part of the project comprises 100,000 antennas built across , also in the Murchison region, in the traditional lands of the Wajarri Aboriginal people. Bulldozers The site has been named , which means in the Wajarri language. Description The SKA will combine the signals received from thousands of small antennas spread over a distance of several thousand kilometres to simulate a single giant radio telescope capable of extremely high sensitivity and angular resolution, using a technique called aperture synthesis. Some of the sub-arrays of the SKA will also have a very large field-of-view (FOV), making it possible to survey very large areas of sky at once. One innovative development is the use of focal-plane arrays using phased-array technology to provide multiple FOVs. This will greatly increase the survey speed of the SKA and enable several users to observe different pieces of the sky simultaneously, which is useful for (e.g.) monitoring multiple pulsars. The combination of a very large FOV with high sensitivity means that the SKA will be able to compile extremely large surveys of the sky considerably faster than any other telescope. The combined SKA will provide a wide range of coverage, with Australia's Murchison Widefield Array providing low-frequency converage and South Africa's MeerKAT providing mid-frequency coverage. There will be continuous frequency coverage from 50 MHz to 14 GHz in the first two phases of its construction. Phase 1: Providing ~10% of the total collecting area at low and mid frequencies by 2023 (SKA1). Phase 2: Completion of the full array (SKA2) at low and mid frequencies by 2030. The frequency range from 50 MHz to 14 GHz, spanning more than two decades, cannot be realised using one design of antenna and so the SKA will comprise separate sub-arrays of different types of antenna elements that will make up the SKA-low, SKA-mid and survey arrays: SKA-low array: a phased array of simple dipole antennas to cover the frequency range from 50 to 350 MHz. These will be grouped in 40 m diameter stations each containing 256 vertically oriented dual-polarisation dipole elements. Stations will be arranged with 75% located within a 2 km diameter core and the remaining stations situated on three spiral arms, extending out to a radius of 50 km. SKA-mid array: an array of several thousand dish antennas (around 200 to be built in Phase 1) to cover the frequency range 350 MHz to 14 GHz. It