Read the sky.

Tells you that an object fired its engine, when, and how hard, without tasking a sensor. It works by subtracting the drift physics explains, the Earth's equatorial bulge (J2) and atmospheric drag, from the object's public element-set history. Whatever residual Δv is left is somebody's engine.

Names what the burn was for: station-keeping, an orbit raise or lower, a rendezvous, or collision-avoidance. Each call carries a confidence band and a written rationale from a rule-based model, so an analyst can check the reasoning rather than take it on faith. No black box to trust.

Flags an object the moment it breaks its own routine, judged against its own prior history rather than a fleet average. Dormant-then-active is the classic early warning. The model is learned rather than hand-tuned: scored on held-out data by an exact port of the public SPLID evaluator, it more than quadruples the F₂ of the fixed-rule baseline it replaces.

Watches for something deliberately holding station beside one of your assets. It separates a purchased geometry from an incidental pass and from a benign co-orbiting formation. One-sidedness is the discriminator, shown under Evidence.

Ranks which close approaches are worth an analyst's morning. Screening is calibrated against 162,634 ESA close-approach reports, scoring 0.963 ROC-AUC and 0.010 Brier on that set. Public element sets carry no covariance, so this is a labeled screening prior, not an operational probability of collision.