首页 >  2001, Vol. 5, Issue (1) : 22-28

摘要

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引用本文:

DOI:

10.11834/jrs.20010105

收稿日期:

2000-02-02

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电离层CT数据采集和图像重建
1.武汉大学 物理与电子信息科学学院,湖北 武汉 430072;2.Department of ECE,University of Illionis at Urbana-Champaign,IL 61801 USA
摘要:

介绍低纬电离层CT实验所使用的数据自动采集系统并提出一种电离层CT算法。在数据采集过程中引入了GPS标准时间;重建算法的特点是利用差分多普勒频率数据避免了相位积分常数的计算,提高了对较弱的电离层扰动和不规则结构的检测能力。数值模拟反演结果表明了该算法对电离层CT重建的有效性,并给出有关实测数据的重建结果。

Data Acquisition System and Image Reconstruction for Computerized Ionospheric Tomography
Abstract:

This paper presents the design and operational features of the automatic data acquisition system for the lowlatitude ionospheric tomography along the 120oE meridian. An improved reconstruction algorithm of computerized ionospheric tomography is also proposed. The algorithm avoids the calculation of integral phase constant by exploiting the differential Doppler frequency data£?thus its capability of detecting weaker ionospheric irregularities has been enhanced. Both numerical simulated examples and the reconstructed results from observed data show that the new algorithm works reasonably and effectively with ionospheric CT problems.

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