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  2. Synthetic-aperture radar - Wikipedia

    en.wikipedia.org/wiki/Synthetic-aperture_radar

    Synthetic-aperture radar (SAR) is a form of radar that is used to create two-dimensional images or three-dimensional reconstructions of objects, such as landscapes. [1] SAR uses the motion of the radar antenna over a target region to provide finer spatial resolution than conventional stationary beam-scanning radars.

  3. Wallpaper (computing) - Wikipedia

    en.wikipedia.org/wiki/Wallpaper_(computing)

    A computer screen showing a background wallpaper photo of the Palace of Versailles A wallpaper from fractal. A wallpaper or background (also known as a desktop background, desktop picture or desktop image on computers) is a digital image (photo, drawing etc.) used as a decorative background of a graphical user interface on the screen of a computer, smartphone or other electronic device.

  4. Macintosh 128K - Wikipedia

    en.wikipedia.org/wiki/Macintosh_128K

    Macintosh 128K. The Macintosh, later rebranded as the Macintosh 128K, is the original Macintosh personal computer from Apple. It is the first successful mass-market all-in-one desktop personal computer with a graphical user interface, built-in screen and mouse. It was pivotal in establishing desktop publishing as a general office function.

  5. History of radar - Wikipedia

    en.wikipedia.org/wiki/History_of_radar

    The system, Japan's first full Radio Range Finder (RRF – radar), was designated Mark 1 Model 1. Contracts were given to three firms for serial production; NEC built the transmitters and pulse modulators, Japan Victor the receivers and associated displays, and Fuji Electrical the antennas and their servo drives.

  6. Long Range Discrimination Radar - Wikipedia

    en.wikipedia.org/.../Long_Range_Discrimination_Radar

    Frequency. S band. Other Names. Long Range Discrimination Radar (LRDR) The Long Range Discrimination Radar (LRDR) in Alaska is part of the United States's Ground-Based Midcourse Defense anti-ballistic missile system. The main contractor is Lockheed Martin, under a US$ 784 million contract from the Missile Defense Agency in October 2015. [1]

  7. Radar - Wikipedia

    en.wikipedia.org/wiki/Radar

    Radar is a system that uses radio waves to determine the distance (ranging), direction (azimuth and elevation angles), and radial velocity of objects relative to the site. It is a radiodetermination method [1] used to detect and track aircraft, ships, spacecraft, guided missiles, motor vehicles, map weather formations, and terrain.

  8. Over-the-horizon radar - Wikipedia

    en.wikipedia.org/wiki/Over-the-horizon_radar

    Over-the-horizon radar (OTH), sometimes called beyond the horizon radar (BTH), is a type of radar system with the ability to detect targets at very long ranges, typically hundreds to thousands of kilometres, beyond the radar horizon, which is the distance limit for ordinary radar. Several OTH radar systems were deployed starting in the 1950s ...

  9. NEXRAD - Wikipedia

    en.wikipedia.org/wiki/NEXRAD

    NEXRAD or Nexrad (Next-Generation Radar) is a network of 159 high-resolution S-band Doppler weather radars operated by the National Weather Service (NWS), an agency of the National Oceanic and Atmospheric Administration (NOAA) within the United States Department of Commerce, the Federal Aviation Administration (FAA) within the Department of Transportation, and the U.S. Air Force within the ...