Advances in Polar Upper Atmosphere Research

No. 20

CONTENTS

Similarity and dissimilarity of conjugate relationships of Pi magnetic pulsations observed during excellent similar auroras
‥ Tohru Sakurai, Akira Kadokura, Natsuo Sato and Yutaka Tonegawa ‥・　　1

Neutral atom emission coming from the direction of the high-latitude magnetopause under northward IMF
‥ Satoshi Taguchi, Keisuke Hosokawa, Yozo Murata, Akira Nakao, Michael R. Collier, Thomas E. Moore, Natsuo Sato and Akira S. Yukimatu ‥・　 17

Solar zenith angle and solar activity dependences of vertical profile of electron number density in the nightside auroral region
‥ Atsushi Kumamoto, Takayuki Ono and Masahide Iizima ‥・　 27


Research notes

Anti-diamagnetic (paramagnetic) properties of slow mode waves in anisotropic plasma pressures
‥ Osuke Saka ‥・　 38

Field-aligned plasma motion in the converging field line geometry of anisotropic plasma pressure
‥ Osuke Saka ‥・　 46

High energy electron observation by Polar Patrol Balloon flight in Antarctica
‥ Shoji Torii, Tadahisa Tamura, Kenji Yoshida, Hisashi Kitamura, Takamasa Yamagami, Hiroyuki Murakami, Nobuhito Tateyama, Jun Nishimura, Yoshitaka Saito, Shigeo Ohta, Michiyoshi Namiki, Yukihiko Matsuzaka, Issei Iijima, Masaki Ejiri, Hisao Yamagishi, Akira Kadokura, Makio Shibata, Yusaku Katayose, Katsuaki Kasahara, Kohei Mizutani, Tadashi Kobayashi, Yoshiko Komori, Toshinori Yuda and Jin Chang ‥・　 52


Review

Ground-based radar detection of the equatorward boundary of ion auroral oval in the dusk-midnight sector and its dynamical association with substorms
‥ P.T. Jayachandran, J.W. MacDougall and E.F. Donovan ‥・　63


Report

Initial results of Husafell solar radio spectrograph
‥ Yasuaki Hiyama, Takayuki Ono, Masahide Iizima, Hiroaki Misawa, Fuminori Tsuchiya, Akira Morioka and Natsuo Sato ‥・　76