https://en.wikipedia.org/wiki/Canadian_Hydrogen_Intensity_Mapping_Experiment
The Canadian Hydrogen Intensity Mapping Experiment (CHIME) is an interferometric radio telescope at the Dominion Radio Astrophysical Observatory in British Columbia, Canada which consists of four 100 × 20 metre semi-cylinders (roughly the size and shape of snowboarding half-pipes) populated with 1024 radio receivers sensitive at 400–800 MHz. The telescope’s low-noise amplifiers are built with components adapted from the cellphone industry and its data are processed using a 1000-processor high-performance GPGPU cluster……
……The choice to use a few elongated reflectors rather than many circular dishes is unusual but not original to CHIME: other examples of semi-cylindrical telescopes are the Molonglo Observatory Synthesis Telescope in Australia and the Northern Cross Radio Telescope in Italy. This design was chosen for CHIME as a cost-effective way of arranging close-packed radio antennas so that the telescope can observe the sky at a wide range of angular scales. Using multiple, parallel semi-cylinders gives comparable resolution along both axes of the telescope.
The antennas are custom-designed for CHIME to have good response in the 400 to 800 MHz range in two linear polarisations. Signal from the antennas are amplified in two stages that make use of technology developed by the cell-phone industry. This allows CHIME to keep the analogue chain at relatively low noise while still being affordable.
CHIME is operated as a correlator, meaning that the inputs from all the antennas are combined so that the entire system operates as one system. This requires considerable computing power. The analogue signals are digitised at 800 MHz and processed using a combination of custom-programmed field-programmable gate arrays (FPGA) and graphics processing units (GPU). The Pathfinder has a fully functional correlator made from these units, and has demonstrated that consumer-grade GPU technology provides sufficient processing power for CHIME at a fraction of the price of other radio correlators
