# EMF Spectrum Explorer

> Interactive explorer of radio frequency allocations worldwide — national regulator tables for dozens of countries, FCC (United States), CEPT ECA, and ITU Radio Regulations Art. 5 regional baselines (Regions 1–3). Educational visualization inspired by the classic NTIA wall chart; not an official regulatory source.

EMF Spectrum Explorer is a progressive web app: pick a country or administration, scroll a log-scale chart from roughly 8.3 kHz to 3 THz, filter by radio service (NTIA-aligned colors), search or jump to a frequency (e.g. 915 MHz), and open band details (primary/secondary services and notable uses). UI chrome is available in English, Chinese (Simplified), Hindi, Spanish, Arabic, French, Bengali, Portuguese, Russian, and Indonesian.

Shareable URLs: locale path (`/es`, `/zh`; English at `/`), `?country=` (ISO admin), `?region=` (`ITU-R1`, `ITU-R2`, `ITU-R3`, `FCC`, `ECA`), and `?hz=` (e.g. `915MHz`, `2.4GHz`).

## Data sources

- [FCC Online Table of Frequency Allocations (47 CFR § 2.106)](https://www.ecfr.gov/current/title-47/chapter-I/subchapter-A/part-2/subpart-B/section-2.106): United States national table
- [NTIA U.S. Frequency Allocation Chart](https://www.ntia.gov/page/united-states-frequency-allocation-chart): Visual color reference for service categories
- [ITU Radio Regulations 2024, Article 5](https://www.itu.int/pub/R-REG-RR): Regional allocation baselines for ITU Regions 1, 2, and 3; also used when a national table is not bundled
- National / regional tables (bundled): CEPT ECA via EFIS, plus domestic regulators such as Ofcom, BNetzA, ANFR, ISED, ACMA, MIC, Anatel, IFT, and others — see the repository data-sources doc for the full registry

## Project

- [Source repository](https://github.com/jamesrobinson50/radio-spectrum): Code, bundled allocation JSON, and README
- [README](https://github.com/jamesrobinson50/radio-spectrum/blob/main/README.md): Install, data refresh scripts, and feature overview
- [Data sources](https://github.com/jamesrobinson50/radio-spectrum/blob/main/docs/data-sources.md): Dataset registry and licence notes
- [Full product brief](/llms-full.txt): Self-contained description for agents that prefer one document

## Optional

- [Web app](/): Interactive chart (JavaScript required; see llms-full.txt for a text summary)
- [Open Graph image](/og-image.jpg): Social preview artwork