HR: 1340h
AN: SA13A-1080    [Abstracts]
TI: Observations of tri-band beacon signal scintillation in the Taiwan zone
AU: * Tung-Yuan, H
EM: TungYuanHsiao@gmail.com
AF: Institute of Space Science, National Central University, No.300, Jung-Da Road, Chung-Li, 32001, Taiwan
AU: Lung-Chih, T
EM: lctsai@csrsr.ncu.edu.tw
AF: Center for Space and Remote Sensing Research, National Central University, No.300, Jung-Da Road, Chung-Li, 32001, Taiwan
AU: Chao-Han, L
EM: chliu2@gate.sinica.edu.tw
AF: Academia Sinica, 128, Academia Road, Sec. 2, Nankang, Taiwan, 115, Taiwan
AB: By applying the differential Doppler technique on three quadrature components of tri-band beacon signals, we were able to obtain total electric contents (TEC) values and scintillation along the radio path through the ionosphere. Such measurements can be used to derive the regional ionospheric irregularity and tomography (P. A. Bernhardt et. al, 2000). There are 83 scintillation days from April 2006 to April 2007 (395 days) and occurred usually at 18~05 LT in the night time, especially at pre-midnight or post-midnight. Scintillations at low-latitude have high correlation with months when Kp less than 3. They are usually happened at May-June and December- February less than the other months. On the contrary, scintillations are normally more frequent during the equinoctial months of August¡VOctober and March¡VApril. Meanwhile there are 16 scintillation days happened when Kp large than 3. During the equinoctial months of August¡VOctober and Mar¡VApril, when scintillations are normally more frequent, the generation of equatorial irregularities is in general absent during magnetic disturbances. Meanwhile, we show a typical blob event at 150N MLAT near the midnight, and approach the correctly location of the F region step by step by a simple optical model when the radio signals traveled through them, where they were subsequently compared the irregularity structure with the results of the Chung-Li Dynasonde (MF/HF radar) and the ionospheric tomography reconstruction.
DE: 2403 Active experiments
DE: 2415 Equatorial ionosphere
DE: 2439 Ionospheric irregularities
DE: 2443 Midlatitude ionosphere
DE: 3369 Thermospheric dynamics (0358)
SC: SPA-Aeronomy [SA]
MN: 2007 Fall Meeting