米中露が静止軌道で接近監視合戦、ロシアも参戦」 Three's a party: US, China, and now Russia are on the prowl in GEO

Geostationary orbit, the ring of space some 36,000 kilometers above the equator, has long been treated as a relatively orderly neighborhood. That perception is shifting. Russia has reportedly begun maneuvering satellites close to foreign spacecraft in GEO, joining the United States and China in what has become an active game of orbital surveillance among three major powers.

GEO is home to many of the world's most strategically valuable spacecraft: communications relays, missile early-warning sensors, signals intelligence platforms, and broadcast satellites. Because objects there appear stationary relative to the ground, they function almost like fixed infrastructure, which makes them both highly useful and highly attractive as intelligence targets. Close-approach operations, often called rendezvous and proximity operations or RPO, allow one satellite to image another, characterize its antennas, or infer its mission.

The US has openly operated the Northrop Grumman-built GSSAP satellites for more than a decade, drifting them around GEO to inspect objects of interest. China has demonstrated similar capabilities through its Shijian series; SJ-21 famously towed a defunct Beidou navigation satellite into a graveyard orbit in 2022, a maneuver that doubles as a demonstration of how such a vehicle could grapple an adversary's spacecraft. Russia's apparent entry into this same pattern of behavior suggests GEO is becoming a genuinely tripolar arena rather than a two-player contest.

The development arrives against a broader strategic backdrop. While public attention has focused on the explosion of low-Earth-orbit megaconstellations like Starlink, military planners continue to view GEO as decisive terrain. The US Space Force has explicitly reclassified the belt as a contested domain and has been funding more agile, smaller inspector satellites to complement the aging GSSAP fleet. Commercial space situational awareness firms such as LeoLabs, COMSPOC, and ExoAnalytic Solutions have also expanded ground-based optical tracking networks, making unusual maneuvers far more visible to outside analysts than they were even a few years ago. Much of what is publicly known about Russian and Chinese RPO activity stems from this commercial tracking layer.

Nothing reported so far suggests physical contact or active interference between satellites, and operators typically maintain safe separation distances even during inspection passes. Still, the normalization of close approaches raises the risk of misinterpretation. A satellite drifting within a few kilometers of another could be characterized as routine observation by one government and as a hostile act by another. There is no widely accepted code of conduct governing such behavior, and diplomatic efforts at the United Nations to define responsible behaviors in space have moved slowly.

For now, the three-way pattern is likely to persist and possibly intensify. Each power has incentives to understand its rivals' on-orbit capabilities, and each has demonstrated the technical means to do so. Whether that competition remains stable or drifts toward more provocative actions, such as jamming, dazzling, or even physical interaction, may depend less on technology than on the political guardrails the spacefaring nations choose to build around their increasingly crowded high ground.