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NADIR Meridian Shadow-mode advisory Balanced · efficient · production default

Algorithm tier deliverable

Production fleet intelligence with survival curves and maintenance queues

NADIR Meridian is the default pilot SKU — survival curves, trust-region gating, batch residual scoring, and HORIZON Command Deck without the full forensic ensemble cost of Apex.

linear + accelerating regime trust-region gating batch residual survival curves Mahalanobis fusion
View Meridian pricing Compare all tiers Calibration Lab

Production default

Why fleets graduate from Pulse to Meridian

Meridian is the default pilot SKU: same telemetry ingest as Pulse, with motion gating, CUSUM changepoint detection, trust-region tier smoothing, and survival-curve forecasts — without Apex forensic compute.

Motion gating

Fewer false shop dispatches

Suppresses parking-lot and urban stop-go CAUTION before drift onset — the #1 Pulse complaint in high-volume fleets.

CUSUM changepoint

Earlier ramp detection

Gradual extrinsic ramps trigger changepoint boost before hard Mahalanobis gates — lower time-to-detect on slow-onset scenarios.

Trust-region gating

Smoother tier transitions

Max one tier rank step per frame with de-escalation cooldown — higher stability score vs Pulse hard gates.

HORIZON Command Deck

Operations surface included

CRITICAL queue, survival t10/t50/t90, and Forecast Studio regime bands ship with Meridian seats — not a separate SKU.

vs Pulse

Upgrade without re-architecture

Same API keys and ingest paths — flip algorithm tier scope from drift:pulse to production default.

Honest boundary

Simulated in tier benchmark

Demo overlays approximate Meridian behavior; full ensemble math ships per roadmap. Shadow-mode advisory only.

See 100-scenario benchmark Open comparison lab

Capability map

What Meridian includes

Survival curves

Weibull MLE — t10, t50, t90 time-to-tier estimates.

CRITICAL queue

Maintenance scheduling rail with weekly digest.

Regime forecast

Linear + accelerating drift regime with trust-region gating.

HORIZON Command Deck

Live KPI rail + Forecast Studio modules.

Evidence samples

5 signed bundle exports per month for legal review.

Batch scoring

Idempotent residual batch with fleet CSV export.

Supported

  • Continuous tier classification
  • Linear + accelerating regime forecast
  • Batch residual scoring with idempotency
  • Time-to-tier survival curves
  • Console dashboard · 3 seats
  • CRITICAL maintenance queue
  • Signed evidence samples (limited)
  • HORIZON Command Deck + Forecast Studio

Not included on Meridian

  • Full BOCPD + HSMM + spectral GLR ensemble
  • CRLB 3D ellipsoid / Fleet Twin WebGL
  • Budget knapsack fleet prioritizer
  • Factor-graph evidence theater
  • What-if counterfactual planner
  • Geospatial identifiability heatmap

Commercial

Meridian pricing

Indicative USD pricing · shadow-mode on every tier · binding terms in LOI or MSA.

Meridian

$3.75

per vehicle / month

  • Continuous tier classification
  • Linear + accelerating regime forecast
  • Batch residual scoring with idempotency
  • Time-to-tier survival curves
  • Console dashboard · 3 seats
  • CRITICAL maintenance queue

$750/mo cap at ≤200 vehicles

Build LOI →

ROI estimator

Model annual NADIR cost vs calibration-incident avoidance for buyer conversations.

Claim boundary: NADIR is shadow-mode reliability analytics. Not ISO 26262 / ASIL safety-certified. Not in-loop vehicle control. Forecasts and tiers are advisory operational analytics.

Developer surface

Meridian API scopes & endpoints

Org-scoped Bearer API keys · RBAC scopes gate algorithm depth · OpenAPI v1 contract.

Required scopes

fleet:read

Health, extrinsics, history

fleet:write

Fleet import/export

drift:meridian

Survival + regime forecast lane

horizon:read

Command Deck + Forecast Studio

evidence:read

Limited signed bundle exports

Primary endpoints

GET /v1/fleet/health-summary <400ms
GET /v1/horizon/forecast/{id} <1.2s
GET /v1/vehicles/{id}/extrinsics <600ms
GET /v1/evidence/{id}/bundle <2s
GET /v1/drift-analysis/residual-score/stream SSE

Latency profile (p50–max)

Demo instrumentation

Go-to-market

Who buys Meridian

Regional fleet director

“Which vehicles need service this week — ranked with time-to-CRITICAL.”

Typical buyer on NADIR Meridian.

MSO QA lead

“Post-windshield calibration evidence for shop networks.”

Typical buyer on NADIR Meridian.

Maintenance program sponsor

“$750 shadow pilot with conversion path to subscription.”

Typical buyer on NADIR Meridian.

Safety engineer

“Survival curves without standing up a data science team.”

Typical buyer on NADIR Meridian.

Onboarding

Integration timeline

Day 0 — API key + sandbox fleet

12-vehicle sample org · all scopes for integration testing · make dev-api local stack.

Week 1 — Telemetry ingest

Wire POST /v1/telemetry/ingest from telematics or batch replay · validate tier gates.

Week 2–4 — Shadow evaluation

Console or webhook alerts · weekly digest · Exhibit A metrics for LOI conversion.

Conversion — production tier

Per-vehicle billing at Meridian rate · optional API add-ons per integration depth.

Mahalanobis drift trace (simulated scenario)

Meridian overlay
Ground truth ● Meridian detection
89%
Detection score
95%
Attribution accuracy*
55%
Efficiency score
100%
Shadow-mode safety

Compare

Meridian vs other tiers

Capability Pulse Meridian Apex
Tier gates (NOMINAL/CAUTION/CRITICAL)✓✓✓
Survival / time-to-CRITICAL—✓✓ full
HORIZON Command Deck—✓✓
3D Fleet Twin + CRLB——✓
Signed evidence exports—LimitedUnlimited
Typical latency<200ms0.5–2s2–8s
Per-vehicle / mo$3–5$3.75$8.50
Pulse → Meridian → Apex

SDK reference

Python SDK modules for Meridian

Install: pip install -e "NADIR_SDK/python[dev]" · TypeScript client at NADIR_SDK/typescript

Core modules

nadir_sdk.scoring.pipeline_v3Multi-signal fusion · changepoint lane
SDK
nadir_sdk.scoring.enginescore_residual() production path
SDK
nadir_sdk.perception.forecasting.survivalWeibull MLE · t10/t50/t90
SDK

Example: score telemetry payload

from nadir_sdk.scoring import score_residual

result = score_residual(request)  # Meridian lane via pipeline_v3
# includes survival_t10_days, regime, recommended_action

Telemetry contract

Ingest payload shape

Same JSON schema across tiers — algorithm depth is selected by org plan and ?tier= routing.

{
  "vehicle_id": "van-0142",
  "timestamp": "2026-06-10T14:22:01Z",
  "sensors": {
    "camera_rotation_matrix": [1.0, 0.01, 0.0, -0.01, 1.0, 0.0, 0.0, 0.0, 1.0],
    "radar_range_bias_m": 0.002,
    "radar_azimuth_bias_deg": 0.15,
    "lidar_registration_error_m": 0.001
  },
  "timestamp_quality": { "sync_ok": true, "jitter_ms": 4 }
}

camera_rotation_matrix

9-element row-major rotation vs baseline. Primary signal for extrinsic drift.

radar_range_bias_m

Range systematic error in meters — converted to mm in residual vector.

lidar_registration_error_m

Cross-modal registration residual for fusion disagreement detection.

timestamp_quality

sync_ok and jitter_ms — gates unreliable frames before scoring on Meridian+.

organization_id

Resolved from API key context — strict org isolation on every fleet record.

Deployment patterns

Meridian use cases in production conversations

Regional food distribution

85-van fleet — CRITICAL queue integrated with shop dispatch spreadsheet.

Campus shuttle operator

120-vehicle Midwest shuttle — survival curves for board safety review.

Amazon DSP contractor

Local DSP owner — shadow pilot with Exhibit A week-1 metrics.

Glass network QA

Post-windshield calibration verification across 40 shops.

Utility contractor fleet

Service trucks with camera ADAS — maintenance budget holder buys on queue.

School bus contractor

Growing camera mandate — Meridian digest for insurance renewal.

Operations

SLA, quotas, and support

Rate limits (Meridian)

Ingest bucketPulse-optimized batch POST
50k/day
Read bucketFleet health + extrinsics
20k/day
Forecast computeIncluded
—
Overage blocks+10k ingest
$50

Support tier

Micro pilotBusiness-hours email · 1 kickoff call
Included
SubscriptionSuccess check-in monthly
Std
Evidence exports5/mo
Meridian
Console seats3 included
—

Terminology

Glossary for buyer conversations

Mahalanobis distance

Multi-sensor drift vector fused into one statistical distance — core signal on every tier.

Extrinsic drift

6-DOF misalignment of camera/radar/lidar relative to vehicle frame.

Shadow mode

Advisory analytics only — no ECU writes or in-loop vehicle control.

Tier gate

NOMINAL / CAUTION / CRITICAL classification from residual thresholds.

Chain of custody

Signed evidence bundle metadata for insurer and auditor review.

Survival curve

Time-to-tier exceedance probabilities (Meridian+).

CRLB ellipsoid

Fisher-information uncertainty glyph for 3D twin (Apex).

Idempotency-Key

POST replay protection — cached response on duplicate ingest.

Org isolation

API key from Org A cannot read Org B fleet records.

Exhibit A

LOI attachment with week-1 pilot metrics JSON.

Quick integration

cURL ingest example

curl -sS -X POST "https://api.nadirai.net/v1/telemetry/ingest?tier=meridian" \
  -H "Authorization: Bearer $NADIR_API_KEY" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: ingest-van-0142-20260610" \
  -d @telemetry_frame.json

Webhook payload (tier transition)

{
  "event": "tier.changed",
  "vehicle_id": "van-0142",
  "previous_tier": "NOMINAL",
  "drift_tier": "CAUTION",
  "mahalanobis_distance": 3.42,
  "probable_fault_source": "camera_extrinsics",
  "algorithm_tier": "meridian",
  "organization_id": "org-acme-regional"
}

Extended FAQ

Integration & commercial

How do API keys map to tiers?
Org-level plan sets default algorithm lane. Pass ?tier=meridian on scoring routes when permitted by scope.
What telemetry frequency is required?
Daily batch minimum for pilot; hourly or event-driven for production CRITICAL sensitivity.
Can we self-host?
NADIR cloud is default; edge gateway pattern documented in NADIR_SDK/examples/edge_vehicle_gateway/.
What vehicles are supported?
Any ADAS-equipped van, shuttle, or passenger vehicle with camera/radar metadata in telemetry.
How does billing work?
Per-vehicle per month at $3.75 — prorated on tier changes mid-cycle.
Is there a free tier?
Developer sandbox with 12-vehicle sample fleet — $0 for integration testing.
What about Echo archival?
Batch replay add-on — can replay stored telemetry at Meridian or Apex depth.
How do webhooks sign payloads?
HMAC-SHA256 with org webhook secret — verify utils in nadir_sdk.webhooks.
What's in the weekly digest?
Tier counts, CRITICAL queue delta, top drift vectors, Exhibit A summary metrics.
Who owns the data?
Customer telemetry — NADIR processes under DPA; evidence exports are customer-controlled.

FAQ

Meridian questions

Why is Meridian the default pilot SKU?
Best margin vs compute: survival + queue without Apex WebGL/ensemble cost.
What's included in the $750 micro-fleet pilot?
≤200 vehicles at Meridian depth for 4–6 weeks with Exhibit A metrics.
Do I need Apex for HORIZON?
Command Deck and Forecast Studio are Meridian+. 3D Twin and Map are Apex only.

Tier benchmark · Phase 3

Meridian vs Pulse on 100 seeded scenarios

Motion gating cuts parking-lot false CAUTION. CUSUM detects ramps earlier. Trust-region smoothing reduces flicker — all simulated in the tier benchmark lab (not final pipeline_v3).

Open Meridian batch Embed demo

*Simulation benchmark — illustrative for buyer demos and incubator appendices.

Deploy NADIR Meridian in shadow mode

$750/mo cap at ≤200 vehicles · same claim boundary on every tier · upgrade path without re-architecture.

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