spacetime / tracksEarth ↗

Motion, made visible

See the space between.

Two survey tracks. One shared view.
Watch geometry change with time.

SYNTHETIC REPLAYT + 00.0 s
LOCAL FRAME METERS · NORTH ↑
● Survey A● Survey B
12 s spacing ≥ 80 m
Estimated separation—
Closest approach · next 12 s—
Observation age—

Status uses forecast centers only; uncertainty excluded.

Trails retain 12 seconds of motion. The thin lines connect both tracks at the same instant.

Model & evidence

Illustrative local Cartesian frame. A travels east at 10 m/s; B travels south at 10 m/s. Paths are prescribed and do not respond to each other. Closest approach assumes constant velocity over the next 12 seconds. The amber warning uses an illustrative 80 m center-to-center threshold.

With observations removed after 18 seconds, displayed positions extrapolate the last prescribed velocities. Each illustrative uncertainty radius grows from 12 m at 5 m per second without observations. These circles are visual assumptions, not calibrated probabilities or sensor performance. The warning does not incorporate uncertainty.

Synthetic data only. No live tracking, collision-avoidance control, or navigation-integrity claim. Inspect model ↗ · Visual reference: Alloy Robotics ↗