This seems to have some more clues: https://www.liquisearch.com/voyager_program/telemetry https://www.liquisearch.com/voyager_program/telemetry Although search

This seems to have some more clues: https://www.liquisearch.com/voyager_program/telemetry https://www.liquisearch.com/voyager_program/telemetry Although searching for the formats mostly yields copies of the same text on different websites