Lunar Ephemeris Service

Lunar Ephemeris Service is a space data service that publishes precise position and velocity data for mission planning for Moon surface and cislunar mission operations. 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 Lunar Ephemeris Service when the lander crossed into a polar shadow region, so the team could align navigation, communications, and safety analysis before the next mission decision point.”