Each of these mirrors has a surface measuring 120 square meters ( 1,290 square feet ) that concentrates the Sun 's rays to the top of a 115 meter ( 377 foot ) high tower where a solar receiver and a steam turbine are located . Each of these mirrors has a surface measuring 120 square meters ( 1,290 square feet ) that concentrates the Sun 's rays to the top of a 115 meter ( 377 feet ) high tower where a solar receiver and a steam turbine are located .