# 📐  L2 Spec — Receiver Function — teleseismic crust imaging Mismatch-Only Spec

**ID:** `L2-275-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-275`](/artifact/l1/L1-275)

> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.48 · **Delta tier:** 5
> **⛓ On-chain block:** 41554054

---

## 1. Domain Ω

**Type:** `range`

| Parameter | Unit | Range |
|---|---|---|
| Snr db | dB | 0 – 40 |
| N events | — | 5 – 1000 |
| Bg noise | — | 0.0 – 0.5 |
| N samples | — | 128 – 65536 |
| Bandwidth error | — | 0.0 – 0.3 |
| P slowness error | — | 0.0 – 0.05 |
| Multiples contamination | — | 0.0 – 0.3 |

## 2. Tolerance (ε)

**Type:** `fn`

```
16.0 + 0.3*SNR_dB - 50.0*p_slowness_error - 10.0*bandwidth_error - 6.0*bg_noise - 8.0*multiples_contamination
```

## 3. Difficulty

| Property | Value |
|---|---|
| Difficulty score | 0.48 |
| Delta tier | 5 |

## 4. Fingerprint

`7851c9d967ac166ccf555793a6ea86dd7c7624b92cabf7302a7700f12c674003`

## 5. On-chain Registration

- **Chain hash:** `0xbee8a337d7aef54d11fbe62c4cd9f1e5e6d0bebca993cc767d794eea305b06d0`
- **Chain tx hash:** `0xac4e7246e5f6888281e8cb4d3ab4496535f67ff2d6adbd534b7b54460ac7d09e`
- **Chain block:** `41554054`

---

## File Mapping

This bundle consists of: `L2-275-001.md`, `L2-275-001.json`.

| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-275-001.md` | Source of truth — edit this | Human or LLM |
| `L2-275-001.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 `L2-275-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._