RT Journal Article T1 Increasing the Resolution and Spectral Range of Measured Direct Irradiance Spectra for PV Applications A1 López Rodríguez, Gabriel A1 Gueymard, Christian A. A1 Polo, Jesús A1 Alonso-Montesinos, Joaquín A1 Marzo, Aitor A1 Martín Chivelet, Nuria A1 Ferrada, Pablo A1 Escalona Llaguno, Martha Isabel A1 Batlles, Francisco J. AB The spectral distribution of the solar irradiance incident on photovoltaic (PV) modules is akey variable controlling their power production. It is required to properly simulate the productionand performance of PV plants based on technologies with different spectral characteristics. Spectroradiometerscan only sense the solar spectrum within a wavelength range that is usually too shortcompared to the actual spectral response of some PV technologies. In this work, a new methodologybased on the Simple Model of the Atmospheric Radiative Transfer of Sunshine (SMARTS) spectralcode is proposed to extend the spectral range of measured direct irradiance spectra and to increase thespectral resolution of such experimental measurements. Satisfactory results were obtained for bothclear and hazy sky conditions at a radiometric station in southern Spain. This approach constitutesthe starting point of a general methodology to obtain the instantaneous spectral irradiance incidenton the plane of array of PV modules and its temporal variations, while evaluating the magnitude andvariability of the abundance of atmospheric constituents with the most impact on surface irradiance,most particularly aerosols and water vapor. PB MDPI SN 2072-4292 (electrónico) YR 2023 FD 2023-03 LK https://hdl.handle.net/10272/22160 UL https://hdl.handle.net/10272/22160 LA eng NO López, G., Gueymard, C. A., Polo, J., Alonso-Montesinos, J., Marzo, A., Martín-Chivelet, N., Ferrada, P., Escalona-Llaguno, M. I., & Batlles, F. J. (2023). Increasing the Resolution and Spectral Range of Measured Direct Irradiance Spectra for PV Applications. In Remote Sensing (Vol. 15, Issue 6, p. 1675). MDPI AG. https://doi.org/10.3390/rs15061675 NO This research was supported by the Spanish Ministry of Economy, Industry, and Competitiveness [project PVCastSOIL Nº ENE2017-83790-C3-1-2-3-R], in collaboration with the European Regional Development Fund. Also, the Authors want to acknowledge the project MAPV Spain, with reference PID2020-118239RJ-I00, financed by the Ministerio de Ciencia e Innovación, and co-financed by the European Regional Development Fund. A. Marzo thanks for the Ramón y Cajal contract (RYC2021-031958-I), funded by the Spanish Ministerio de Ciencia e Innovación MCIN/AEI/10.13039/501100011033 and by the European Union “NextGenerationEU/PRTR”. Authors also acknowledge ANID/FONDAP/15110019 “Solar Energy Research Center”, SERC-Chile. DS Repositorio Institucional de la Universidad de Huelva RD 31 may 2026