RT Report T1 NixNox procedure to build Night Sky Brightness maps from SQM photometers observations A1 Zamorano Calvo, Jaime A1 Sánchez De Miguel, Alejandro A1 Nievas Rosillo, Mireia A1 Tapia Ayuga, Carlos AB The NixNox procedure to build all-sky maps of the nocturnal night sky brightness using SQM photometers is described. Astronomers belonging to amateur associations in Spain are using this observational method to obtain data of their preferred sites of observation to characterize the astronomical quality of the sky and the sources of light pollution. YR 2014 FD 2014 LK https://hdl.handle.net/20.500.14352/41603 UL https://hdl.handle.net/20.500.14352/41603 LA eng NO Comunidad de Madrid NO Ministerio de Ciencia e Innovación (España) NO Sociedad Española de Astronomía NO Universidad Complutense de Madrid DS Docta Complutense RD 21 dic 2025