radio-frequency sky map
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Radio — is the transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light.Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of… … Wikipedia
BBC Radio Lincolnshire — Infobox Radio Station name = BBC Radio Lincolnshire city = Lincoln area = Lincolnshire branding = slogan = airdate = November 11, 1980 frequency = 94.9 MHz, 104.7 MHz, 1368 kHz share = 14% share as of = July 2008 share source =… … Wikipedia
Mathematics of radio engineering — A complex valued function. The mathematics of radio engineering is a pleasant and very useful subject. This article is an attempt to provide a reasonably comprehensive summary of this almost limitless topic. While the ideas have historically… … Wikipedia
Grote Reber — (December 22, 1911 ndash; December 20, 2002), was an amateur astronomer and pioneer of radio astronomy. He was instrumental investigating and extending Karl Jansky s pioneering work, and conducted the first sky survey in the radio… … Wikipedia
Mauritius Radio Telescope — The Mauritius Radio Telescope (MRT) is a synthesis radio telescope that is used to make images of the sky at a frequency of 151.5 MHz. The MRT was primarily designed to make a survey with a point source sensitivity of 150 mJy. Its resolution is… … Wikipedia
BBC Radio Northampton — Infobox Radio Station name = BBC Radio Northampton city = Northampton area = Northamptonshire branding = slogan = airdate = June 16, 1982 frequency = 104.2 MHz, 103.6FM share = 9.8% share as of = March 2008 share source =… … Wikipedia
Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… … Universalium
Cosmic microwave background radiation — CMB and Cosmic background radiation redirect here. For other uses see CMB (disambiguation) and Cosmic background (disambiguation). Physical cosmology … Wikipedia
Wilkinson Microwave Anisotropy Probe — WMAP redirects here. WMAP may also refer to either radio station WXNC or WGSP FM. Wilkinson Microwave Anisotropy Probe General information NSSDC ID 2001 027A … Wikipedia
Radar — For other uses, see Radar (disambiguation). A long range radar antenna, known as ALTAIR, used to detect and track space objects in conjunction with ABM testing at the Ronald Reagan Test Site on Kwajalein Atoll … Wikipedia
History of radar — The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metallic objects. This possibility was suggested in James Clerk Maxwell s seminal work on electromagnetism.… … Wikipedia
