A mission control center is a facility that manages space flights, usually from the point of launch until landing or the end of the mission. It is part of the ground segment of spacecraft operations. A staff of flight controllers and other support personnel monitor all aspects of the mission using telemetry, and send commands to the vehicle using ground stations. Personnel supporting the mission from an MCC can include representatives of the attitude control system, power, propulsion, thermal, attitude dynamics, orbital operations and other subsystem disciplines. The training for these missions usually falls under the responsibility of the flight controllers, typically including extensive rehearsals in the MCC.
Image: Expedition 55 Soyuz Docking (NHQ201803230003)
Image: ISS Flight Control Room 2006
A ground segment consists of all the ground-based elements of a space system used by operators and support personnel, as opposed to the space segment and user segment. The ground segment enables management of a spacecraft, and distribution of payload data and telemetry among interested parties on the ground. The primary elements of a ground segment are:Ground stations, which provide radio interfaces with spacecraft
Mission control centers, from which spacecraft are managed
Remote terminals, used by support personnel
Spacecraft integration and test facilities
Launch facilities
Ground networks, which allow for communication between the other ground elements
Radio dishes at an Embratel earth station in Tanguá, Brazil
Control center at NASA's Jet Propulsion Laboratory
Antenna belonging to the Deep Space Network
Space Telescope Operations Control Center at Goddard Space Flight Center, during servicing of the Hubble Space Telescope