Solar reflector, collecting window and heat storage

A structure optimized for solar daylighting or for solar heating comprising a linear trough located free standing above a ground surface that faces generally south, a window inset or overhang above a line of target windows which shields the windows from rain or snow and may serve as part of the structure's roof without substantially blocking sun's rays from the roof at the winter solstice, and a solar heated structure wherein a bottom of the line of target windows is located at least five feet above the ground as measured on the structure's outside and is located at least five feet above the ground as measured on the structure's inside, so as to avoid shining concentrated sunlight from the trough on small children and animals that may be near the target windows inside the structure or outside of the structure, the linear trough being covered with a water-impervious reflector surface in a shingled arrangement such that the bottom edge of each row of reflectors overlaps one or more lower reflector surfaces to prevent the incursion of water from rain and melting snow and ice behind horizon-facing or upward-facing reflector surfaces, and the linear trough further having at least two adjacently-mounted reflector surfaces on a substrate for support with one or more holes in a gap between the reflector surfaces to relieve wind pressure on the reflector surface and the linear trough having a linear trough with one or more reflector sections pivoting around a horizontal axis for seasonal refocusing.