Space Detection and Tracking System

Space Detection and Tracking System
Unit name	Space Detection and Tracking System
Dates	1960 – present
Country	United States
Branch	United States Space Force
Type	Space surveillance network
Role	Space domain awareness
Command structure	United States Space Command
Garrison	Peterson Space Force Base

Space Detection and Tracking System. The Space Detection and Tracking System, often known by its acronym SPADATS, is a foundational United States Department of Defense network for monitoring objects in Earth orbit. Established during the Cold War, its primary mission was to detect, track, and catalog Soviet Union satellite launches and other space debris to support national security. Managed by the United States Space Force under United States Space Command, it represents a critical component of global space domain awareness and forms the historical backbone of the modern Space Surveillance Network.

Overview

The genesis of the Space Detection and Tracking System is directly tied to the launch of Sputnik 1 by the Soviet Union in 1957, which demonstrated a pressing need for dedicated space surveillance. Its development was coordinated by the North American Aerospace Defense Command and involved integrating pre-existing sensor assets from the United States Navy and the United States Air Force. The system's initial operational capability was declared in 1960, providing the first centralized catalog of man-made objects in space. This capability was vital for distinguishing between intercontinental ballistic missile tests and satellite deployments during tense periods like the Cuban Missile Crisis.

System Components

The Space Detection and Tracking System network originally combined data from a diverse array of ground-based and space-based sensors. Key ground-based radars included the AN/FPS-85 phased array radar at Eglin Air Force Base and the Millstone Hill radar operated by the Massachusetts Institute of Technology. Optical tracking was performed by sites like the Baker-Nunn cameras, part of the Smithsonian Astrophysical Observatory network. The system also incorporated data from the Naval Space Surveillance System and the Air Force Space Track System. Later, it integrated contributions from the Ground-based Electro-Optical Deep Space Surveillance system and sensors at locations like Diego Garcia.

Operational Capabilities

The core function of the Space Detection and Tracking System was to maintain a continuously updated catalog, known as the Space Object Catalog, containing orbital elements for thousands of tracked objects. It provided tasking to its distributed sensors to perform specific observations, a process coordinated through the Space Defense Center. The system could determine launch points, predict orbital paths, and assess potential re-entry events, supporting missions for NASA and warning of possible threats. Its data was essential for avoiding collisions during key missions like the Apollo program and the operations of the Space Shuttle.

Development and Deployment

Early development was spearheaded by the United States Air Force under projects like SPACETRACK. The formal establishment of the Space Detection and Tracking System involved merging the Navy's SPASUR network with the Air Force's capabilities. Significant upgrades occurred throughout the 1960s and 1970s, including the deployment of more powerful radars like the AN/FPS-85 and the incorporation of data from the Defense Support Program satellites for launch detection. The system's operational management was historically a joint effort between NORAD and the United States Space Command upon its establishment.

Role in Space Domain Awareness

The Space Detection and Tracking System established the foundational processes for modern space domain awareness, a discipline critical for safe and secure space operations. Its cataloging work directly enabled the protection of vital national assets such as GPS satellites and reconnaissance satellite constellations. The system's legacy is evident in today's Space Surveillance Network, which continues to track an ever-growing population of space debris and active satellites. This awareness is crucial for supporting international agreements and treaties governing space activities.

International Systems and Cooperation

While the Space Detection and Tracking System was a United States-centric network, its success highlighted the global need for space surveillance. This led to cooperation with allies, including sharing data with organizations like NATO. Other nations developed their own independent systems, such as the Russian Space Surveillance System operated by the Russian Aerospace Forces, and the emerging capabilities of the European Space Agency through its Space Situational Awareness programme. Today, data sharing between the United States Space Force, the European Union, and agencies like JAXA is a key aspect of global space traffic management.

Category:Space surveillance Category:United States Space Force Category:Military electronics of the United States