SGP4.gl provides a GPU-accelerated three-dimensional satellite visualization using SGP4, CesiumJS, and Next.js.
Sgp4gl Demo
This project demonstrates real-time three-dimensional satellite visualization in a browser using SGP4GL, CesiumJS, and Next.js.
About Sgp4gl Demo
Sgp4gl Demo is an open source repository that shows how to render satellite orbits in a web browser in three dimensions and in real time. It combines SGP4GL for web-based ephemeris propagation, CesiumJS for the 3D globe, and Next.js 14 for the application framework. The project is described as a framework for rendering satellite orbits.
The repository includes install, development, and production build commands. Cesium is set up to use an external tile provider, which requires a Cesium token and a tile provider URL in an environment file. Integrating Cesium with Next.js can introduce build and runtime problems, and the repository is configured for CesiumJS, Next.js 14 and later, and Vercel deployment.
Key features
- Real-time 3D rendering of satellite orbits in a web browser
- Web-based ephemeris propagation using SGP4GL
- CesiumJS globe display for satellite visualization
- Environment variables for a Cesium token and external tile provider URL
- CopyWebpackPlugin setup to serve required Cesium static assets
- Live demo hosted at sgp4gl-demo.vercel.app
Best for: Developers and students who want a working example of combining satellite orbit propagation with CesiumJS in a Next.js project.
Good for
- Released under the MIT license, which permits use and adaptation
- Includes install, development, and production build commands
- A live demo is available for viewing the visualization
Watch out for
- Integrating Cesium with Next.js can introduce build and runtime challenges
- Requires a Cesium token and a tile provider URL set in .env.local
- Configuration is stated for Next.js 14 and later and Vercel deployment only
Sgp4gl Demo at a glance
- Category
- Education & Learning › Space & Astronomy
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Sgp4gl Demo FAQ
What settings are needed to run the project?
Set NEXT_PUBLIC_CESIUM_TOKEN and NEXT_PUBLIC_TILES_URL in a .env.local file. The repository says Cesium tokens can be obtained from cesium.com.
What license does the project use?
The project is licensed under MIT, which the repository describes as free to use and adapt.
Is there a running version to view?
The repository lists a live demo at sgp4gl-demo.vercel.app.
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