Perea Álvarez de Eulate, Martín2025-09-232025-09-232024Perea Álvarez De Eulate, M. A. (2024). The simplest method for the accurate determination of noon. European Journal of Physics, 45(5), 055603. https://doi.org/10.1088/1361-6404/ad60661361-64040143-0807https://hdl.handle.net/11268/16182In this paper, we present the simplest possible method for the precise determination of solar noon in mean solar time, based only on the value of the equation of time corresponding to a predetermined time for the observer, constant throughout the year. This represents a revolutionary simplification of the appendix of the universally known SPA (Solar Position Algorithm, NREL) regarding solar noon. Given that the proposed simple method does not entail a significant loss of precision, it is especially useful for university students or postgraduate students in photovoltaic/solar thermal energy or developers who wish to quickly calculate solar noon or create their own software for analysis or research. In addition, an interpolative procedure is presented to further enhance the precision of the method, although such improvement will not be necessary in the majority of cases.engjournal article10.1088/1361-6404/ad6066restricted accessModelo matemáticoEnergía solarMétodo científicoGoal 7: Ensure access to affordable, reliable, sustainable and modern energy