The AN/FPS-133 Air Force Space Surveillance System, colloquially known as the Space Fence, was a U.S. government multistatic radar system built to detect orbital objects passing over America. It is a component of the U.S. space surveillance network, and according to the U.S. Navy was able to detect basketball sized objects at heights up to 30,000 km (19,000 mi).
The United States Armed Forces are the military forces of the United States. The armed forces consist of six service branches: the Army, Marine Corps, Navy, Air Force, Space Force, and Coast Guard. All six armed services are among the eight uniformed services of the United States.
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.
Buckley Space Force Base is a United States Space Force base in Aurora, Colorado named after United States Army Air Service First Lieutenant John Harold Buckley. The base is run by Space Base Delta 2, with major units including the U.S. Space Force's Space Delta 4, the Colorado Air National Guard's 140th Wing, the Denver Naval Operations Support Center, and the National Reconnaissance Office's Aerospace Data Facility-Colorado.
The 50th Wing is an inactive United States Air Force wing.
A space command is a military organization with responsibility for space operations and warfare. A space command is typically a joint organization or organized within a larger military branch and is distinct from a fully independent space force. The world's first space command, the United States' Air Force Space Command was established in 1982 and later became the United States Space Force in 2019.
The 21st Wing is an inactive wing of the United States Air Force.
The Naval Information Warfare Systems Command (NAVWAR), based in San Diego, California is one of six SYSCOM Echelon II organizations within the United States Navy and is the Navy's technical authority and acquisition command for C4ISR, business information technology and space systems. Echelon II means that the organization reports to someone who, in turn, reports directly to the Chief of Naval Operations on the military side. From a civilian perspective, NAVWAR reports to the Assistant Secretary of the Navy (RDA). The command was formerly known as Space and Naval Warfare Systems Command (SPAWAR) and was renamed in June 2019 to better align its identity with its mission.
The 20th Space Surveillance Squadron is a Space Delta 2 unit located at Eglin Air Force Base, Florida with the mission to execute multiplatform, tactical space warfighting domain characterization, recognition, and responsiveness to achieve 21st Space Wing and United States Space Command intent. The unit, formerly designated the 20th Space Control Squadron, was renamed on 25 March 2022.
The structure of the United States Navy consists of four main bodies: the Office of the Secretary of the Navy, the Office of the Chief of Naval Operations, the operating forces, and the Shore Establishment.
Space Systems Command (SSC) is the United States Space Force's space development, acquisition, launch, and logistics field command. It is headquartered at Los Angeles Air Force Base, California and manages the United States' space launch ranges.
The 16th Electromagnetic Warfare Squadron is an active United States Space Force unit, stationed at Peterson Space Force Base, Colorado as part of the Space Delta 3. The squadron protects critical satellite communication links to detect, characterize, geolocate and report sources of electromagnetic interference on US military and commercial satellites. The squadron also provides combat-ready crews to deploy and employ defensive space electromagnetic warfare capabilities for theater combatant commanders. The squadron is Air Force Space Command's first defensive counterspace unit.
The Operational Test and Evaluation Force (OPTEVFOR) is an independent and objective agency within the United States Navy for the operational testing and evaluation (OT&E) of naval aviation, surface warfare, submarine warfare, C4I, cryptologic, and space systems in support Navy and Department of Defense acquisition programs.
The United States Space Force (USSF) is the space service branch of the U.S. Armed Forces. Along with the U.S. Air Force, it is part of the Department of the Air Force, led by the secretary of the Air Force. Its military heads are the chief of space operations, who is one of the Joint Chiefs of Staff, and vice chief of space operations.
Space Operations Command (SpOC) is the United States Space Force's space operations, cyber operations, and intelligence field command. Headquartered at Peterson Space Force Base, Colorado, it consists of its mission deltas, and garrison commands.
Space Delta 2 is the United States Space Force's space domain awareness and space battle management delta and is headquartered at Peterson Space Force Base, Colorado. Space Delta 2 tracks and monitors all human made objects from low Earth orbit to geosynchronous orbit and further out to deep space. It also partners with the National Oceanic and Atmospheric Administration to provide weather satellite observation for the U.S. Armed Forces. It consists of the 15th Space Surveillance, 18th Space Defense Squadron, 19th Space Defense Squadron, and 20th Space Surveillance Squadron.
The United States Space Force is organized by different units: the Space Staff, the field commands, and the space deltas.
While the United States Space Force gained its independence on 20 December 2019, the history of the United States Space Force can be traced back to the beginnings of the military space program following the conclusion of the Second World War in 1945. Early military space development was begun within the United States Army Air Forces by General Henry H. Arnold, who identified space as a crucial military arena decades before the first spaceflight. Gaining its independence from the Army on 18 September 1947, the United States Air Force began development of military space and ballistic missile programs, while also competing with the United States Army and United States Navy for the space mission.
Navy Space Command is the command that serves as the United States Navy service component of the U.S. Space Command. It is tasked with developing space capability to provide the Navy with global communications, targeting, and reconnaissance using space-based assets.
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United States Space Command 
