Results 301 to 310 of about 870,817 (352)
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2017
In Germany in 1904, Christian Hulsmeyer used a copy of Hertz’s apparatus to demonstrate the reception of radiation reflected from a ship, thereby introducing a first primitive version of radar, albeit without range information. In the early years of the twentieth century, the ingenious inventor Guglielmo Marconi (1874–1937) was instrumental in the ...
Jacob W. M. Baars, Hans J. Kärcher
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In Germany in 1904, Christian Hulsmeyer used a copy of Hertz’s apparatus to demonstrate the reception of radiation reflected from a ship, thereby introducing a first primitive version of radar, albeit without range information. In the early years of the twentieth century, the ingenious inventor Guglielmo Marconi (1874–1937) was instrumental in the ...
Jacob W. M. Baars, Hans J. Kärcher
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Radio-Astronomy and Navigation
The Journal of the Royal Aeronautical Society, 1958The difficulties of determining latitude and longitude under adverse weather conditions, when neither the Sun nor stars can be sighted, are well-known, and the advantages of a non-visual system of position finding which could operate through clouds or fog are too obvious to require emphasis.A Radio Sextant, which detects and locks-on to 8 mm. radiation
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Instrumentation for radio astronomy
Physics Today, 1966T HE WORLD'S FIRST radiotelescope designed specifically for astronomical observations was built in 1937, a few years after Karl Jansky's pioneering discovery of radio waves from the Milky Way. The radiotelescope was conceived by Grote Reber who built the instrument practically unaided in his own back yard at Wheatstone, Illinois. It consisted (figure 1)
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1989
The result of any measurement is a function not only of what one wants to measure but also of the system used to make the measurements. This is a thoroughly undesirable state of affairs because, in science, we demand that others can repeat experiments and come to the same conclusions.
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The result of any measurement is a function not only of what one wants to measure but also of the system used to make the measurements. This is a thoroughly undesirable state of affairs because, in science, we demand that others can repeat experiments and come to the same conclusions.
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Tools of Radio Astronomy and an Introduction to Radio Astronomy
Physics Today, 1998Thomas L. Wilson +4 more
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Signal Processing for Radio Astronomy
Handbook of Signal Processing Systems, 2018A. Veen, S. Wijnholds, A. M. Sardarabadi
semanticscholar +1 more source
1998
A brief history of the contribution of studies of discrete radio sources to cosmological research is presented. Particular emphasis is given to the identification of complete samples of radio sources and the determination of their spectra and redshifts. The evolutionary history of these objects with cosmic epoch can now be related to the star-formation
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A brief history of the contribution of studies of discrete radio sources to cosmological research is presented. Particular emphasis is given to the identification of complete samples of radio sources and the determination of their spectra and redshifts. The evolutionary history of these objects with cosmic epoch can now be related to the star-formation
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Surveying the reach and maturity of machine learning and artificial intelligence in astronomy
Wiley Interdisciplinary Reviews: Data Mining and Knowledge Discovery, 2020Christopher Fluke, C Jacobs
exaly