openc3

NASA Operational Simulator for Space Systems

useful tool to create gem files. Put inside of folder with json file, edit json_data = JSON.parse(File.read('gem_01.json')) with the json file name. Run the script: ruby build_plugin.rb. Navigate into the folder. Rebuild the gem: rake package

Satellite GNC flight software in C++17 with a CCSDS/PUS ground segment. Portable flight core (no heap, no exceptions, no OS dependency), rate-group scheduler, and a single mission dictionary that generates the flight code, the OpenC3 COSMOS database and the ICD.

An open-source telemetry bridge and CI regression runner for OpenC3 COSMOS v5. Decommunicates JSON-RPC telemetry streams into typed Python and Go structs with automated limit-state assertions and declarative YAML acceptance tests, allowing ground teams to verify satellite telemetry pipelines in CI without physical hardware.