The preliminary notice, published Thursday, is an extension of the boost-phase interceptor (SBI) prototype program launched by the force in September, which is based on a prize-based contractual model for technical competitions. The notice stated that the SSC anticipates signing "several other transaction agreements" at fixed prices, with the potential to incorporate "prize-based competitions."
The notice lacks many technical details, except to confirm that the program focuses on hit-to- kill systems, rather than directed-energy systems, to intercept missiles during their orbital trajectory. Instead of providing specifications, companies are asked to apply for tender documents, which will only be awarded to those who meet government criteria.
The command has set December 4 as the deadline for companies to request tender documents, while expecting to award the first contracts in February 2026, according to Inside Defense, which was the first to reveal the announcement.
In theory, creating a suite of interceptor systems in space provides the Space Force with additional capability to intercept intercontinental ballistic missiles that might evade first-stage launch intercepts.
Interceptor systems in the mid-flight phase have advantages compared to early interceptor systems, most notably the shorter engagement distance and the absence of atmospheric effects, which makes kinetic or directed-energy targeting operations more stable.
However, this approach faces significant challenges, particularly the ability of adversaries to use decoys when the missile enters its orbit and its engine radiation is turned off, making it difficult to distinguish between the real warhead and similar, weakly radiated decoys.
Defense circles believe that the space-based interceptor program for the middle stage will be a key focus in developing multiple layers of American missile defense, but it remains a high-risk project both technically and politically.
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