Global Counterspace Capabilities:
An Open Source Assessment
Secure World Foundation
The following excerpt from the report summarizes U.S. counterspace capabilities.
The United States has conducted multiple tests of technologies for rendezvous and proximity operations (RPO) in both low Earth orbit (LEO) and geosynchronous Earth orbit (GEO), along with tracking, targeting, and intercept technologies that could lead to a co-orbital anti-satellite (ASAT) capability.
These tests and demonstrations were conducted for other non-offensive missions, such as missile defense, on-orbit inspections, and satellite servicing, and the United States does not have an acknowledged program to develop co-orbital capabilities. However, the United States possesses the technological capability to develop a co-orbital capability in a short period of time if it chooses to.