本篇論文利用福爾摩沙衛星三號的電離層的電子參數資料，與太陽輻射指數作資料分析並研究其相關性。太陽11年的週期變化會影響太陽輻射強度，其中10.7公分的波段被稱為太陽輻射F10.7指數，與太陽的活動性有關。主要的研究目的是瞭解地磁活動安靜期時，太陽輻射F10.7指數對電離層F2層的最大電子濃度(NmF2)的影響，並研究累積天數的F10.7指數平均值與不同季節NmF2的相關性。我們利用2006至2010的觀測資料作分析，觀察到NmF2與F10.7指數的相關係數，在秋季的磁當地時間5時至12時有上升的趨勢並且在16時至20時開始下降 。並更進一步分析發現秋季在地理經度60度至180度的區域NmF2及F10.7的相關係數較顯著，此現象應該與垂直向的E×B飄移速度變化有關。另外觀察到秋季時NmF2與F10.7指數的累積平均值的相關係數在地磁緯度和地理緯度-30°至-60°中，所有磁當地時間的累積天數到7至8天，相關係數上升至最大值。

The purpose of this thesis is to study the relation between the solar radio flux and ionospheric electron parameters based on FORMOSAT-3/COSMIC data. The terrestrial ionospheric electron densities have been found to be associated with the intensity of solar radiation. The 11-year solar cycle influences the intensity of solar radiation. The radio radiation observed at the wavelength of 10.7 cm, known as F10.7 flux, has been found to be associated with solar activity. We analyze the seasonal correlations of maximum electron densities of F2 layer (NmF2) with F10.7 and the average of accumulated F10.7 at geomagnetic quiet time from 2006 to 2010. As a result, we have discovered the correlations of NmF2 and F10.7 increase between 0500MLT and 1200MLT and decrease from 1600MLT to 2000MLT at all MLAT in autumn. Further analysis shows that the above feature is most distinguished in geographic longitude from 60° to 180° and may be interpreted by variations of vertical E ⃑×B ⃑ drifts. We also have found that the correlations of NmF2 and average of accumulated F10.7 increase up to 7 or 8 days prior to the observational day of the NmF2 at both MLAT and GLAT from -30° to -60° obviously in autumn.

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