# 📐 L2 Spec — Doppler Weather Radar Mismatch-Only Spec
**ID:** `L2-105-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-105`](/artifact/l1/L1-105)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41554201
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| N az | — | 180 – 1440 |
| N el | — | 1 – 25 |
| Prf hz | Hz | 200 – 5000 |
| Snr db | dB | 5.0 – 40.0 |
| N range | — | 100 – 2000 |
| Clutter | — | 0.0 – 0.5 |
| Aliasing | — | 0.0 – 0.5 |
| Lambda cm | — | 0.5 – 30 |
| Beam blockage | — | 0.0 – 0.3 |
| Ap propagation | — | 0.0 – 0.3 |
## 2. Tolerance (ε)
**Type:** `fn`
```
18.0 + 0.3 * SNR_dB - 8.0 * beam_blockage - 10.0 * aliasing - 6.0 * clutter
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |
## 4. Fingerprint
`e4ffdef5bd2b4d5b3fa4793e4fb05c4b4e7a58e7d08b1e72251d6ccc74f052d5`
## 5. On-chain Registration
- **Chain hash:** `0xda24a7eb7b7d0589e0be242613fcc5dfb4d774bcf066469cda05284d3deb3f16`
- **Chain tx hash:** `0xe959268464b224f7609c608dc22babcb254e5a9b95bc63ab88fa0b91d707b441`
- **Chain block:** `41554201`
---
## File Mapping
This bundle consists of: `L2-105-001.md`, `L2-105-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-105-001.md` | Source of truth — edit this | Human or LLM |
| `L2-105-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-105-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._