Dawn Time — The instant if the upper edge of the solar disk will become visible around the horizon. This parameter depends on quite a few factors, like The placement and height of the observer previously mentioned sea level, the presence of hurdles around the horizon (mountains, homes), atmospheric refraction, http://digitaledemonen.nl/de-ultieme-gids-voor-het-kiezen-van-de-juiste-opstalverzekering-voor-uw-eigendom/