
Verification of the Time Accuracy of a Magnometer by Using a GPS Pulse Generator
Yasuhiro Minamoto, Nobuyuki Kumasaka, Toshiaki Mishima, Takeshi Oowada, Takashi Okawa

Monitoring and Correction Methods for Geomagnetic Data Influenced by Artificial Disturbances
Shingo Nagamachi, Kenji Morinaga, Yoshitomo Ikoma, Mayumi Akutagawa, Takashi Moriyama, Takeshi Oowada, Tetsuo Tokumoto