TY - RPRT AU - Zamorano Calvo, Jaime AU - Ruiz Carmona, Roque PY - 2013 UR - https://hdl.handle.net/20.500.14352/41452 AB - Twelve SQM-L night sky photometers have been calibrated to determine their internal precision and differences in response. Amateur astronomers around Spain, under the supervision of the Spanish Astronomical Society (SEA, Sociedad EspaƱola de... LA - eng KW - Astronomical observations KW - Photometers TI - Sky Quality Meter cross-calibration for the NixNox project TY - technical report ER -