# 📐 L2 Spec — Multispectral Imaging (Landsat/Sentinel-2) Mismatch-Only Spec
**ID:** `L2-103-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-103`](/artifact/l1/L1-103)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.5 · **Delta tier:** 5
> **⛓ On-chain block:** 41554200
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 256 – 16384 |
| W | px | 256 – 16384 |
| Gsd m | m | 0.3 – 1000 |
| Snr db | dB | 15.0 – 45.0 |
| N bands | bands | 3 – 20 |
| Cloud contamination | — | 0.0 – 0.5 |
| Bidirectional reflectance | — | 0.0 – 0.2 |
| Atmospheric correction error | — | 0.0 – 0.2 |
## 2. Tolerance (ε)
**Type:** `fn`
```
25.0 + 0.2 * SNR_dB - 12.0 * atmospheric_correction_error - 10.0 * cloud_contamination
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.5 |
| Delta tier | 5 |
## 4. Fingerprint
`a8d101107a935b14550ffcf78fe5d89bc17822458734e3acbccb18ddc34b01b8`
## 5. On-chain Registration
- **Chain hash:** `0x6b14dade36acd315f180d5ce80f4503d6beb0d90abafd6f7e75692561ef29d6f`
- **Chain tx hash:** `0xa3db090ba94d2784ad42fcf5ab52a1e8de444590b1e8fa336c9209fb6ebe3209`
- **Chain block:** `41554200`
---
## File Mapping
This bundle consists of: `L2-103-001.md`, `L2-103-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-103-001.md` | Source of truth — edit this | Human or LLM |
| `L2-103-001.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 `L2-103-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._