Application of hybrid regularization method for tomographic reconstruction of midlatitude ionospheric electron density

被引：33

作者：

Yao, Yibin ^{[1
,2
]}

Tang, Jun ^{[1
]}

Kong, Jian ^{[1
,3
]}

Zhang, Liang ^{[1
]}

Zhang, Shun ^{[1
]}

机构：

[1] Wuhan Univ, Sch Geodesy & Geomat, Wuhan 430079, Peoples R China

[2] Wuhan Univ, Minist Educ, Key Lab Geospace Environm & Geodesy, Wuhan 430079, Peoples R China

[3] Ohio State Univ, Sch Earth Sci, Columbus, OH 43210 USA

来源：

ADVANCES IN SPACE RESEARCH | 2013年 / 52卷 / 12期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

Ionospheric tomography; Ill-posed inverse problem; Tikhonov regularization; Total variation regularization; Hybrid regularization; RADIO TOMOGRAPHY; COMPUTERIZED-TOMOGRAPHY; GPS; ALGORITHM; NETWORK;

D O I：

10.1016/j.asr.2013.09.030

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

Reconstructing ionospheric electron density (IED) is an ill-posed inverse problem, with classical Tikhonov regularization tending to smooth IED structures. By contrast, total variation (TV) regularization effectively resists noise and preserves discontinuities of the IED. In this paper, we regularize the inverse problem by incorporating both Tikhonov and TV regularization. A specific formulation of the proposed method, called hybrid regularization, is introduced and investigated. The method is then tested using simulated data for the actual positions of the GPS satellites and ground receivers, and also applied to the analysis of real observation data under quiescent and disturbed ionospheric conditions. Experiments demonstrate the effectiveness, and illustrate the validity and reliability of the proposed method. (C) 2013 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：2215 / 2225

页数：11

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