Summary
International Symposium on Antennas and Propagation
2012
Session Number:4D3
Session:
Number:4D3-1
Observations of Ionospheric Radio Propagations in the Arctic and the Mid-latitude Regions
Masahiro Nishi, Ryoichi Matsutani, Koichi Shin, Teruaki Yoshida,
pp.-
Publication Date:2012/10/29
Online ISSN:2188-5079
Summary:
The authors newly installed the radio observation sites in Kiruna, Sweden in addition to Noro and Misato to observe MF band ionospheric propagations. And we have continued the observations since their installations to investigate or compare the propagation features between the Arctic and the mid-latitude regions. Our observations in MF band were started from June in 2010 at Noro and Misato sites and started from September in 2011 at Kiruna site. From the observational results, it was found that, only in the Arctic, there were unusual variations of the received levels without rising up, which were observed a few days after the solar flare occurred. And it was concluded that in the MF band, the ionospheric radio propagations in the Arctic were more sensitively affected by the solar flare than propagations in the mid-latitude region.