Excerpts from a report in the New York Times: Sunlight on Summer Solstice Will Light Up Fulton Center Hub
For nearly three hours on the summer solstice, a structure in the center known as the Sky Reflector-Net will send rays of light about 40 feet below sidewalk level to recesses on the lowest level. Look closely at the circular skylight in the atrium and you will see a series of arcs formed by 88 glass blades. The angle of each blade has been calibrated to direct sunlight down to the concourses at certain hours of the day and times of the year. As a poetic bonus, the patterns trace the sun's route through the sky, said Zak Kostura, a structural engineer at Arup. The shallower arcs express the trajectory of its wintertime journey; the longer arcs express its summertime path. Furthermore, a straight line drawn through the apogees of the arcs exactly describes a true north-south axis - something that lower Broadway does not do. "We've always looked at this as a kind of calendar, a seasonal thing," said Richard Kress, the design director at James Carpenter Design Associates. http://www.nytimes.com/2015/06/18/nyregion/sunlight-on-summer-solstice-will-light-up-fulton-center-hub.html
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