At the Operations Support Facility (OSF), the holography tower has been completed. This tower will be used for radio holography (a method to measure the distortion of the antenna reflector surface). All that is left to do is wait for the arrival of the transmitter and mount it on the tower. The picture shows the holography tower viewed from the office area. In the background, you can see the steel frames of the antenna assembly area for Vertex (the manufacturer of the North American antenna).