## nrel-spa

**[Home](Home)**

**Guides**
- [Quick Start](guides/quickstart)
- [Advanced Usage](guides/advanced)

**API**
- [getSpa](api/getSpa)
- [calcSpa](api/calcSpa)
- [formatTime](api/formatTime)
- [SpaOptions](api/SpaOptions)
- [SpaFunctionCode](api/SpaFunctionCode)

**Reference**
- [API Reference](API-Reference)
- [Architecture](Architecture)
- [NREL SPA Algorithm](NREL-SPA-Algorithm)

**Deep Dives**
- [Implementation Comparison](Implementation-Comparison)
- [Twilight Calculations](Twilight-Calculations)
- [Benchmarks](benchmarks/index)

**Examples**
- [Solar Position Logger](examples/solar-position)
- [Twilight Times](examples/twilight-times)

**Contributing**
- [Contributing](Contributing)
- [Code of Conduct](CODE_OF_CONDUCT)
- [Security](SECURITY)

**Links**
- [npm](https://www.npmjs.com/package/nrel-spa)
- [GitHub](https://github.com/acamarata/nrel-spa)
- [Changelog](https://github.com/acamarata/nrel-spa/blob/main/CHANGELOG.md)