aric/nrel-spa-dart
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nrel-spa-dart/.github/docs/CHANGELOG.md

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Changelog

[1.0.0] - 2026-03-08

Added

  • getSpa() computes solar position for any date and location
  • Custom zenith angle support for twilight calculations
  • Full NREL SPA algorithm (Reda & Andreas, 2004)
  • Accuracy: ±0.0003° for solar zenith angle
  • Valid range: years -2000 to 6000
  • Zero external dependencies