is expected that the antenna design will follow that of the Allen Telescope Array using an offset Gregorian design having a height of 15 metres and a width of 12 metres. SKA-survey array: a compact array of parabolic dishes of 12–15 meters diameter each for the medium-frequency range, each equipped with a multi-beam, phased array feed with a large field of view and several receiving systems covering about 350 MHz – 4 GHz. The survey sub-array was removed from the SKA1 specification following a "rebaselining" exercise in 2015. The area covered by the SKA – extending out to ~3000 km – will comprise three regions: A central region containing about 5 km diameter cores of SKA-mid antennas (South Africa) and SKA-low dipoles (Western Australia). These central regions will contain approximately half of the total collecting area of the SKA arrays. A mid region extending out to 180 km. This will contain dishes and pairs of SKA-mid and SKA-low stations. In each case they will be randomly placed within the area with the density of dishes and stations falling off towards the outer part of the region. An outer region from 180 km to 3000 km. This will comprise five spiral arms, along which dishes of SKA-mid, grouped into stations of 20 dishes, will be located. The separation of the stations increases towards the outer ends of the spiral arms. Costs The SKA was estimated to cost €1.8 billion in 2014, including €650 million for Phase 1, which represented about 10% of the planned capability of the entire telescope array. There have been numerous delays and rising costs over the nearly 30-year history of the intergovernmental project. , the whole project was reported to be worth around A$3 billion. Members In February 2021, the members of the SKAO consortium were: Australia: Department of Industry and Science Canada: National Research Council China: National Astronomical Observatories of the Chinese Academy of Sciences France: French National Centre for Scientific Research Germany: Max-Planck-Gesellschaft India: National Centre for Radio Astrophysics Italy: National Institute for Astrophysics Portugal: Portugal Space South Africa: National Research Foundation Spain: Institute of Astrophysics of Andalusia Sweden: Onsala Space Observatory Switzerland: École Polytechnique Fédérale de Lausanne The Netherlands: Netherlands Organisation for Scientific Research United Kingdom: Science and Technology Facilities Council , there were 16 countries involved in the project. SKA locations The headquarters of the SKA are located at the University of Manchester's