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Rendezvous and proximity operations event
Definition of a rendezvous and proximity operations (RPO) event
A Rendezvous and Proximity Operations (RPO) Event refers to a scenario or a set of coordinated maneuvers in space where one spacecraft approaches another object, which may be a satellite, spacecraft, or orbital debris, in close proximity. These operations are meticulously planned and executed to observe, inspect, dock, or perform other specific tasks near the target object.
RPO events are critical for various space missions, including satellite servicing, refueling, repair, or deorbiting activities. They require precise navigation and control to ensure safety and success, taking into consideration factors such as relative velocity, trajectory, and potential collision risks.
Additionally, RPO events necessitate advanced space situational awareness (SSA) and systems to monitor and respond to the dynamic space environment, ensuring the maneuvers are conducted securely and efficiently.
Why RPO events concentrate risk in congested LEO
Rendezvous and proximity operations events concentrate risk because they deliberately bring two objects into close range, where small navigation errors, unmodeled forces, or incomplete knowledge of the surrounding traffic can quickly lead to collision, mission loss, or escalation concerns.
Operational teams must maintain accurate, timely awareness of both the chaser and target trajectories, detect unexpected maneuvers, and continuously reassess conjunction risk with third party objects during the approach, inspection, docking, or disposal phases.
In today’s congested LEO, monitoring RPO activity also supports responsible behavior, coordination, and space domain awareness, especially when intent is ambiguous or when servicing and deorbiting operations occur near valuable assets.
How Look Up improves RPO safety with tracking, fusion, and alerts
Look Up supports RPO safety by detecting and tracking objects in LEO with SORASYS radars and by characterizing activity to reduce uncertainty during close approach windows.
SYNAPSE fuses Look Up sensor data with external sources to catalogue objects, alert operators to high interest events within seconds to minutes, and provide a consistent space picture via API or interface, including on premises deployment for sensitive operations.
Using fused tracking and space safety analytics, Look Up helps predict conjunctions and issue collision avoidance warnings, with collision avoidance predictions at a 99.9% accuracy rate, supporting timely decisions and safer maneuvers.
We deliver space situational awareness (SSA) and space domain awareness (SDA) solutions that help secure active satellites and ensure safe operations in the ever-growing expanse of space.