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Dataset
Open Access
Creative Commons Attribution 4.0 International License
Level 0 data for: A Microwave Scattering Database of Oriented Ice and Snow Particles: Supporting Habit-Dependent Growth Models and Radar Applications
Leonie von Terzi1
1Ludwig-Maximilians-Universität München
First published:
Sept. 2, 2025
DOI: 10.57970/cgtek-fen77
Keywords:
discrete-dipole approximation
ice particle scattering properties
radar forward simulation

von Terzi, L. (2025): Level 0 data for: A Microwave Scattering Database of Oriented Ice and Snow Particles: Supporting Habit-Dependent Growth Models and Radar Applications. LMU Munich, Faculty of Physics. (Dataset). DOI: 10.57970/cgtek-fen77

wget and curl are the two standard tools that are available on most Linux and macOS computers. wget contains a feature for downloading a list of files: 
wget -x -nH -i 'https://dmz-sv-irods1.server.physik.lmu.de/cgtek-fen77/?list'
curl is missing a feature like that, but the same functionality can be created by combining curl and xargs: 
curl 'https://dmz-sv-irods1.server.physik.lmu.de/cgtek-fen77/?list' | xargs -I URL -n1 bash -c 'curl --create-dirs -o ${1:43} ${1}' -- URL
Abstract
This publication contains a new database of radar-relevant optical properties for a wide range of ice crystal shapes and aggregates, computed using the discrete dipole approximation (DDA) at 5.6, 9.6, 35.6, and 94 GHz. The database includes over 2,600 individual crystals and 450 aggregates with varying degrees of riming and morphology, and provides data at multiple levels of processing for use in forward operators and radar simulators. Published here is the level 0 data, which contains the raw output from the DDA calculations including the Mueller and Amplitude matrices at all scattering directions for each particle, along with log-files documenting the simulation settings. For further processing levels, the user is referred to https://doi.org/10.5281/zenodo.16792943.
README.md

Once untared, the scattering database is structured as followed: {particlename}/{radarfrequency}/{radarelevationangle}/{radarazimuthangle}/ Inside each folder are the results summarized in the Mueller matrix, Amplitude matrix, a log file which describes the DDA setup, as well as the cross section in x and y directions.

The shapefiles of all particles (the 3D representation of the particles used for the forward simulations):

shapefiles_{particle}.tar.gz

Files