摘要
大地电导率是目前影响地波传播时延修正量计算精度的关键因素之一。将地波传播时延计算方法中的Millington经验公式作为前向算法,以传播时延修正量的理论预测结果与实测结果误差最小为优化目标,将大地电导率反演问题转化为优化问题,并采用遗传算法对传播路径上的大地电导率进行反演。通过对部分试验区域的仿真实验,证实了这种反演方法的可行性以及所反演电导率的可靠性。
The earth conductivity is a key factor affecting the calculation accuracy of the time-delay correction on ground-wave propagation.This paper presents an inversion method to calculate the earth conductivity from the propagation time delay.As a forward algorithm,the Millington empirical formula is employed to calculate the propagation time-delay,and then the genetic algorithm(GA) is used to calculate the earth conductivities by solving an optimization problem targeting to a minimum error between the calculated time-delay and the measured value.The inversed earth conductivity is further verified by the simulation in some experimental regions.
出处
《电波科学学报》
EI
CSCD
北大核心
2010年第2期378-382,共5页
Chinese Journal of Radio Science
基金
国家自然科学基金资助项目(No.60671035)
陕西省重点学科建设专项资金资助项目