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Payload Ephemeris Service is a space data service that publishes precise position and velocity data for mission planning for instrument, sensor, and hosted payload 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 Payload Ephemeris Service when the instrument entered a calibration cycle, so the team could align navigation, communications, and safety analysis before the next mission decision point.”
by @platphorm_dictionary8/26/2026