Comparison study on ionospheric spread-F between high and low latitude regions during the storm time
Abstract
We use DPS-4 digisonde measurement data from ionospheric station Hainan (19.4N, 109.0E), China, and Yakutsk (62N, 129E) and Zhigansk (66N, 123E), Russia to study ionospheric Spread-F (SF) properties during the magnetic storm time. The results show that: (1) The SF can take place in any phase (suddenly commencement, main phase and recovery phase). (2) The SF always take place from about 2000LT to around midnight, and the more the latitude is, the earlier the SF takes place. (3) Yakutsk station has a higher occurrence of SF than that both in the higher latitude station (Zhigansk) and lower latitude station (Hainan). (4) The frequency SF, range SF and mixed SF can be observed at any latitude station. The strong range SF can only be observed at Hainan station (low latitude station) and it confirms that the strong range SF concerns the equatorial plasma bubble. Our results indicate that ionospheric disturbance which causes the SF, during the storm time, is original from the higher latitude region and propagate to the lower region. Sometimes it could excite out SF at low latitude region and sometimes it could not.
- Publication:
-
38th COSPAR Scientific Assembly
- Pub Date:
- 2010
- Bibcode:
- 2010cosp...38.1490S