// ORBITAL LOGISTICS AND PROPULSION TERM
Command
An instruction sent from a ground station to a spacecraft to perform a specific action, such as firing thrusters, deploying an antenna, or collecting data.
TECHNICAL DEFINITION
A command, in space operations, is a discrete digital instruction or sequence of instructions transmitted via radio frequency uplink from a ground station to a spacecraft, initiating a specific action, configuration change, or operational sequence within the onboard systems.
BACKGROUND
Axiom Space, Inc., is an American privately funded space infrastructure developer headquartered in Houston, Texas.
READ MORE ON WIKIPEDIASYNONYMS & ALIASES
- Instruction
- Directive
- Order
- Uplink command
USAGE NOTE
Operators send commands to adjust the satellite's orientation.
DEVELOPERS
Organizations developing technology related to Command.
As a primary space agency, NASA develops and operates sophisticated command and control systems for its various missions, including spacecraft, rovers, and human spaceflight. Its mission control centers and the Deep Space Network are critical for commanding distant assets.
SpaceX designs, manufactures, and launches advanced rockets and spacecraft. It operates extensive command and control infrastructure for its Falcon launch vehicles, Starship development, and the large Starlink satellite constellation, managing thousands of satellites in orbit.
A major aerospace and defense company, Lockheed Martin develops and integrates complex command and control systems for satellites, missiles, and other space-based assets, providing critical capabilities for both government and commercial clients.
Northrop Grumman delivers command, control, communications, computers, intelligence, surveillance, and reconnaissance (C4ISR) systems, including advanced ground and space-based command and control solutions for various defense and space missions.
Through its European Space Operations Centre (ESOC), ESA is responsible for the command and control of numerous European space missions, including Earth observation satellites, planetary probes, and space science missions.
Airbus Defence and Space is a leading developer and manufacturer of satellites and space systems. It also provides ground segment solutions, including sophisticated command and control systems for operating and managing its own and third-party spacecraft.
Maxar Technologies specializes in Earth observation and geospatial intelligence. It develops and operates advanced satellites and associated ground systems that enable precise command and tasking of its high-resolution imaging spacecraft.
Rocket Lab designs and manufactures the Electron launch vehicle and Photon spacecraft. The company operates its own launch control centers and mission operations for commanding its rockets during flight and managing its orbital spacecraft.
KSAT operates a global network of ground stations that provide critical services for satellite command and control. They offer comprehensive ground segment solutions, enabling operators to send commands and receive telemetry data from their spacecraft.