The present invention relates to a quasi-uniaxial solar trajectory tracking transit system including a canopy, a case, a first positioning ring, a second positioning ring and a positioning pole. The canopy is a transparent hemisphere marked with a graduation line indicating elevation angles. The first...http://www.google.fr/patents/US7832110?utm_source=gb-gplus-shareBrevet US7832110 - Quasi-uniaxial solar trajectory tracking transit system
Quasi-uniaxial solar trajectory tracking transit system
