... This general purpose enclosure offers access to the sky for several small instruments. Its truss roof rolls back on the steel I-beams and tracks that extend to the north of the building. A chain drive attached to the underside of the trusses provides the power that makes opening the observatory simple. ... The building is on a concrete pad originally intended for a student radio telescope, and it is serviced by a convenient cable trough that provides power and network from the main building. ...