ERETCAD-Env: The 3-D Dynamic Simulation Software for On-Orbit Space Environment

The Extreme-environment Radiation Effect Technology Computer-Aided Design-Environment (ERETCAD-Env) software, compatible with a personal computer (PC) equipped with a discrete graphics card, is designed to dynamically simulate the complex phenomena of space environments and the motion state of on-orbit satellites to establish a model-based digital twin for any spacecraft in space. This article highlights the functions and features of ERETCAD-Env, which contain the main models of space environments, including but not limited to the neutral atmosphere, the plasma environment, the radiation environment, the geomagnetic field, and the solar electromagnetic radiation. Three illustrative simulation examples are presented: 1) simulation of multiple environments for multiple satellites on multiple orbits using multiple models: Demonstrates ERETCAD-Env’s capability to simulate diverse environments for multiple satellites concurrently, using a variety of models; 2) parallel computing technology: Discusses the utilization of parallel computing technology within the program, showcasing its efficiency and speed in calculating space environments; and 3) ability to calculate environment of constellation: Highlights ERETCAD-Env’s capability to calculate the environment for a satellite constellation, showcasing its versatility for designing commercial aerospace applications. As an efficient and valuable tool, ERETCAD-Env plays a crucial role in facilitating the reliable design of on-orbit spacecraft by considering the real space environment. This is particularly significant for the commercial aerospace industry where accurate understanding and simulation of space conditions are paramount.