The NASA Deep Space Network (DSN) is a worldwide network of spacecraft communication ground segment facilities, located in the United States (California), Spain (Madrid), and Australia (Canberra), that supports NASA's interplanetary spacecraft missions. It also performs radio and radar astronomy observations for the exploration of the Solar System and the universe, and supports selected Earth-orbiting missions. DSN is part of the NASA Jet Propulsion Laboratory (JPL).
Onizuka Air Force Station or Onizuka AFS was a United States Air Force installation in Sunnyvale, California, at the intersection of State Route 237 and North Mathilda Avenue. It operated from 1960 to 2010.
Pituffik Space Base, formerly Thule Air Base, is the United States Space Force's northernmost base, and the northernmost installation of the U.S. Armed Forces, located 750 mi (1,210 km) north of the Arctic Circle and 947 mi (1,524 km) from the North Pole on the northwest coast of the island of Greenland. Pituffik's Arctic environment includes icebergs in North Star Bay, two islands, a polar ice sheet, and Wolstenholme Fjord – the only place on Earth where four active glaciers join. The base is home to a substantial portion of the global network of missile warning sensors of Space Delta 4, and space surveillance and space control sensors of Space Delta 2, providing space awareness and advanced missile detection capabilities to North American Aerospace Defense Command (NORAD), the United States Space Force, and joint partners.
A ground station, Earth station, or Earth terminal is a terrestrial radio station designed for extraplanetary telecommunication with spacecraft, or reception of radio waves from astronomical radio sources. Ground stations may be located either on the surface of the Earth, or in its atmosphere. Earth stations communicate with spacecraft by transmitting and receiving radio waves in the super high frequency (SHF) or extremely high frequency (EHF) bands. When a ground station successfully transmits radio waves to a spacecraft, it establishes a telecommunications link. A principal telecommunications device of the ground station is the parabolic antenna.
The United States Air Force's Air Force Satellite Control Facility (AFSCF) was a space command and control unit located at Onizuka AFS, California. It has the distinction of being heavily involved in the world's first reconnaissance satellite program, CORONA. Due to geological hazards, and the terrorism threat from its proximity to a major transportation link, the facility's command and control functions were moved to Schriever AFB, Colorado.
The United States Space Surveillance Network (SSN) detects, tracks, catalogs and identifies artificial objects orbiting Earth, e.g. active/inactive satellites, spent rocket bodies, or fragmentation debris. The system is the responsibility of United States Space Command and operated by the United States Space Force and its functions are:
New Boston Space Force Station (BOSS) is a United States Space Force facility located in Hillsborough County in south central New Hampshire. It was transferred from the United States Air Force to the Space Force in the summer of 2020.
The 22d Space Operations Squadron is a satellite control unit of the United States Space Force. It is part of Space Delta 6 and is located at Schriever Space Force Base, Colorado. Prior to July 2020 it was part of the 50th Network Operations Group, itself a part of the 50th Space Wing.
The Indian Space Research Organisation (ISRO), over the years, has established a comprehensive global network of ground stations to provide Telemetry, Tracking and Command (TTC) support to satellite and launch vehicle missions. These facilities are grouped under ISRO Telemetry, Tracking and Command Network (ISTRAC) with its headquarters at Bangalore, India.
The 6th Space Operations Squadron is an Air Force Reserve satellite command and control squadron located at Schriever Space Force Base, Colorado. The squadron is a backup to NOAA for Defense Meteorological Satellite Program operations.
The 21st Space Operations Squadron is a satellite control unit of the Space Delta 6 of the United States Space Force, located at Vandenberg Space Force Base, California. Prior to July 2020, it was part of the 50th Network Operations Group. It operated Onizuka Air Force Station from its formation in 1991 until the closure of the station in 2010.
The United States Air Force's 750th Space Group was a space operations unit located at Onizuka Air Force Station, California. its predecessor was formed on 1 October 1987; it assumed the designation of the 750th Space Group on 30 January 1992; and it was inactivated on 25 June 1999.
The 1st Space Operations Squadron is a United States Space Force unit responsible for space-based space domain awareness. Located at Schriever Space Force Base, Colorado, the squadron operates the Space Based Space Surveillance system, the Advanced Technology Risk Reduction system, the Operationally Responsive Space-5 satellite, and the Geosynchronous Space Situational Awareness Program.
The Manned Space Flight Network was a set of tracking stations built to support the American Mercury, Gemini, Apollo, and Skylab space programs.
The 19th Space Operations Squadron is an Air Force Reserve space operations unit, located at Schriever Air Force Base, Colorado.
The 23rd Space Operations Squadron is a satellite control unit of the United States Space Force. It is part of Space Delta 6 and is located at New Boston Space Force Station, New Hampshire. Prior to July 2020, part of the 50th Network Operations Group, itself a part of the 50th Space Wing.
Thule Site J (J-Site) is a United States Space Force (USSF) radar station in Greenland near Pituffik Space Base for missile warning and spacecraft tracking. The northernmost station of the Solid State Phased Array Radar System, the military installation was built as the 1st site of the RCA 474L Ballistic Missile Early Warning System and had 5 of 12 BMEWS radars. The station has the following structures:
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:
The Combined Force Space Component Command (CFSCC) was a U.S.-led multinational subordinate command of United States Space Command. It was responsible for tactical control of American and multinational space forces. The CFSCC's mission was to "plan, integrate, conduct, and assess global space operations in order to deliver combat relevant space capabilities to Combatant Commanders, Coalition partners, the Joint Force, and the Nation." It was established on 29 August 2019.
Space Delta 6 is a United States Space Force unit which assures access to space through the $6.8 billion Satellite Control Network and defensive cyberspace capabilities for space mission systems.
