Dawn Time — the moment when the upper edge of the photo voltaic disk becomes visible about the horizon. This parameter depends upon lots of things, like The placement and peak of the observer earlier mentioned sea level, the presence of road blocks over the horizon (mountains, homes), atmospheric refraction, http://digitaledemonen.nl/de-ultieme-gids-voor-het-kiezen-van-de-juiste-opstalverzekering-voor-uw-eigendom/