电离层层析图像重建的改进算法

Improved Algorithm for Computerized Ionospheric Tomography

针对电离层层析图像重建数据不完全的关键问题.文中利用最速下降法对投影数据进行预处理,利用乘法代数重建算法进行图像重建.算法将迭代初始值的确定与图像优化重建过程统一起来,减少了初始值对重建结果的影响.数值计算及实测数据重建结果表明,该混合算法减少了投影数据不完全对重建结果的影响,有效提高了电离层层析成像质量.

In order to solve the key problem of incomplete data in Computerized Ionospheric Tomography ,the paper proposes an improved reconstruction algorithm .The choosing of initial guess and image optimization algorithm are integrated in the process of reconstruction . The improved algorithm can avoid the sensitivity of MART to the initial guess .The comparisons between the results by both algorithms indicate that the improved reconstruction algorithm can improve the quality of the reconstruction of CIT .