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The largest parabolic dish antenna in the world is the Five-hundred-meter Aperture Spherical radio Telescope in southwest China, which has an effective aperture of about 300 meters. The gain of this dish at 3 GHz is roughly 90 million, or 80 dBi.
The Giant Metrewave Radio Telescope (GMRT), located near Narayangaon, Pune in India, is an array of thirty fully steerable parabolic radio telescopes of 45 metre diameter, observing at metre wavelengths. It is the largest and most sensitive radio telescope array in the world at low frequencies. [1]
313 parabolic antennas for detection of coronal mass ejection events. Operations started in 2023. [21] Mingantu interplanetary scintillation telescope: Inner Mongolia, China 327 MHz and 654 MHz [22] interplanetary scintillation telescope, consists of three rotatable cylindrical antennas (140 metres by 40 metres each). [23]
The Arecibo Observatory, also known as the National Astronomy and Ionosphere Center (NAIC) and formerly known as the Arecibo Ionosphere Observatory, is an observatory in Barrio Esperanza, Arecibo, Puerto Rico owned by the US National Science Foundation (NSF).
Originally constructed as a 64 m dish in 1973 and enlarged in 1987. It is the largest steerable parabolic antenna in the Southern Hemisphere. It is used by NASA to communicate with Voyager 2; the only antenna remaining on Earth capable to do so. [8] The antenna weighs more than 3000 tonnes and rotates on a film of oil approximately 0.17mm thick.
The Arecibo Telescope was a 305 m (1,000 ft) spherical reflector radio telescope built into a natural sinkhole at the Arecibo Observatory located near Arecibo, Puerto Rico.A cable-mount steerable receiver and several radar transmitters for emitting signals were mounted 150 m (492 ft) above the dish.
The first antenna was put into place in September 1975 and the complex was formally inaugurated in 1980, after a total investment of US$78,500,000 (equivalent to $290,000,000 in 2023). [9] It was the largest configuration of radio telescopes in the world.
The larger 29.8m parabolic dish antenna was commissioned in late 1969. The OTC Satellite Earth Station Carnarvon , an Earth station in Australia , was established to meet the need for more reliable and higher quality communications for the Apollo program .
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