Results 201 to 210 of about 888,183 (252)

The Australian radio-telescope

Astrophysics and Space Science, 1986
A large synthesis radio telescope is under construction in Australia at a cost of $A 30.7million. In comprises a 6 km-long ‘compact array’ of 22 m antenna at Culgoora and a ‘long baseline array’ of 319 km, achieved by adding another 22 m antenna near Coonabarabran and the existing 64 m antennae at Parkes.
openaire   +1 more source

Radio Telescopes

2013
© Springer Science+Business Media Dordrecht 2013.Radio Telescopes starts with a brief historical introduction from Jansky’s1931 discovery of radio emission from the Milky Way through the development ofradio telescope dishes and arrays to aperture synthesis imaging.
Ekers, Ronald, Wilson, T.
openaire   +2 more sources

Prism beamswitch for radio telescopes

Review of Scientific Instruments, 1978
A dielectric prism and switching mechanism have been constructed for beamswitching a Cassegrain radio telescope. Spatially extended radio sources may be mapped without significant confusion utilizing the sensitivity and stability inherent in the conventional Dicke radiometer.
J M, Payne, B L, Ulich
openaire   +2 more sources

Radio Telescope

Physics Today, 1961
Plans to construct a new radio telescope, perhaps as large as 250 feet in diameter, were disclosed recently by the National Aeronautics and Space Administration to the Senate Aeronautical and Space Science Committee. A request for funds to start construction of the facility, to be located at Goldstone, Calif., was included in a tentative NASA budget ...
openaire   +1 more source

Radio telescope for millimeter wavelengths.

Journal of Spacecraft and Rockets, 1964
A 16-ft-diam radio telescope has been built to operate at frequencies up to 140 Gc (2.15-mm wavelength). The expected gain at 140 Gc is 72.5 db. Measured gain at 70 Gc is greater than 67.8 db with a beamwidth of 3.7 min of arc. The parabolic reflector comprises Invar honeycomb panels supported by a welded Invar truss; its surface is precision-swept ...
R. FISHER, H. HOARD, F. ONIANS
openaire   +1 more source

Radio Astronomy and Radio Telescopes

2010
An astronomical object somewhere in the Planetary System, the Galaxy, a Cluster of Galaxies, or far out in the Universe may generate radio waves by one or the other physical process (a topic of Astrophysics). If the radio emission is generated inside the object, some of the radio waves propagate through the object until they may leave the radio source ...
Albert Greve, Michael Bremer
openaire   +1 more source

Introduction to Radio Astronomy and Radio Telescopes

2020
Radio astronomy studies the physics and chemistry of cosmic sources and cosmic phenomena at the radio wave spectrum. Radio telescopes are built to detect radiation within this spectrum. This chapter provides a historical walkthrough on the development of radio astronomy and radio telescopes.
Kim Ho Yeap, Kazuhiro Hirasawa, Humaira Nisar   +2 more
openaire   +1 more source

Radio Telescope

Physics Today, 1963
The new 150-foot radio telescope of the Air Force Cambridge Research Laboratories Sagamore Hill Radio Astronomy Observatory at Hamilton, Mass., is reported in partial operation. The reflector, which was placed on its supporting towers last September, is capable of motion in the horizontal plane and is now being used to view radio sources as they rise ...
openaire   +1 more source

Radio-Telescope Antenna Parameters

IEEE Transactions on Military Electronics, 1964
Principal antenna parameters which are useful in characterizing the electrical performance of radio-telescope antennas are defined and the relations between them are established. The application of these parameters to radio astronomical measurements is discussed.
openaire   +1 more source

Diversions of a radio telescope

Notes and Records of the Royal Society, 2008
The first use of the 250-foot radio telescope at Jodrell Bank, an instrument designed for academic research, was as a radar, when it obtained echoes from the rocket launcher of Sputnik 1 in October 1957. It was soon realized that this was the only radar system capable of detecting intercontinental missiles soon after their launch from within the USSR ...
Sir Francis Graham-Smith, Sir Bernard Lovell   +1 more
openaire   +1 more source