Data and Code for: Damped Kinetic Alfven Waves in Earth's Magnetosheath

Data and Scripts for: Damped Kinetic Alfven Waves in Earth's MagnetosheathAuthors: Mani & Hemam, et al. (2025)DOI: 10.5281/zenodo.17847125 OVERVIEWThis repository contains the numerical simulation data and Python analysis scripts used to generate the figures in the associated manuscript. The code reproduces the comparison between the undamped and Landau-damped Kinetic Alfven Wave (KAW) turbulence and validates the results against MMS spacecraft observations. CONTENTS: 1. Simulation Data (.zip files) These .zip archives contain the .npz output data from the undamped and Landau-damped simulations run up to t=100. - undamped100.npz : Output data for the undamped simulation run up to t=100. - damped100.npz : Output data for the Landau-damped simulation run up to t=100. 2. Simulation Plotting Scripts (Python) These scripts read the .npz files above to visualize the turbulence properties. - energy_decay.py : Plots the total magnetic energy vs. time to quantify dissipation (Figure 1). - 2D_morphology.py : Generates 2D spatial maps of the magnetic field structures (Figure 2). - power_spectra.py : Computes and plots the averaged power spectra with spectral slopes (Figure 3). - fourier_stick.py : Visualizes the evolution of specific Fourier modes over time (Figure 4). 3. MMS Observation Scripts (Python) These scripts use PySPEDAS to download and analyze spacecraft data for plotting. - MMS_psd.ipynb: Loads MMS1 burst-mode data and plots the power spectral density (PSD) (Figure 7). - combined_bfield.ipynb : Loads MMS1 and plots the time-series fluctuations of the simulation vs. MMS data (Figure 6). - MMS_KAW_analysis.ipynb: plots the electromagnetic fields and KAW ratios (Figure 5). INSTRUCTIONS:1. Ensure you have Python 3 installed with the following libraries: numpy, matplotlib, scipy, pyspedas, pytplot2. Place all .py scripts and .npz data files in the same directory.3. Run any script to generate the corresponding PDF figure (e.g., python energy_decay.py). *Note: Try to run the MMS scripts using jupyter notebook, it will automatically attempt to download the required data files from the NASA CDAWeb if they are not present. CITATION:If you use this code or data for your own research or reproduction, please acknowledge the source by citing the associated manuscript and this Zenodo repository:Chettri, M. K., et al. (2025). "Damped Kinetic Alfvén Waves in Earth's Magnetosheath". DOI: 10.5281/zenodo.17847125