15:30 〜 17:00
[PEM15-P16] Latest activities of i-SPES & Kyutech FM-CW project
キーワード：電離圏観測、FM-CWレーダー、ソフトウェアラジオGPSシンチレーション計測器
An FM-CW (Frequency Modulated Continuous Wave) radar is a type of HF (High Frequency) radar. We have installed and operated four FM-CW stations along the Japanese longitude, in Japan, Russia, Philippine, and Peru, to measure the electric fields penetrating the ionosphere. One of the FM-CW project goals is to understand the relationship between Equatorial Electrojet (EEJ) and the generation mechanism of the Equatorial Spread F (ESF) associated with Equatorial Plasma Bubbles (EPBs).
Radio communications and radio navigation (GPS: global positioning system, GNSS: Global Navigation Satellite System) are used in worldwide and widely deployed in a variety of fields, for example, tracking, automated vehicle, clock synchronization or sport analysis. The structure of ionosphere is not stable and variable in the time of day, season, latitude, and solar activity, because of the differences of the energetic photo-ionization process. The irregularities and disturbances in the ionosphere cause various severe problems, for example, lower accuracy of the radio navigation due to GPS/GNSS scintillation, disruption in High Frequency (HF) radio wave bands or interference due to anomalous propagation, etc. Especially, more robust correction models for ionospheric GPS/GNSS delay errors are required to enhance the utility value of GPS/GNSS clock synchronization for the fifth generation (5G) wireless technology. Also, the real-time alert for interference on HF radio waves is necessary for the safety navigation.
We have been developing the SDR (Software-Defined Radio)-based scintillation detector system integrated with FM-CW and MAGDAS (http://data.icswse.kyushu-u.ac.jp) projects.
In this paper, we will present the following latest activities of our project: FM-CW observation data archive and QL search system on our website for public access, Proposal of a new detection method of Ionogram echoes, and latest status of development of software radio-GPS scintillation measurements.
Radio communications and radio navigation (GPS: global positioning system, GNSS: Global Navigation Satellite System) are used in worldwide and widely deployed in a variety of fields, for example, tracking, automated vehicle, clock synchronization or sport analysis. The structure of ionosphere is not stable and variable in the time of day, season, latitude, and solar activity, because of the differences of the energetic photo-ionization process. The irregularities and disturbances in the ionosphere cause various severe problems, for example, lower accuracy of the radio navigation due to GPS/GNSS scintillation, disruption in High Frequency (HF) radio wave bands or interference due to anomalous propagation, etc. Especially, more robust correction models for ionospheric GPS/GNSS delay errors are required to enhance the utility value of GPS/GNSS clock synchronization for the fifth generation (5G) wireless technology. Also, the real-time alert for interference on HF radio waves is necessary for the safety navigation.
We have been developing the SDR (Software-Defined Radio)-based scintillation detector system integrated with FM-CW and MAGDAS (http://data.icswse.kyushu-u.ac.jp) projects.
In this paper, we will present the following latest activities of our project: FM-CW observation data archive and QL search system on our website for public access, Proposal of a new detection method of Ionogram echoes, and latest status of development of software radio-GPS scintillation measurements.