Space Force Retired Final DSP Warning Satellites
The last two Defense Support Program satellites were moved to a graveyard orbit following a September exercise.
Updated on Oct. 1, 2026 in Space
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The U.S. Space Force has officially decommissioned the final two satellites in the legacy Defense Support Program. These assets were moved to a supersynchronous graveyard orbit after completing a U.S. Space Command demonstration in September 2026.
Why it matters
Decommissioning the aging constellation allows the Space Force to reallocate personnel and operational focus toward the upcoming Next-Generation Overhead Persistent Infrared satellite architecture.
The Defense Support Program constellation totaled 23 units, with the final satellite launched in 2007. Currently, the operational Space-Based Infrared System includes six satellites in geosynchronous orbit and four in highly elliptical orbit.
The players
U.S. Space Force
This is the branch of the United States Armed Forces responsible for military operations in outer space.
U.S. Space Command
This unified combatant command is responsible for protecting and defending U.S. and allied interests in space.
2nd Space Warning Squadron
This unit is responsible for monitoring and operating space-based missile warning sensors.
The details
The decommissioned units concluded their service following a dynamic maneuvering demonstration in early September 2026. 2nd Space Warning Squadron operators are now transitioning their attention toward the launch of the first Next-Generation Overhead Persistent Infrared satellites.
Timeline
1970: The Defense Support Program began with its first satellite launch.
1991: The DSP system was utilized for missile detection during Operation Desert Storm.
2007: The final Defense Support Program satellite reached orbit.
September 2026: The last two satellites participated in a U.S. Space Command exercise.
October 1, 2026: The Space Force confirmed the formal decommissioning of the satellites.
Deeper Dive
The transition from the Defense Support Program to the Next-Generation Overhead Persistent Infrared program represents a fundamental modernization of national missile warning capabilities. This shift retires legacy platforms to integrate advanced sensor arrays capable of faster threat detection.
The modernization of missile warning systems aims to improve the detection speed and accuracy of incoming threats. These technological advancements are essential for maintaining national security and protecting domestic infrastructure from modern ballistic developments.
The takeaway
The retirement of these decades-old satellites highlights the transition toward more modern, responsive orbital defense technologies. Future space infrastructure remains contingent on sustained legislative support and federal budget allocations.
What happens next
The Space Force expects to launch the first of two Next-Generation Overhead Persistent Infrared satellites in the coming months.
Further reading
For more information on current orbital missions, visit the Space section.
Source note: This article includes information reported by Air & Space Forces Magazine.
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