01Definition
Telemetry, tracking, and command (TT&C) is the system that monitors a spacecraft, tracks its position, and sends it commands.
TT&C is how operators know the state of a satellite and control it. Because it carries the commands that fly the spacecraft, the TT&C path is a high-value target and a priority to secure.
02Related terms
- Ground segment: The ground segment is the part of a space system on Earth: the ground stations, networks, and control systems that command satellites and receive their data.
- Link segment: The link segment is the set of communication links that connect the ground and the space segments of a space system.
03Learn more
See space cybersecurity, operations and resilience for how these terms fit together, or browse the full glossary.