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Algorithm for the calculation of the horizontal coordinates of the Sun via spatial rotation matrices

Author

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  • Rapp-Arrarás, Ígor
  • Domingo-Santos, Juan M.

Abstract

This paper presents a new algorithm for calculating azimuth and altitude of the Sun from its ecliptic coordinates. The equations of the new procedure are not based on spherical trigonometry, like the procedure currently used for computing the solar vector, but on analytic geometry enriched by matrix algebra. Our proposal allows the horizontal coordinates of the Sun to be determined with a significantly higher computational efficiency than the classic algorithm without any loss in accuracy.

Suggested Citation

  • Rapp-Arrarás, Ígor & Domingo-Santos, Juan M., 2009. "Algorithm for the calculation of the horizontal coordinates of the Sun via spatial rotation matrices," Renewable Energy, Elsevier, vol. 34(3), pages 876-882.
    • Handle: RePEc:eee:renene:v:34:y:2009:i:3:p:876-882
    DOI: 10.1016/j.renene.2008.06.005
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    References listed on IDEAS

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    1. Sproul, Alistair B., 2007. "Derivation of the solar geometric relationships using vector analysis," Renewable Energy, Elsevier, vol. 32(7), pages 1187-1205.
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