Propagation characteristics of the Pc3 frequency range pulsation in the cusp latitude

• Main Authors: Yonghua, Liu, Ruiyuan, Liu, Shaofeng, Yang, Longsong, He, Fraser, B. J.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Polar Research Institute of China - PRIC 1999
• Subjects: Davis Station; Davis-Station; Zhongshan; Zhongshan Station; Advances in Polar Science; Antarc*; Antarctica; Polar Science
• Online Access: http://library.arcticportal.org/2189/; http://library.arcticportal.org/2189/1/A199902012.pdf

Two induction magnetometers have been installed at Zhongshan Station and Davis Station, Antarctica respectively. We adopt with cross-spectral analysis technique to analyze the data of the two induction magnetometers, in June, September, December 1996 and March 1997, to investigate the Pc3 frequency range pulsation occurrence and propagation characteristics in the cusp latitude. The results are summarized as following: At Zhongshan-Davis Station, the Pc3 frequency range pulsations occur mainly around the local noon/ local magnetic noon and local magnetic midnight respectively. In daytime, the pulsation have a seasonal variation in amplitude, occurrence and temporal range, all of them are smallest in winter. But in nighttime, the pulsations have no such a variation. The pulsation amplitude in nighttime is much larger than the one in daytime all over the year. The pulsation propagating direction is mainly western in daytime and irregularly in nighttime. It can be thought that the different sources of the pulsation and the ionospheric electric conductivity are mainly responsible for these characteristics.