Computer Science – Sound
Scientific paper
May 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mijo...25..111w&link_type=abstract
Microwave Journal, vol. 25, May 1982, p. 111, 112, 114 (4 ff.).
Computer Science
Sound
Ionospheric Sounding, Radar Antennas, Radar Measurement, Radar Reception, Radar Transmission, Antenna Feeds, Ground Stations, Klystrons, Microwave Amplifiers, Waveguide Antennas
Scientific paper
The design, construction, and performance characteristics of an ionospheric sounding radar with a 1000-foot diameter (20 acre) antenna built at Arecibo are reviewed. The Arecibo Observatory facility can be used as a radar with transmission and reception at both 430 and 2380 MHz. The CW S-band transmitter consists of a Varian klystron with 2.5 MW peak, 450 kW average power capability. A dual channel receiver uses a maser amplifier. The UHF radar transmitter, employing two klystrons for 2.5 MW peak, 150 average power, is located in the ground station adjacent to the antenna, and the microwave energy is supplied to the feed structure via a waveguide line. The Arecibo antenna beamwidth is about 0.05 deg at 1420 MHz, with a solid angle about 0.002 square degrees; the instrument can easily detect a galaxy like the Milky Way at a distance of 700 million light years.
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