FA-12082 / Sensor fusion consistency / Member archive

Delayed measurement is applied at the current state epoch · case 02

A late position fix pulls the present estimate backwards along the trajectory.

Member previewVariant 2 · 3 implementations · 6 checks per implementation

Case contract

Constant known velocity model: x is current position, age nonnegative delay, z delayed position measurement. Return current position after a half-gain historical update and replay, as a fraction string.

Why this case matters

Deterministic sensor-fusion model isolating one consistency contract; no hardware or production estimator is simulated.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
consistent delayed fix	`"18"`	`"20"`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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