Synthetic aperture radar

Synthetic aperture radar (SAR) is a form of radar which is used to create images of objects, such as landscapes – these images can be either two or three dimensional representations of the object. SAR uses the motion of the radar antenna over a targeted region to provide finer spatial resolution than is possible with conventional beam-scanning radars. SAR is typically mounted on a moving platform such as an aircraft or spacecraft, and has its origins in an advanced form of side-looking airborne radar (SLAR). The distance the SAR device travels over a target in the time taken for the radar pulses to return to the antenna creates the large "synthetic" antenna aperture (the "size" of the antenna). As a rule of thumb, the larger the aperture is, the higher the image resolution will be, regardless of whether the aperture is physical (a large antenna) or 'synthetic' (a moving antenna) – this allows SAR to create high resolution images with comparatively small physical antennas.

Radar

Radar is an object-detection system that uses radio waves to determine the range, angle, or velocity of objects. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, weather formations, and terrain. A radar transmits radio waves or microwaves that reflect from any object in their path. A receive radar, which is typically the same system as the transmit radar, receives and processes these reflected waves to determine properties of the object(s).

Radar was secretly developed by several nations in the period before and during World War II. The term RADAR was coined in 1940 by the United States Navy as an acronym for RAdio Detection And Ranging. The term radar has since entered English and other languages as a common noun, losing all capitalization.

The modern uses of radar are highly diverse, including air and terrestrial traffic control, radar astronomy, air-defense systems, antimissile systems; marine radars to locate landmarks and other ships; aircraft anticollision systems; ocean surveillance systems, outer space surveillance and rendezvous systems; meteorological precipitation monitoring; altimetry and flight control systems; guided missile target locating systems; ground-penetrating radar for geological observations; and range-controlled radar for public health surveillance. High tech radar systems are associated with digital signal processing, machine learning and are capable of extracting useful information from very high noise levels.

Radar Online

RadarOnline.com is an American entertainment and gossip website that was first published as a print and online publication in September 2003 before becoming exclusively online. As of 2012 it is owned by the publisher American Media.

History

The magazine Radar, which published articles on entertainment, fashion, politics, and human interest, was founded and edited by Maer Roshan in September 2003. After a series of three test issues, he relaunched it in 2005 and again in 2006 with help from investors.Radar was awarded a General Excellence nomination by the American Society of Magazine Editors in 2007. Its website, RadarOnline.com, earned an audience of one million a month soon after it launched.

Despite its seeming success, the print magazine was suddenly shuttered in 2008, after its primary backer, billionaire Ron Burkle, who owned a substantial interest in Star and National Enquirer publisher American Media, withdrew. RadarOnline.com's founding staff was fired and replaced by reporters from the Enquirer and Star. RadarOnline.com was relaunched in March 2009 with a rebranding, focusing on celebrity items about gossip, fashion and pop culture. All of the articles previously published by RadarOnline.com were erased from the site.

Sonny Condell

Sonny Condell (born 1 July 1949, in Newtownmountkennedy, Ireland) is an Irish singer-songwriter, multi-instrumentalist, and graphic artist. He is mainly known as a member of the Irish bands Tír na nÓg and Scullion. He released some hits in Ireland as a solo artist like "Down In The City" in 1977 that he covered later with the Belgian singer Micha Marah on her album Voyage in 1998. For some years, Sonny has got his own solo band called Radar, although he still plays with Tír na nÓg and Scullion.

Discography

With Tramcarr 88

With Tír na nÓg

Solo

With Scullion