CRPropa is a public astrophysical simulation framework for propagating extraterrestrial ultra-high energy particles. https://crpropa.github.io/CRPropa3/

The Irregular Terrain Model (ITM)

We provide visible light communication (vlc) module that is implemented using NS3 to simulate large-scale vlc.Please refer to the doc directory for more details.

U.S. reference implementation of Recommendation ITU-R P.528 providing propagation path loss predictions for aeronautical mobile and radionavigation services using the VHF, UHF, and SHF bands

The Extended Hata (eHata) Urban Propagation Model

Low Frequency / Medium Frequency (LF/MF) Propagation Model

This project introduces a practical high-performance stand-alone and OS independent Ionospheric Channel Simulator. Full open source documentation is available here.

Windows implementation of SPLAT (Signal Propagation, Loss, And Terrain), a C++ open source application for Linux that models the propagation of radio waves over terrain. Results should align with SPLAT v1.4.2, though I haven't tested it extensively.

C++ Error Propagation Double Class

Comparing approaches for community detection using OpenMP-based LabelRank algorithm.

Single-threaded CPU-based Raghavan Albert Kumara (RAK) algorithm, aka Label propagation Algorithm (LPA), for community detection.

Ham Radio weather station Propagation indicator - reading from https://www.hamqsl.com/solar.html and indicating propagation condition into RGB LED and Oled. Conection via eth or WIFI based on ESP8266 or ESP32. Please help me with development if You see some potential.

A software tool for fitting an astrophysical cosmic ray source model to combined spectrum and composition data