# 📐 L2 Spec — Hyperspectral Imaging (pushbroom / AVIRIS-style) Mismatch-Only Spec
**ID:** `L2-102-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-102`](/artifact/l1/L1-102)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41554200
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 128 – 8192 |
| W | px | 128 – 8192 |
| Gsd m | m | 1 – 1000 |
| Snr db | dB | 10.0 – 45.0 |
| N bands | bands | 32 – 500 |
| Spectral mixing | — | 0.0 – 0.3 |
| Smile distortion | — | 0.0 – 0.1 |
| Atmospheric water vapor | — | 0.0 – 0.3 |
## 2. Tolerance (ε)
**Type:** `fn`
```
22.0 + 0.2 * SNR_dB - 10.0 * atmospheric_water_vapor - 15.0 * smile_distortion
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |
## 4. Fingerprint
`25d9f27195cb8f7c3829b20dd8dc34afc2f954b6ad204548fa237c35bd9e5b3b`
## 5. On-chain Registration
- **Chain hash:** `0x58c921948536f132ad00b23da8c92c5e1436cbf56d0a11517ae8052192d4d7ce`
- **Chain tx hash:** `0x27b39a3b934cf36c0f033446394b43b30d71ad6b61984c9a4089c6f8b3cf37f2`
- **Chain block:** `41554200`
---
## File Mapping
This bundle consists of: `L2-102-001.md`, `L2-102-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-102-001.md` | Source of truth — edit this | Human or LLM |
| `L2-102-001.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 `L2-102-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._