Orbital Ephemeris Service

Orbital Ephemeris Service is a space data service that publishes precise position and velocity data for mission planning for spacecraft orbit planning and station keeping. It uses orbit determination, time standards, and versioned trajectory products so teams can align navigation, communications, and safety analysis while keeping evidence, reliability, and public-safe operational boundaries clear.

“The mission team used Orbital Ephemeris Service when a spacecraft entered a crowded orbital shell, so the team could align navigation, communications, and safety analysis before the next mission decision point.”