Full documentation appears in the docs folder.

The Seismic and Radar Toolbox (SeidarT) is a collaboration between researchers at the Universities of Maine and Washington to provide an open source platform for forward modeling mechanical and electromagnetic wave propagation. The major objective of the project is to easily and quickly implement isotropic and anisotropic complex geometries and/or velocity structures to develop prior constraints for - not limited too - investigating, estimating, and imaging englacial ice structure, sub-glacial boundary conditions on the sub-regional scale. Larger problems would require the curvature of the Earth to be taken into consideration, but many glacier seismic and radar experiments do not expand into regional parameter estimation and velocity modeling.

Much of the Staggered Grid FDTD code has been adopted from the SEISMIC_CPML software provided by Computational Infrastucture for Geophysics (CIG) <https://geodynamics.org/cig/software/>. Further details to the backend numerical code can be found in the [References](#references) section below.

The dynamical programming language of Python3 is used as a command line interface to run the more computationally extensive modeling schemes in Fortran. There are a number of ways to install this software depending on your desired level of control over the process. Most users should be fine with the "automatic installation" in the [section below](#auto-install).

SeidarT package binaries are publicly availble on the PyPi repository <https://pypi.org/project/seidart/> and source code <https://github.com/UMainedynamics/SeidarT> can be found on GitHub.

For Windows users, see the VM setup. Unix/Linux users can download the tarball here <https://github.com/UMainedynamics/SeidarT/blob/main/install.tar.xz?raw=1>.

Extract the install directory from the install.tar.gz which includes an install script, full_install.sh, and the seidart-environment.yml. It's not necessary to know or do much more than execute a few command line entries via a bash terminal or powershell terminal. The install script checks for and installs if necessary the Anaconda/Miniconda package manager. A virtual environment is created to avoid causing system incompatibilities and complicated software dependencies. If Anaconda/Miniconda is not defined in your 'PATH' variable than it will be installed using the default install location. After installing the Conda package, the seidart environment is built using pre-defined dependencies in a YAML (Yet Another Markup Language) file. Both Bash executables and Python modules are built during install. In order to use either, the environment must be active. This can be easily done from the Bash command line interface (CLI) using the command ` conda activate seidart`

Documentation for managing conda environments with Miniconda or Anaconda can be found here <https://conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html>. The full Anaconda release has a GUI called Navigator for managing environments. This can be found here <https://docs.anaconda.com/free/navigator/tutorials/manage-environments/>.

There are a few different options for virtual machine software, but VirtualBox is a robust and free VM management software that can be installed on Windows, MacOS, and Linux. Follow the directions to download and install the software from the website <https://www.virtualbox.org/>.

There are a couple options for creating a virtual machine for SeidarT. The simplest is to download the files <https://drive.google.com/drive/folders/1zVzlKLug95wfy6NCwYGtsbD_cJK8CW1S?usp=drive_link> (~4GB) for the VM clone from Google Drive. The VM clone requires 4 GB of RAM. Currently, the clone is setup as 5 GB of hard disk space to keep it relatively lightweight so it is recommended that an external drive be used for creating and building models. It is common for a few GB of hard disk space to be used up when running the models which can easily be recovered by deleting the .dat outputs.

After installing VirtualBox and downloading the VM clone files, launch the VirtualBox software. In the VM manager, click on the Add button and you will be prompted to choose a .vbox file. Navigate to the directory with the VM clone and select it. This will launch a Debian Linux clone with in an Xfce desktop environment. The username and password are seidart which can be changed. Here <https://reintech.io/blog/managing-users-groups-debian-12> is an example of how to do so. To get started, open up a Bash terminal and activate the conda environment (see above) and start a Python session by entering into the command line:

` python`

For users that would like to build a VM with more control, different preferences (i.e. hard disk space), for a different flavor of Linux, or using a different VM manager you will need to download the .iso file for the desired Linux then create a new VM. This will prompt you with the setup parameters. Following setup, you can launch your VM and open up a terminal. From here you can follow the Auto Installation (above) or Manual Installation (below) directions.

The full repo can be found on GitHub and is hosted on PyPi. SeidarT has been tested on Python 3.11 and is not yet supported with Python 3.12. For users that prefer building virtual environments with Anaconda, the install folder contains the seidart-environment.yml or it can be found in the root directory of the GitHub repo. To clone the directory, open a bash terminal and enter the command: ` git clone git@github.com:UMainedynamics/SeidarT.git`

Change directories into the install folder

` cd SeidarT/install`

Create and build the seidart environment ` conda env create -f seidart-environment.yml This will install all dependencies and the latest *seidart* version found on PyPi. For users who prefer more control in their installation, their is a small list of dependencies that must be met. These are: *gcc*>10, *gfortran*, *ghostscript*, *imagemagick*, *numpy*, *pandas*, *matplotlib*, *scipy*, *glob2*, *pyevtk*, *mplstereonet*. Following install of all dependencies, pip install seidart` will pull the latest version and install the package from PyPi.

SeidarT was tested and developed on a quad core 5th gen i7 processor with 16 Gb of RAM without any burden on the system so a typical modern laptop is sufficient for many application. When running models with large domains or a high number of time steps, the computational load is obviously increased, however the storage requirements become more significant. It can be easy to fill up 10's of Gb of storage, but an external drive can resolve that problem. The Apple M-chips may have compatability issues with particular types of software and Python packages, but we have maintained a relatively simple design along with leveraging some of the most commonly used Python packages which should help to mitigate any issues with computing on an M-chip.

All of the development was carried out on a Linux operating system and limited to Debian, Ubuntu, Solus 2, and Fedora. No compatibility issues between Linux flavors arose. The binaries are built on Github Actions for Windows 10 and 11 (latest), MacOS 13 and 14 (latest), and most flavors of Linux. Cross-platform usability is one of the core tenets in the development of the software and needs to be maintained in future development.