# 📐  L2 Spec — Exoplanet Transit Photometry Inversion — Nominal + Mismatch Specs

**ID:** `L2-380-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-380`](/artifact/l1/L1-380)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.3 · **Delta tier:** 5
> **⛓ On-chain block:** 41555182

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| Cadence min | — | 0.5 – 30.0 |
| N transit points | — | 50 – 10000 |
| Snr per point ppm | — | 10 – 1000 |
| R p r star percent | — | 0.1 – 20.0 |

## 2. Tolerance (ε)

**Type:** `fn`

```
30 + 20 * (100 / SNR_per_point_ppm) ** 0.5
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.3 |
| Delta tier | 5 |

## 4. Fingerprint

`b64f55ac04cd219a0cc2f7de58dc94759984aca41cab3d2459fcea762fd950b9`

## 5. On-chain Registration

- **Chain hash:** `0xc9f57abdb7a4103f55f629bf6a07deb47cb861d5a6769435183490119ec0ba58`
- **Chain tx hash:** `0x0385eaf2e891d9061290173a2ddcbd5f04e3560dd51d19b7145af25e0ecba962`
- **Chain block:** `41555182`

---

## File Mapping

This bundle consists of: `L2-380-001.md`, `L2-380-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-380-001.md` | Source of truth — edit this | Human or LLM |
| `L2-380-001.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 `L2-380-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._