本論文以福衛三號精密軌道定位天線觀測資料分析電漿層垂直全電子含量分佈情形。我們使用了SPIM模式探討電離層與電漿層的分界約在距地表兩千多公里的高度，並且利用TWIM模式對原始資料做修正。根據修正後的資料發現電漿層之垂直全電子含量無顯著之日夜變化情形，而與電離層相比，電漿層垂直全電子含量遠較其低。 由資料繪圖結果分析得知，電漿層之垂直全電子含量分佈特性為：約4-6TECU分佈在地理緯度60度以下之中低緯地區、約2TECU分佈在地理緯度60度以上之高緯地區。 This thesis analyzes distribution of the plasmasphere vertical total electron content (VTEC) using Precise Orbit Determination (POD) antennas onboard the FORMOSAT-3/COSMIC (F3/C) satellites. We used Standard Plasmasphere - Ionosphere Model (SPIM) to investigate the boundary between the ionosphere and the plasmasphere and concluded that the boundary is about 2000km above the ground. We also employed the TaiWan Ionospheric Model (TWIM) to remove the TEC parts (<~ 2000km). Based on the VTEC data after correction, we discovered that there is no apparent diurnal variation of VTEC in the plasmasphere, whose magnitude is far less than that of the ionosphere. We can further conclude that the characteristic of the plasmaspheric VTEC distribution is about 4-6 TECU in geographic mid-latitude (<60ﾟ) and is about 2 TECU in the rest of high-latitude region.
