Parabolic Equation Method for Loran-C ASF Prediction Over Irregular Terrain
Parabolic Equation Method for Loran-C ASF Prediction Over Irregular Terrain
复制标题
不规则地形Loran-C ASF预测的脉冲抛物方程法
DOI：
10.1109/lawp.2015.2471079
复制
发表时间：
2016
影响因子：
4.2
通讯作者：
Zhou Li-Li
中科院分区：
文献类型：
--
作者：
Wang Dan-Dan;Xi Xiao-Li;Pu Yu-Rong;Liu Jang-Fan;Zhou Li-Li
我们以前介绍了一个有效的抛物方程（PE）方法来解决罗兰-C附加的二次因子（ASF）在不规则的地形存在。然而，传统的PE分析，一个窄带罗兰C源的近似为100 kHz的正弦源的基础上，是不够的现实罗兰C ASF预测。本文采用脉冲PE方法进一步提高了罗兰C ASF在不规则地形上的预报精度。该方法的主要思想是将时域的波传播问题转化为频域的波传播问题，而频域的波传播问题可以用传统的PE方法求解。数值算例验证了该方法的准确性和有效性。
We previously introduced an efficient parabolic equation (PE) method to solve the Loran-C additional secondary factors (ASFs) in the presence of irregular terrain. However, traditional PE analysis, based on the approximation of a narrowband Loran-C source to a 100 kHz sinusoidal source, is not sufficient for realistic Loran-C ASF prediction. In this letter, a pulse PE method is employed to further improve the accuracy of the Loran-C ASF prediction over irregular terrain. The main idea of this approach is that it converts the time-domain wave propagation problems to the frequency-domain wave propagation ones, which can be solved by the traditional PE solution. Numerical examples illustrate the accuracy and effectiveness of the proposed method.