%0 Journal Article
%T RECONSTRUCTION FORMULA OF TIME-DEPENDENT 3-D COMPUTERIZED IONOSPHERIC TOMOGRAPHY<br>时变三维电离层层析成像重建公式
%A XU JISHENG
%A <br>徐继生
%J 地球物理学报
%D 2003
%I 
%X This paper illuminates the mathematical foundation of time-dependent three-dimensional computerized ionospheric tomography (CIT) for reconstructing ionospheric electron density (Ne) from ground-based GPS beacon measurements. After simplifying the relation between Ne and time, the formula of 3-D parallel-beam tomography is theoretically deduced and proved to be the same as the 2-D CIT inversion formula derived by K.C. Yeh when it is applied to 2-D cases. Furthermore, this paper investigates the effects of limited view angle and finite receiver aperture on recovered images. Specifically, the response to an impulse source function with the established 3-D parallel-beam reconstruction formula under these non-idealized conditions is numerically computed. The results indicate the feasibility of time-dependent three-dimensional CIT to reconstruct (Ne) from ground-based GPS beacon measurements.
%K Ionosphere
%K Time-dependent
%K Three-dimensional
%K CT
%K GPS
%K Beacon<br>GPS
%K 全球定位系统
%K 电离层传播
%K 无线电波
%K 时变三维层析成像
%K 图像重建
%K 信标观测
%K 电子密度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=1E44AE713D8A6DE0&jid=14DC41C59CBF6770055A7D610D53AE46&aid=CF7ED8DF9C35C4AA&yid=D43C4A19B2EE3C0A&vid=D997634CFE9B6321&iid=E158A972A605785F&sid=BEE722AB5028E81F&eid=A48DE16C07AAAB06&journal_id=0001-5733&journal_name=地球物理学报&referenced_num=5&reference_num=10