中華衛星一號觀測電離層電漿氣泡密度變化之統計及研究

• Main Author: 何旭慧
• Other Authors: 蘇信一
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/15825545687825441319

碩士 === 國立中央大學 === 太空科學研究所 === 89 === Abstract Gathered during the year 2000 from the ion trop sensor on the ROCSAT-1, a satellite in a circular orbit at the height of 600km, the high resolution ion density data in the equatorial spread F (ESF) events are analyzed in the thesis. The occurrence distributions of the plasma bubbles with seasons, locations, and magnetic activities have been obtained. During quite times, the ESF events are most likely to occur around 2000 LT. With the increase in magnetic activity, the plasma bubbles appear frequently from midnight to sunrise. The probability of the plasma bubbles occurrence is always high near 0 longitude all year long. The seasonal occurrence is such that it is high in the pacific regions (between 120 and 150 longitude) during northern summer and in the south of America (between -60 - -30 longitude) during northern winter. The result of the spectra analysis for the ESF events, indicate that the spectral index in three scales ranges changes as function as local time during 1800-2000 LT under the condition Kp 3+, and during 0300-0600 LT in the strong geomagnetic activities (Kp 4-).