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It can also calculate and display the station's position in real time.\n\nThe app periodically fetches orbital information about ISS from [celestrak.org](https://celestrak.org). The [PyEphem](https://github.com/brandon-rhodes/pyephem) library is then used to predict future passes based on this data and [Satellite.js](https://github.com/shashwatak/satellite-js) is used for calculating the current position.\n\n## Dependencies\n- [Node.js 18.x](https://nodejs.org)\n- [Redis server](https://redis.io) - used as a cache for API requests.\n- [Python 3](https://www.python.org)\n- [PyEphem](https://github.com/brandon-rhodes/pyephem)\n\nOn Debian GNU/Linux they can be quickly installed by running:\n```\nsudo apt install nodejs npm redis python3-ephem\n```\n\n## Build from source\n```\nnpm install\nnpm run build\n```\n\nFor a production build use `npm run build-prod`.\n\n# Run\nMake sure redis-server is running (otherwise the app will exit with an error) and run `node app.js` to start the app. Then navigate to `http://localhost:3000`.\n\nFor development you can instead run `npx nodemon app.js`. This will restart the backend automatically on changes.\n\nLive version is at: [issviewer.com](https://issviewer.com)","funding_links":[],"categories":[],"sub_categories":[],"project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fpkrasicki%2Fissviewer","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fpkrasicki%2Fissviewer","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fpkrasicki%2Fissviewer/lists"}