmosphere dynamics near mesopause region using the SuperDARN Hokkaido HF radar,
International CAWSES-II Symposium, Nagoya, Japan, 2013.11.18-11.22.

Watanabe, D., and N. Nishitani, Quantitative study of ionospheric disturbance
characteristics during solar flare events using the SuperDARN Hokkaido Radar,
International CAWSES-II Symposium, Nagoya, Japan, 2013.11.18-11.22.

Watanabe, D., N. Nishitani, and. S. Imada, A quantitative study of ionospheric
disturbance characteristics during solar flare events using the SuperDARN Hokkaido
radar and solar radiation data, 2013 Fall AGU Meeting, San Francisco, USA, 2013.12.9-13.

Tsuya, T., N. Nishitani, T. Ogawa, M. Tsutsumi, and A.S. Yukimatu, Occurrence
characteristics of Mesosphere Summer Echoes observed by the SuperDARN Hokkaido
HF radar, 2013 Fall AGU Meeting, San Francisco, USA, 2013.12.9-13.

Nishitani, N., Study of ionospheric disturbances due to solar disturbances by the
high and midlatitude SuperDARN HF radars (invited), 2nd ISSI Workshop on "MHD
Oscillations in the Solar Corona and Earth’s Magnetosphere: Towards Consolidate
Understanding", Bern, Switzerland, 2013.12.9-13.

2012

Ogawa, T., N. Nishitani, T. Tsugawa, and K. Shiokawa, Ionospheric disturbances
observed with the SuperDARN Hokkaido radar and GPS network after the 2011 Tohoku
earthquake in Japan, SuperDARN Workshop 2012, Shanghai, China, 2012.5.28-6.1.

Watanabe, D., and N. Nishitani, Study of ionospheric disturbances during solar flare
events with the SuperDARN Hokkaido Radar, SuperDARN Workshop 2012, Shanghai, China,
2012.5.28-6.1.

Koustov, A.V., N. Nishitani, and T. Otsuka, Observations of zonally-moving MSTIDs with
the Hokkaido SuperDARN radar and TEC GPS receivers, SuperDARN Workshop 2012, Shanghai,
China, 2012.5.28-6.1.

Zou, Y., and N. Nishitani, Study of disturbance dynamo effects on mid-latitude
ionospheric convection with the SuperDARN Hokkaido radar, SuperDARN Workshop 2012,
Shanghai, China, 2012.5.28-6.1.

Oinats, A.V., V.I. Kurkin, K.A. Kutelev, and N. Nishitani, On the determination of
the large-scale traveling ionospheric disturbances using SuperDARN ground backscatter,
SuperDARN Workshop 2012, Shanghai, China, 2012.5.28-6.1.

Nishitani, N., M. Teramoto, and SuperDARN Hokkaido radar group, Dynamics of Sub-Auroral
Polarization Streams observed by the SuperDARN Hokkaido radar during the March 2012
geomagnetic storm, SuperDARN Workshop 2012, Shanghai, China, 2012.5.28-6.1.

Teramoto, M., N. Nishitani, K. Shiokawa, T. Nagatuma, and T. Murata, Spatial
characteristics of mid-latitude Pi2 pulsations observed by the SuperDARN Hokkaido
radar, SuperDARN Workshop 2012, Shanghai, China, 2012.5.28-6.1.

Kikuchi, T.,  K.K. Hashimoto, Y. Nishimura, T. Tanaka, N. Nishitani, and T. Nagatsuma,
Electric field and currents associated with the Region-2 field-aligned currents at
auroral-to-equatorial latitudes during substorms, SuperDARN Workshop 2012, Shanghai,
China, 2012.5.28-6.1.

Oinats, A.V., V.I. Kurkin, N. Nishitani, and M.A. Chernigovskaya, Meteorological effects
observed by SuperDARN Hokkaido radar in the ionosphere, 39th COSPAR Scientific Assembly,
Mysore, India, 2012.7.14-22.

Nishitani, N., M. Teramoto, and SuperDARN Hokkaido radar group, Dynamics of Sub Auroral
Polarization Streams Observed by the SuperDARN Hokkaido Radar During Large Geomagnetic
Storms, 2012 Fall AGU Meeting, San Francisco, USA, 2012.12.3-7.

Teramoto, M., N. Nishitani, T. Hori, J.C. Devlin, V. Angelopoulos, K.-H. Glassmeier,
L. Clausen, W. Baumjohann, J.W. Bonnell, and F. Mozer, Second harmonic Pi2 pulsation
observed near the plasmapause by the Asian-Oceanian SuperDARN radars and THEMIS
satellites, 2012 Fall AGU Meeting, San Francisco, USA, 2012.12.3-7.

Matsushita, T., K. Seki, N. Nishitani, T. Hori, M. Teramoto, T. Kikuchi, Y. Miyoshi,
H. Reme, and H.J. Singer, Propagation of ULF waves into mid-latitudes ionosphere
directly driven by solar wind dynamic pressure variations, 2012 Fall AGU Meeting, San
Francisco, USA, 2012.12.3-7.



2011

Nishitani, N., T. Ogawa, T. Kikuchi, T. Hori, and SuperDARN Hokkaido radar group,
Characteristics of ionospheric responses to solar flares observed by the SuperDARN
Hokkaido radar, SuperDARN Workshop 2011, Hanover, USA, 2011.5.30-6.3.

Zou, Y., and N. Nishitani, Study of mid-latitude ionospheric convection during
super quiet, quiet and disturbed period with the SuperDARN Hokkaido radar,SuperDARN
Hokkaido radar, SuperDARN Workshop 2011, Hanover, USA, 2011.5.30-6.3.

Ogawa, T., T. Adachi, and N. Nishitani, Medium-scale traveling ionospheric
disturbances simultaneously observed with the SuperDARN Hokkaido radar and
FORMOSAT/ISUAL, SuperDARN Workshop 2011, Hanover, USA, 2011.5.30-6.3.

Nishitani, N., and SuperDARN Hokkaido rada rgroup, Study of magnetosphere-ionosphere-
thermosphere coupling using the SuperDARN Hokkaido radar,
Korea-Japan Space Weather Workshop 2011, Daejeon, Korea, 2011.9.29-10.1.

Oinats, A.V., V.I. Kurkin, K.A. Kutelev, and N. Nishitani, Study of large-scale
traveling ionospheric disturbances using the data of SuperDARN Hokkaido radar and
Russian chirp sounding network, URSI GASS 2011, Istanbul, Turkey, 2011.8.13-20.

Teramoto, M., N. Nishitani, and K. Shiokawa, Comparison between ionospheric Doppler
velocity oscillations observed by the SuperDARN Hokkaido radar and low-latitude Pi2
pulsations, 2011 Fall AGU Meeting, San Francisco, USA, 2011.12.5-9.

Zou, Y.	and N. Nishitani, Superposed epoch analysis of mid-latitude ionospheric
convection during disturbed periods with the SuperDARN Hokkaido radar, 2011 Fall
AGU Meeting, San Francisco, USA, 2011.12.5-9.

Kim, K, J. Park, D. Lee, Y. Park, V. Angelopoulos, N. Nishitani, T. Hori, K. Shiokawa,
K. Yumoto, K. Koga, and T. Obara, Magnetospheric and ionospheric responses to the
passage of solar wind discontinuity on 24 November 2008, 2011 Fall AGU Meeting,
San Francisco, USA, 2011.12.5-9.


2010

Nishitani, N., Study of Magnetosphere-Ionosphere-Thermosphere Coupling Using the
SuperDARN Network (invited), WCU International Workshop 2010, Seoul Korea, 2010.4.12-13.

Nishitani, N., T. Ogawa, T. Kikuchi, Y. Ebihara, R. Kataoka, T. Hori, and K. Hosokawa,
Characteristics of Recurrent / Propagating SAPS / SAID Structures Observed by the
SuperDARN Hokkaido Radar, SuperDARN Workshop 2010, Hermanus, South Africa, 2010.5.31-6.4.

Ogawa, T., N. Nishitani, S. Kawamura, and Y. Murayama, Mesosphere summer echoes
observed with the SuperDARN Hokkaido radar in combination with VHF and MF radars,
SuperDARN Workshop 2010, Hermanus, South Africa, 2010.5.31-6.4.

Zou, Y. and N. Nishitani, Study of mid-latitude ionospheric convection during quiet
and disturbed periods with the SuperDARN Hokkaido HF radar, SuperDARN Workshop 2010,
Hermanus, South Africa, 2010.5.31-6.4.

Ichihara, A., N. Nishitani, T. Ogawa, and T. Tsugawa, Nighttime MSTIDs propagating
northward observed by the Hokkaido HF radar and GEONET, SuperDARN Workshop 2010,
Hermanus, South Africa, 2010.5.31-6.4.

Hosokawa, K., T. Tsugawa, K. Shiokawa, Y. Otsuka, N. Nishitani, T. Ogawa, and M. 
Hairston, Multi-instrumental comprehensive study of polar cap tongue of ionization
during magnetic storm on December 15, 2006, 38th COSPAR Scientific Assembly, Bremen,
Germany, 2010.7.18-25.

Oinats, A., V.I. Kurkin, and N. Nishitani, Study of TIDs using joint SuperDARN radar and
oblique chirp sounding data, 38th COSPAR Scientific Assembly, Bremen, Germany,
2010.7.18-25.

Zou, Y., and N. Nishitani, Study of mid-latitude ionosphere convection during quiet and
disturbed periods with the SuperDARN Hokkaido radar, AP-RASC'10, Toyama, Japan,
2010.9.22-26.

Nishitani, N., T. Ogawa, T. Kikuchi, Y. Ebihara, R. Kataoka, T. Hori, and K. Hosokawa,
Characteristics of recurrent/propagating SAPS/SAID structures observed by the SuperDARN
Hokkaido radar, AP-RASC'10, Toyama, Japan, 2010.9.22-26.

Nishitani, N., T. Ogawa, T. Kikuchi, Y. Ebihara, T. Hori, Y. Zou, K. Hosokawa,
R. Kataoka, and SuperDARN Hokkaido radar group, Oscillation of SAPS/SAID
structures with various temporal scales observed by the SuperDARN Hokkaido radar,
AGU Fall Meeting 2010, San Francisco, USA, 2010.12.13-17.


2009

Hosokawa, K., T. Tsugawa, K. Shiokawa, N. Nishitani, Y. Otsuka, and T. Ogawa,
Polar cap tongue of ionization during magnetic storm on December 14-15, 2006,
SuperDARN Workshop 2009, Cargese, Corsica, France, 2009.5.11-15.

Koustov, A.V., N. Nishitani, P.V. Ponomarenko, K. Shiokawa, S. Suzuki, B.M.
Shevtsov, and J.W. MacDougall, Joint observations of a TID with the Paratunka OMTI
camera and the Hokkaido HF radar, SuperDARN Workshop 2009, Cargese, Corsica, France,
2009.5.11-15.

Hayashi, H., N. Nishitani, T. Ogawa, Y. Otsuka, T. Tsugawa, K. Hosokawa, and
A. Saito, Large-Scale traveling ionospheric disturbances observed by SuperDARN
Hokkaido HF radar and GPS networks, SuperDARN Workshop 2009, Cargese, Corsica,
France, 2009.5.11-15.

Ogawa, T., N. Nishitani, and Y. Murayama, Backscatter and reflection echoes from
sporadic E layers observed with the SuperDARN Hokkaido radar, SuperDARN Workshop
2009, Cargese, Corsica, France, 2009.5.11-15.

Nishitani, N., Multi-Scale Traveling Ionospheric Disturbance Observed by SuperDARN
(invited), BAYSIS-2009, Irkutsk, Russia, 2009.9.7-12.

Ichihara, A., N. Nishitani, T. Ogawa, and T. Tsugawak, Nighttime medium-scale
traveling ionospheric disturbances propagating northward observed by the SuperDARN
Hokkaido HF radar and GEONET, IRI2009 Workshop, Kagoshima, Japan, 2009.11.2-7.

Nishitani, N., T. Ogawa, T. Kikuchi, Y. Ebihara, R. Kataoka, T. Hori, and K. Hosokawa,
SuperDARN Hokkaido Radar Observation of Recurrent Propagating SAID/SAPS Structure,
AGU Fall Meeting 2009, San Francisco, USA, 2009.12.14-18.

Ichihara, A., N. Nishitani, T. Ogawa, and T. Tsugawa, Nighttime medium-scale traveling
ionospheric disturbances propagating northward observed by the SuperDARN Hokkaido HF
radar and GEONET, AGU Fall Meeting 2009, San Francisco, USA, 2009.12.14-18.

Hosokawa, K., T. Tsugawa, K. Shiokawa, N. Nishitani, Y. Otsuka, T.Ogawa, and M. R. 
Hairston, Multi-instrumental comprehensive study of polar cap tongue of ionization
during magnetic storm on December 15, 2006, AGU Fall Meeting 2009, San Francisco,
USA, 2009.12.14-18.


2008

Koustov, A.V., N. Nishitani, Y. Ebihara, T. Kikuchi, M. R. Hairston and D. Andre,
SAPS: Observations with the Hokkaido and King Salmon SuperDARN radars and modelling,
SuperDARN Workshop 2008, Newcastle, Australia, 2008.6.2-6.

Nishitani, N., T. Ogawa, T. Kikuchi, H. Tsutsui, and A. Ichihara, Statistical
results from the 1-year observation of the Doppler velocities by the SuperDARN
Hokkaido radar, SuperDARN Workshop 2008, Newcastle, Australia, 2008.6.2-6.

Nishitani, N., T. Kikuchi, T. Ogawa, S. Watari, and T. Hori, SuperDARN observation
of equatorward progression of dayside merging flows during a geomagnetic storm,
SuperDARN Workshop 2008, Newcastle, Australia, 2008.6.2-6.

Ogawa, T., N. Nishitani, Y. Otsuka, K. Shiokawa, and T. Tsugawa, SuperDARN Hokkaido
radar observations of nighttime medium-scale traveling ionospheric disturbances
and sporadic E irregularities, SuperDARN Workshop 2008, Newcastle, Australia,
2008.6.2-6.

Nishitani, N., T. Ogawa, T. Kikuchi, K. Hosokawa, R. Kataoka, and Y. Ebihara, 
SuperDARN Hokkaido radar: Overview of 1 year observation (invited), AOGS 2008,
Busan, Korea, 2008.6.16-20.

Kataoka, R., K. Hosokawa, N. Nishitani, and Y. Miyoshi, SuperDARN Hokkaido Radar
Observation of Subauroral Convection Flow Enhancement, AOGS 2008, Busan, Korea,
2008.6.16-20.

Ogawa, T., N. Nishitani, Y. Otsuka, K. Shiokawa, T. Tsugawa, and A. Saito,
Simultaneous SuperDARN Hokkaido Radar, GEONET and All-Sky Imager Observations
of Mid-Latitude Medium-Scale Traveling Ionospheric Disturbances and Sporadic E
Irregularities, AOGS 2008, Busan, Korea, 2008.6.16-20.

Hayashi, H., N. Nishitani, T. Ogawa, Y. Otsuka, T. Tsugawa, K. Hosokawa, and
A. Saito, LSTID event on December 15, 2006 observed by SuperDARN Hokkaido HF
radar and GEONET, AOGS 2008, Busan, Korea, 2008.6.16-20.

Kikuchi, T., Y. Ebihara, K. Hashimoto, R. Kataoka, T. Hori, S. Watari, and
N. Nishitani, Magnetometer and SuperDARN Observations of the Stormtime Electric
Fields at Mid-Equatorial Latitudes, AOGS 2008, Busan, Korea, 2008.6.16-20.

Shiokawa, K., Y. Otsuka, N. Nishitani, T. Ogawa, T. Tsugawa, S. Smirnov,
V. Bychkov, and B. Shevtsov, Turning of MSTID Motion From Southwestward to
Northeastward Observed by an Airglow Imager at Paratunka, Russia, AOGS 2008, Busan,
Korea, 2008.6.16-20.

Koustov, A.V., N. Nishitani, T. Kikuchi, and Y. Ebihara, Subauroral polarization
streams: Observations with the Hokkaido and King Salmon SuperDARN radars and modeling,
37th COSPAR Scientific Assembly, Montreal, Canada, 2008.7.13-20.

Nishitani, N., T. Ogawa, T. Kikuchi, T. Hori, H. Tsutsui, A. Ichihara, K. Hosokawa,
R. Kataoka, Y. Ebihara, and SuperDARN Hokkaido radar group, SuperDARN Hokkaido radar:
Overview of 1 year observation, Chiha-Japan Joint Seminar, NIPR, Tokyo, Japan,
2008.8.6-7.

Nishitani, N., Japanese SuperDARN activities in relation to Russian SuperDARN,
International workshop "SuperDARN as a powerful instrument for space science
research:  Principles, technique, results", Irkutsk, Russia, 2008.8.26-29.

Nishitani, N., T. Ogawa, T. Kikuchi, S. Watari, T. Hori, R. Kataoka, K. Hosokawa,
Y. Miyoshi, N. Sato, A.S. Yukimatu, Hokkaido HF radar group, and SuperARN PIs, 
SuperDARN Hokkaido radar / Today and future of mid-latitude SuperDARN network,
International Symposium: ERG, SCOPE and Beyond, ISAS, Sagamihara, Japan,
2008.11.26-28.

Suzuki, S., K. Hosokawa, T.F. Shibata, K. Shiokawa, Y. Otsuka, N. Nishitani, T. Ogawa,
A.V. Koustov, and B.M. Shevtsov, Coordinated observations of a nighttime medium-scale
traveling ionospheric disturbance in 630-nm airglow and HF radar echoes, AGU Fall
Meeting 2008, San Francisco, USA, 2008.12.15-19.

Kikuchi, T., Y. Ebihara, K.K. Hashimoto, R. Kataoka, T. Hori, S. Watari, and
N. Nishitani, Convection and overshielding electric fields in the global
ionosphere as observed with magnetometers and SuperDARN during the geomagnetic
storm on 14-15 December 2006, AGU Fall Meeting 2008, San Francisco, USA, 2008.12.15-19.

Hosokawa, K. T. Tsugawa, K. Shiokawa, N. Nishitani, Y. Otsuka, T. Ogawa, and M.R.
Hairston, Radio and optical observation of polar cap tongue of ionization during
the geomagnetic storm on December 15, 2006, AGU Fall Meeting 2008, San Francisco,
USA, 2008.12.15-19.
 
Ebihara, Y., N. Nishitani, T. Kikuchi, T. Ogawa, K. Hosokawa, M. Fok, and M.F. Thomsen,
Dynamical property of storm-time subauroral rapid flows as a manifestation of
complex structures of the plasma pressure in the inner magnetosphere: Simulation
and SuperDARN Hokkaido radar observation, AGU Fall Meeting 2008, San Francisco,
USA, 2008.12.15-19.


2007

Nishitani, N., T. Ogawa, T. Kikuchi, R. Kataoka, K. Hosokawa, Y. Miyoshi, N. Sato,
H. Yamagishi, A. S. Yukimatu, and Hokkaido Radar Group, Initial observation with
the Hokkaido radar, SuperDARN Workshop 2007, Abashiri, Japan, 2007.6.4-8.

Shinohara, M., A. Ikeda, K. Nozaki, V. V. Bychkov, B. M. Shevtsov, N. Nishitani,
and K. Yumoto, Measurements of ionospheric electric field fluctuations by FM-CW
HF radar in the field of view of the SuperDARN Hokkaido radar, SuperDARN Workshop
2007, Abashiri, Japan, 2007.6.4-8.

Nishitani, N., T. Ogawa, T. Kikuchi, R. Kataoka, Y. Miyoshi, K. Hosokawa,
K. Shiokawa, Y. Otsuka, N. Sato, H. Yamagishi, and A. S. Yukimatu, Hokkaido
radar observation of dayside merging flows during a large storm, SuperDARN Workshop
2007, Abashiri, Japan, 2007.6.4-8.

Kataoka, R., N. Nishitani, T. Kikuchi, T. Ogawa, K. Hosokawa, and Y. Ebihara,
SuperDARN Hokkaido radar observations of ionospheric convection during magnetic
storms, SuperDARN Workshop 2007, Abashiri, Japan, 2007.6.4-8.

Hosokawa, K., N. Nishitani, R. Kataoka, and T. Ogawa, Initial backscatter occurrence
statistics from the Hokkaido SuperDARN radar, SuperDARN Workshop 2007, Abashiri,
Japan, 2007.6.4-8.

Ebihara, Y., N. Nishitani, T. Kikuchi, T. Ogawa, K. Hosokawa, and M.-C. Fok,
Possible observation of spatial and temporal structure of the "overshielding" from
the SuperDARN Hokkaido radar, SuperDARN Workshop 2007, Abashiri, Japan, 2007.6.4-8.

Kikuchi, T., Y. Ebihara, K. K. Hashimoto, R. Kataoka, N. Nishitani, K. Ohtaka,
K. Kitamura, and W. A. Bristow, Penetration of storm-time electric field to low
latitude, SuperDARN Workshop 2007, Abashiri, Japan, 2007.6.4-8.

Ogawa, T., Look back on polar ionosphere and mesosphere observations with the
SuperDARN radars (invited), SuperDARN Workshop 2007, Abashiri, Japan, 2007.6.4-8.

Otsuka, Y., Y. Yamaya, N. Nishitani, and T. Ogawa, Observations of ionospheric
variations following the 13 January 2007 earthquake using GPS and Hokkaido HF radar,
SuperDARN Workshop 2007, Abashiri, Japan, 2007.6.4-8.

Ishida, T., K. Hosokawa, T. F. Shibata, and N. Nishitani, Characteristics of the
MSTIDs' long-range propagation: simultaneous observations at auroral and
mid-latitudes, SuperDARN Workshop 2007, Abashiri, Japan, 2007.6.4-8.

Ogawa, T., N. Nishitani, Y. Otsuka, T. Tsugawa, and A. Saito, Medium-scale traveling
ionospheric disturbances observed by the SuperDARN Hokkaido radar and GEONET: A case
study, SuperDARN Workshop 2007, Abashiri, Japan, 2007.6.4-8.

Nishitani, N., T. Ogawa, T. Kikuchi, R. Kataoka, K. Hosokawa, Y. Miyoshi, N. Sato,
H. Yamagishi, A. S. Yukimatu, and Hokkaido Radar Group, Initial results from the
SuperDARN Hokkaido radar observation: Intense poleward flows near the dayside
merging region at about 58 geomagnetic latitude, IUGG XXIV 2007, Perrugia, Italy,
2007.7.2-13.

Kataoka, R., N. Nishitani, T. Kikuchi, T. Ogawa, K. Hosokawa, and Hokkaido HF
radar group, Initial results from the SuperDARN Hokkaido radar observation:
Nightside ionospheric convection in mid-latitudes during magnetic storms,
IUGG XXIV 2007, Perrugia, Italy, 2007.7.2-13.

Nishitani, N., T. Ogawa, T. Kikuchi, R. Kataoka, K. Hosokawa, Y. Miyoshi,
N. Sato, H. Yamagishi, A. S. Yukimatu, and Hokkaido HF Radar Group, Early
Results from the SuperDARN Hokkaido Radar, International CAWSES symposium,
Kyoto, Japan, 2007.10.23-27.

Ebihara, Y., N. Nishitani, T. Kikuchi, T. Ogawa, K. Hosokawa, and M.-C. Fok,
First two-dimensional observations of overshielding by the SuperDARN Hokkaido
radar (invited), AGU Fall Meeting 2007, San Francisco, USA, 2007.12.10-14.

Kataoka, R., N. Nishitani, Y. Ebihara, K. Hosokawa, T. Ogawa, T. Kikuchi,
and Y. Miyoshi, SuperDARN Hokkaido HF radar observation of subauroral
ionospheric convection during storms (invited), AGU Fall Meeting 2007, San
Francisco, USA, 2007.12.10-14.


2006

Nishitani, N., T. Ogawa, T. Kikuchi, Y. Miyoshi, R. Kataoka, K. Shiokawa, and
Y. Otsuka, K. Hosokawa, N. Sato, H. Yamagishi, and A. S. Yukimatu, A. Saito, and
Hokkaido radar group, Hokkaido radar - expansion of SuperDARN field of view into
mid-latitudes (invited), FORMOSAT-3/COSMIC Workshop 2006 - Early Results and IOP
Campaigns, Taipei, Taiwan, 2006/11/28-12/1.