Space Force backs counter-surveillance sensors for satellites in geosynchronous orbit

Making satellites more aware of who is watching them

The U.S. Space Force is funding a new set of payloads designed to tell satellites when they are being monitored from the ground. On April 29, the Space Rapid Capabilities Office said it selected three companies to develop sensors able to detect and characterize emissions from ground-based radars that track U.S. spacecraft in geosynchronous orbit.

The awards went to Assurance Technology Corp. of Massachusetts, Raptor Dynamix of Colorado and Innovative Signal Analysis of Texas. Each contract is worth $3 million and is being issued through a Small Business Innovation Research program in collaboration with SpaceWERX. The project focuses on low-cost, small payloads for military satellites.

The target mission is specific but strategically important. Geosynchronous orbit hosts some of the military’s most valuable space assets, including satellites tied to communications, warning and other high-priority functions. If those spacecraft can determine in real time that they are being observed, tracked or targeted by adversarial radar systems, operators gain a better chance to interpret risk and respond appropriately.

From passive hardware to tactical awareness

The Space Rapid Capabilities Office described the systems as advanced radar-warning receivers for dynamically maneuverable satellites in geostationary orbit. Kelly Hammett, director of the office, called them “tactical awareness sensors” that would help the Space Force discern whether maneuverable satellites are under observation or threat.

That language reflects a broader shift in military space doctrine. For years, many satellites were built primarily for mission delivery rather than self-protection. As orbital competition has intensified, resilience increasingly depends on satellites becoming more capable of sensing their environment, identifying suspicious activity and supporting defensive decision-making.

These payloads fit that trend. Rather than waiting for ground analysts to infer hostile surveillance from external data, the concept is to give the spacecraft direct awareness of the signals directed at them. The Space RCO said the sensors would allow the U.S. Space Force to determine in real time if orbital assets are being monitored or targeted by adversarial systems.

Why radar detection matters in orbit

Ground-based radar tracking is not inherently hostile. States routinely monitor objects in orbit for space-domain awareness, safety and intelligence purposes. But in a military context, knowing when a specific satellite is being persistently tracked can offer clues about intent. It may indicate characterization, cueing for future action or preparation for interference.

That is especially relevant for maneuverable satellites. The ability to change position or orientation in response to a potential threat is far more useful if the spacecraft has timely information about what triggered the concern. A radar-warning receiver does not solve the threat problem by itself, but it can shorten the loop between detection and response.

The low-cost, small-payload framing is also notable. Space security programs often struggle with the tradeoff between capability and scale. If counter-surveillance payloads can be made compact and affordable enough, they are more likely to be deployed across a broader set of spacecraft instead of being reserved for only the most exquisite platforms.

Military planners have been moving toward that kind of distributed resilience for several years. The logic is straightforward: a force that can detect, interpret and adapt is harder to surprise. In space, where line-of-sight, timing and signal awareness matter enormously, onboard sensing has become part of the resilience equation.

The contracts do not mean an operational capability is ready. They fund development, not deployment. But they show where the Space Force is placing its emphasis. The service wants satellites that are not just maneuverable in principle, but informed enough to use that maneuverability intelligently.

As orbital competition grows more contested, that kind of awareness may become routine rather than specialized. The new payloads are a step toward satellites that can do more than perform missions in silence. They may eventually function as participants in their own protection, continuously listening for the signatures of attention from below.

This article is based on reporting by SpaceNews. Read the original article.