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The Evolution of US Military Satellites from the Cold War to Space Force

In late 1970, a historically significant Titan IIIC rocket launched from Space Launch Complex 40 at Cape Canaveral Air Force Station, carrying a top-secret US military payload.

Since then, spaceflight has undergone dramatic changes. The Titan IIIC, despite its initial successes, faced a critical failure in 1982 after numerous launches. The legacy of the Titan rockets at Space Launch Complex 40 ended in 2005 when the U.S. Air Force transferred the site to the up-and-coming SpaceX, following a competitive selection process that faced strong opposition from United Launch Alliance. Today, Cape Canaveral proudly serves as the headquarters for the newly established Space Force.

What happened to the mysterious payloads of the past? Just recently, it was revealed that some of these enigmatic satellites were still in operation until last month.

Declassified: The Defense Support Project Satellite Revealed

Unveiled by the U.S. government, the secret payload launched in November 1970 was a groundbreaking “Defense Support Project” satellite. The initial satellites from this program, launched between 1970 and 1973, featured a mass of approximately 1 ton each and were equipped with around 2,000 infrared detectors. These detectors functioned as ultra-sensitive telescopes, with each satellite being placed into geostationary orbit.

During the height of the Cold War, these satellites held significant importance for the United States, serving a crucial role in identifying potential nuclear threats targeting American soil. The Defense Assistance Program became a cornerstone of America’s space-based military capabilities during this tense era.

Originally designed to detect Soviet intercontinental ballistic missiles, these early satellites evolved to provide vital support in conventional warfare scenarios, including the detection of Iraqi Scud missile launches. As the program progressed, the number of infrared detectors on each satellite increased to over 6,000, and their mass rose to around 2.5 tons. The Defense Assistance Program satellites remained operational until 2007, with one notable launch occurring aboard the Space Shuttle (Atlantis) in 1991.

Source: arstechnica.com