# 📐  L2 Spec — Solar EUV/X-ray Image Reconstruction — Nominal + Mismatch Specs

**ID:** `L2-169-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-169`](/artifact/l1/L1-169)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.32 · **Delta tier:** 5
> **⛓ On-chain block:** 41554248

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| H | px | 128 – 4096 |
| W | px | 128 – 4096 |
| N t bins | — | 10 – 50 |
| N channels | — | 3 – 12 |
| Noise sigma percent | — | 1.0 – 20.0 |

## 2. Tolerance (ε)

**Type:** `fn`

```
1.0 + 0.3 * exp(-N_channels / 6)
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.32 |
| Delta tier | 5 |

## 4. Fingerprint

`e395484b6b69150d253aec4eff1e53dea078bba055cc6ff6db28ac468b1c762a`

## 5. On-chain Registration

- **Chain hash:** `0x00d0fdd305f43a1a10c38369366d2779d64125bff23cb0aec9b119f2da97ba45`
- **Chain tx hash:** `0x5193eaab0fb88ef9822da6dfd9451fa7a5ad78d3c661a5d9974375a8dffdad70`
- **Chain block:** `41554248`

---

## File Mapping

This bundle consists of: `L2-169-001.md`, `L2-169-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-169-001.md` | Source of truth — edit this | Human or LLM |
| `L2-169-001.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 `L2-169-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._