Cloud cover (also known as cloudiness, cloudage, or cloud amount) refers to the fraction of the sky obscured by clouds
when observed from a particular location. This CCF sensor is for measurement of the Cloud Cover Factor. This innovation
of Dr. Sten Lofveng makes it possible to get automatic observations of the Cloud Cover Factor, CCF 24 hours a day i.e. the
fraction of the sky that is covered with clouds. It consists of a day time unit that observes the sky in 4 directions in parts
of the solar spectrum, a night time unit that observes the sky in the thermal infra-red spectrum. A microcomputer
evaluates the signals and controls the output.