Annual compounds of stable and cloud-free lights, formed from all the daily images available during the year 1998 of the satellites “Defense Meteorologycal Satellite Program” (DMSP) taken by the sensor “Operational Linescan System” (OLS) and that have no problems of resolution. In cases where more than one satellite collects data during this year, there are compounds from each satellite. Images that are illuminated by the sun or glare, those that are illuminated by the Moon and those that are illuminated by the aurora are excluded from the compound. The images have pixels sampled at 100 m and are from the Iberian Peninsula and Andalusia.
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