Solar energy (2) CSP systems are also able to track the movement of the sun. The radiation they concentrate is used as a heat source for a conventional plant to produce heat or electricity [concentrating solar thermal (CST) systems] or is directed to PV surfaces to generate electrical power [concentrating PV (CPV) technology]. CSP allows solar installations to increase their productivity. CSP plants take up smaller areas, which helps to reduce costs. There are various concentrating technologies, the most prominent being the solar trough , the parabolic dish and the solar power tower. A notable and ambitious project is the solar power satellite: a system of solar collectors in space that would be directly exposed to the sun’s radiation and would transmit the generated power to a large antenna on the earth. The costs for the satellite’s construction, however, would be very high.