博碩士論文 966203018 完整後設資料紀錄

DC 欄位	值	語言
DC.contributor	太空科學研究所	zh_TW
DC.creator	張榮華	zh_TW
DC.creator	Jung-hua Chang	en_US
dc.date.accessioned	2009-7-14T07:39:07Z
dc.date.available	2009-7-14T07:39:07Z
dc.date.issued	2009
dc.identifier.uri	http://ir.lib.ncu.edu.tw:88/thesis/view_etd.asp?URN=966203018
dc.contributor.department	太空科學研究所	zh_TW
DC.description	國立中央大學	zh_TW
DC.description	National Central University	en_US
dc.description.abstract	本篇論文是使用福爾摩沙衛星三號ionPhs(Level1)的資料進行GPS掩星法的計算，可反演出電離層之電子濃度；其演算方式是參考[Antonio Rius, 1997]論文中所提到的方式，由ionPhs中超額相位和衛星的位置和速度的資料可算出偏折角(bending angle)，再利用Abel transform積分法算出折射指數(index of refractivity)，進而算出電離層之電子濃度(Electron density)。最後，將會比較和討論COSMIC之反演法與[Antonio Rius, 1997]論文中其反演法之差異，再跟福衛三號ionPrf(Level2)之電子濃度做交叉比對，並且討論及誤差之分析。結果與討論之重點會放在模擬的部份，希望可以透過模擬的方式，進一步探討GPS掩星反演法演算之準確性，且可以確認[Antonio Rius, 1997]論文中之反演法和計算過程的誤差值，再分別討論其結果。	zh_TW
dc.description.abstract	The ionospheric electron density profile can be retrieved from total electron content (TEC) by using Abel method, which is measured by LEO satellite from GPS signal. However, the excess phase information of GPS signals received by COSMIC satellites can also used to retrieve electron density profile in accordant with radio occultation technique, in which the bending angle of GPS is calculated and the ionosphere refractive index is converted using the Abel transform that contains electron density information. In this presentation, the electron density profiles obtained by piercing method and bending angle of GPS ray are compared and the discrepancies in the two are discussed.	en_US
DC.subject	全球定位系統	zh_TW
DC.subject	福爾摩沙衛星三號	zh_TW
DC.subject	電離層	zh_TW
DC.subject	反演	zh_TW
DC.subject	掩星	zh_TW
DC.subject	ionosphere	en_US
DC.subject	FORMOSAT-3	en_US
DC.subject	COSMIC	en_US
DC.subject	GPS	en_US
DC.subject	Occultation	en_US
DC.title	GPS電波掩星法之研究	zh_TW
dc.language.iso	zh-TW	zh-TW
DC.title	Research of GPS Radio Occultation	en_US
DC.type	博碩士論文	zh_TW
DC.type	thesis	en_US
DC.publisher	National Central University	en_US