Reports

While the United States does not have an operational, acknowledged direct ascent anti-satellite (DA-ASAT) system, it does have operational midcourse missile defense interceptors that have been demonstrated in an ASAT role against a satellite in a very low orbit.

The United States has conducted one co-orbital intercept test in 1986 with the Delta 180 experiment as part of the Strategic Defense Initiative Organization.

The X-37B Orbital Test Vehicle (OTV) is a technology demonstrator and experimental vehicle which is likely used for testing new reusable space launch vehicle technologies (such as guidance and thermal protection) and on-orbit testing of new sensor technologies and satellite hardware for risk reduction.

Over the past two decades, several countries have begun developing rendezvous and proximity (RPO) technologies for non-military purposes such as satellite inspection, refueling, repairs, on-orbit assembly, and debris removal.

Over the last forty years, the United States has developed significant capabilities for conducting robotic rendezvous and proximity operations (RPO) to support military and intelligence-related space activities.