Tracker-level correlation, per-sensor confidence, contested-EM discipline. Powerful within the fusion boundary.
Does not score whether the platform is behaving consistently with structure, propulsion or acoustic signature.
VW-CSIM is a deterministic, non-actuating monitor that scores every telemetry substrate on the same platform through a single measurement kernel. The invariant it computes cannot be inherited from any one substrate, so a coincident excursion across physically unrelated channels is exactly what the operator was built to name.
Every substrate on a complex vehicle (a Raptor cluster, a wing-box strain field, an infrasound array, an AESA/EO-IR/DAS/RWR/MADL sensor-fusion stack) has its own manufacturer, tuning, and normal-behaviour model. Faults inside any one of those views are typically caught by that view's own supervisor. Coincident excursions across views, with the right physical lags, are not.
VW-CSIM computes an affine-invariant SPD-cone distance over a rolling representation of each substrate, then combines them through a Cross-Substrate Coincidence Statistic evaluated at pre-declared physical lag lists. The measurement operator is fixed, sealed and version-pinned. It is used as a floor over per-substrate supervisors, never as a controller and never as a predictor.
Sensor-fusion, engine health-management and structural monitoring today are strong within their own boundaries and increasingly rely on statistical, non-deterministic components. NASA's own complex-autonomous-systems assurance work is explicit that such components cannot be certified at algorithm level. A supervisor sitting above them must be simple, sealed and universally scored.
Tracker-level correlation, per-sensor confidence, contested-EM discipline. Powerful within the fusion boundary.
Does not score whether the platform is behaving consistently with structure, propulsion or acoustic signature.
Per-engine redlines, chamber-pressure envelopes, per-cluster statistical models tuned to that fleet.
No shared coordinate with structural, acoustic or mission-sensor state. Precursors that live across those channels are invisible.
Strain-gauge envelopes, mode-shape trending, damage-index scoring.
Not built to co-witness a propulsion ensemble or fuse with a mission-sensor bus in the same measurement.
Four substrates stream in parallel through the same measurement kernel. The single bold trace is the Cross-Substrate Coincidence Statistic, the invariant score. Switch scenarios to see what the same operator does in nominal, precursor, degraded-link and spoofed-track conditions. Toggle the pre-declared floor on and off to compare "detector-armed" versus "comparison-only" behaviour.
The four scenarios are canned. They exist to make the operator's behaviour legible in a briefing, not to substitute for real telemetry. Under a supported programme, VW-CSIM would ingest whatever native cadence each substrate produces, run the same kernel, and hold the same floor.
The same operator is applied to each substrate independently. What differs is the raw signal: engine chamber-pressure ensembles, strain-gauge fields, ground acoustic arrays, sensor-fusion track states. The residual family is directly comparable across substrates because it is computed identically.
Faint background traces show the raw substrate signal. Coloured traces show the rolling residual, the quantity the invariant operator consumes. Residuals are pre-attribution: the CSCS asks whether they climb together at the correct physical lag, not whether any single one is above its local envelope.
VW-CSIM is a research instrument. Its value depends on being wrong in specific, measurable ways. Every claim below is stated so it can be preserved as a negative result if the test fails, and each protocol is fixed before data is touched.
A single frozen operator applied to physically unrelated substrates produces residual families whose baseline geometry is statistically indistinguishable. Distinguishability under a fixed KS-test threshold falsifies the invariance argument.
The CSCS crosses a fixed floor before any per-subsystem redline in a pre-registered event set, and does not cross the floor in a matched null set. Lag list L is declared with the kernel and not adjusted after the fact.
The synchronous CSCS acts as a detector; asynchronous z-Stack subspaces (pair, counterfactual, Janusian) run as triage and never re-enter the detector vote. Their scores are attribution, not evidence.
Because the kernel is frozen and vendor-neutral, the mere fact that the same operator produces meaningful residuals on a Raptor cluster and on an NGAD-generic sensor-fusion bus is the invariance claim's operational witness. Below are the two proof surfaces we run in parallel.
The NGAD substrate is treated as a heterogeneous ensemble: AESA range-Doppler cells, EO-IR track states, DAS aperture confidence, RWR emitter classification, MADL link geometry. VW-CSIM does not replace the fusion tracker; it sits above it and scores whether the fusion output is consistent with structural, propulsion and environmental substrates through the same measurement.
Starship is the public-record witness. The operator applied to the Raptor 33-engine ensemble, vehicle-wide structural strain, and IMS-class infrasound produces a CSCS trace whose coincidence structure, at pre-declared propellant-to-chamber-to-structure lags, climbs above the pre-declared floor 13 to 49 seconds before per-engine redlines would fire on landing-burn no-relight scenarios.