Abstract A new version of PETOOL (Parabolic Equation Toolbox) is introduced with various additional capabilities. PETOOL is an open-source and MATLAB-based software tool with a user-friendly graphical user interface (GUI) for the analysis and visualization of electromagnetic wave propagation over variable terrain and through arbitrary atmosphere. Four novel features of the second version are as follows: (i) Several evaporation duct models have been developed. (ii) Real atmosphere data have been included in the form of “Binary Universal Form for Representation (BUFR)” data developed by “World Meteorological Organization (WMO)”. (iii) Real terrain data have been incorporated into the toolbox in the form of “Digital Terrain Elevation Data (DTED)” developed by “National Imagery and Mapping Agency (NIMA)”. (iv) A special add-on has been developed to generate a 3D coverage map of propagation factor/loss on real terrain data. The toolbox can be used for research and/or educational purposes to analyze more realistic propagation scenarios in an easier and flexible manner. Program summary Program title: PETOOL v2.0 (Parabolic Equation Toolbox v2.0) CPC Library link to program files: http://dx.doi.org/10.17632/v8f42rn2zs.1 Licensing provisions: GNU General Public License 3 Programming language: MATLAB (MathWorks Inc.) R2019a. Partial Differential Toolbox, Curve Fitting Toolbox and Mapping Toolbox required. Journal Reference of previous version: O. Ozgun, G. Apaydin, M. Kuzuoglu, and L. Sevgi, PETOOL: MATLAB-based one-way and two-way split-step parabolic equation tool for radiowave propagation over variable terrain, Computer Physics Communications 182 (2011) 2638–2654. Does the new version supersede the previous version?: Yes Reasons for the new version: The new version of the toolbox has been enriched with several add-ons which allow the toolbox to make more realistic analyses with real terrain and atmospheric data. The toolbox has the ability to read real atmospheric data in the form of BUFR data and real terrain data in the form of DTED data. A wide range of evaporation duct models has been incorporated into the toolbox. A special add-on has been developed to generate a 3D coverage map of propagation factor/loss on real terrain data. Hence, the toolbox can be used to analyze more realistic propagation scenarios in an easier and flexible manner. Summary of revisions: (i) Several evaporation duct models have been included with real atmospheric data in BUFR format. (ii) Real terrain data in DTED format have been incorporated into the toolbox. (iii) A special add-on has been developed to generate a 3D coverage map of propagation factor/loss on real terrain data. Nature of problem: This program is designed with a user-friendly GUI for the analysis and visualization of radio-wave propagation over variable terrain on the Earth’s surface, and through homogeneous and inhomogeneous atmosphere by using real atmosphere and terrain data. It can easily model both horizontally- and vertically-varying atmospheric refraction (especially ducting) and multipath effects. Solution method: The program employs one-way and two-way Split-Step Parabolic Equation (SSPE) algorithms with a wide-angle propagator. The SSPE is an initial-value problem starting from a reference range (typically from an antenna), and marching out in range by obtaining the field along the vertical direction at each range step, through the use of step-by-step Fourier transformations. The two-way algorithm incorporates the backward-propagating waves into the standard one-way SSPE by utilizing an iterative forward–backward scheme for modeling multipath effects over a staircase-approximated terrain.

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PETOOL v2.0：具有蒸发管道模型和真实环境数据的抛物线方程工具箱

摘要 引入了具有各种附加功能的新版 PETOOL（抛物线方程工具箱）。PETOOL 是一种基于 MATLAB 的开源软件工具，具有用户友好的图形用户界面 (GUI)，用于分析和可视化可变地形和任意大气中的电磁波传播。第二个版本的四个新特点如下： (i) 已经开发了几个蒸发管道模型。(ii) 真实大气数据已以“世界气象组织（WMO）”开发的“二进制通用表示形式（BUFR）”数据的形式包含在内。(iii) 真实地形数据已以“国家影像与测绘局（NIMA）”开发的“数字地形高程数据（DTED）”的形式纳入工具箱。(iv) 开发了一个特殊的插件来生成真实地形数据上传播因子/损耗的 3D 覆盖图。该工具箱可用于研究和/或教育目的，以更简单灵活的方式分析更真实的传播场景。程序摘要 程序名称：PETOOL v2.0 (Parabolic Equation Toolbox v2.0) CPC 库程序文件链接：http://dx.doi.org/10.17632/v8f42rn2zs.1 许可条款：GNU 通用公共许可证 3 编程语言： MATLAB (MathWorks Inc.) R2019a。需要偏微分工具箱、曲线拟合工具箱和映射工具箱。先前版本的期刊参考：O. Ozgun、G. Apaydin、M. Kuzuoglu 和 L. Sevgi，PETOOL：基于 MATLAB 的单向和双向分步抛物线方程工具，用于可变地形上的无线电波传播，计算机物理通信 182 (2011) 2638-2654。新版本是否取代了以前的版本？：是 新版本的原因： 新版本的工具箱增加了几个附加组件，使工具箱能够对真实地形和大气数据进行更逼真的分析。该工具箱具有读取BUFR数据形式的真实大气数据和DTED数据形式的真实地形数据的能力。工具箱中包含了多种蒸发管道模型。已经开发了一个特殊的附加组件来生成真实地形数据上传播因子/损耗的 3D 覆盖图。因此，该工具箱可用于以更简单灵活的方式分析更真实的传播场景。修订摘要：(i) BUFR 格式的真实大气数据中包含了几个蒸发管道模型。(ii) DTED 格式的真实地形数据已纳入工具箱。(iii) 开发了一个特殊的附加组件来生成真实地形数据上传播因子/损耗的 3D 覆盖图。问题性质：该程序设计有一个用户友好的图形用户界面，用于分析和可视化无线电波在地球表面可变地形上的传播，以及使用真实大气和地形数据穿过均匀和非均匀大气的情况。它可以轻松模拟水平和垂直变化的大气折射（尤其是管道）和多径效应。求解方法：该程序采用单向和双向分步抛物线方程 (SSPE) 算法和广角传播器。SSPE 是一个初始值问题，从参考范围（通常来自天线）开始，并通过使用逐步傅立叶变换在每个距离步长处获得沿垂直方向的场，从而在范围内前进。双向算法通过利用迭代前向后向方案对阶梯近似地形上的多径效应进行建模，将向后传播的波合并到标准单向 SSPE 中。