# 📐 L2 Spec — Volcanic Deformation — InSAR/GPS source modeling Mismatch-Only Spec
**ID:** `L2-288-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-288`](/artifact/l1/L1-288)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.48 · **Delta tier:** 5
> **⛓ On-chain block:** 41554069
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 128 – 8192 |
| W | px | 128 – 8192 |
| N gps | — | 1 – 1000 |
| Snr db | dB | 0 – 40 |
| Unwrap error | — | 0.0 – 0.2 |
| Topography error | — | 0.0 – 0.2 |
| Atmospheric noise | — | 0.0 – 0.3 |
| Ionospheric delay | — | 0.0 – 0.3 |
## 2. Tolerance (ε)
**Type:** `fn`
```
1.5 + 5.0*atmospheric_noise + 5.0*topography_error + 5.0*ionospheric_delay + 5.0*unwrap_error
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |
## 4. Fingerprint
`2fa32770e71c11b1c1a2d3db4c4e42b56d2d411c4ac830fcf637888c7d5014e1`
## 5. On-chain Registration
- **Chain hash:** `0x06669d5272e58446947274048143b9c0140c72a04cc1a6f0c4053bdd5199d289`
- **Chain tx hash:** `0xd31f7787d3a666cb899daed0ab4ded8701e3fcd6ad1f41692794477c61fcea37`
- **Chain block:** `41554069`
---
## File Mapping
This bundle consists of: `L2-288-001.md`, `L2-288-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-288-001.md` | Source of truth — edit this | Human or LLM |
| `L2-288-001.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 `L2-288-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._