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2. Continuous-wave radar - Wikipedia

   en.wikipedia.org/wiki/Continuous-wave_radar

   Continuous-wave radar (CW radar) is a type of radar system where a known stable frequency continuous wave radio energy is transmitted and then received from any reflecting objects. [1] Individual objects can be detected using the Doppler effect , which causes the received signal to have a different frequency from the transmitted signal ...

3. 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.

4. Pulse-repetition frequency - Wikipedia

   en.wikipedia.org/wiki/Pulse-repetition_frequency

   Pulse-repetition frequency (PRF) is the number of times a pulsed activity occurs every second. This is similar to cycle per second used to describe other types of waveforms. PRF is inversely proportional to time period which is the property of a pulsed wave. PRF is usually associated with pulse spacing, which is the distance that the pulse ...

5. Inverse synthetic-aperture radar - Wikipedia

   en.wikipedia.org/wiki/Inverse_synthetic-aperture...

   Inverse synthetic-aperture radar ( ISAR) is a radar technique using radar imaging to generate a two-dimensional high resolution image of a target. It is analogous to conventional SAR, except that ISAR technology uses the movement of the target rather than the emitter to create the synthetic aperture. [1] ISAR radars have a significant role ...

6. News, Politics, Sports, Mail & Latest Headlines - AOL.com

   homepage.aol.com

   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

7. Weather - Wikipedia

   en.wikipedia.org/wiki/Weather

   Weather is the state of the atmosphere, describing for example the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy. [ 1] On Earth, most weather phenomena occur in the lowest layer of the planet's atmosphere, the troposphere, [ 2][ 3] just below the stratosphere. Weather refers to day-to-day temperature ...

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   www.aol.com/lifestyle/coach-outlets-massive...

   There's nothing like a new purse or pair of shoes to add a spring to your step. After all, when you look good you feel good. That's why Coach Outlet's latest sale is one worth taking a peek at ...

9. Saab JAS 39 Gripen - Wikipedia

   en.wikipedia.org/wiki/Saab_JAS_39_Gripen

   The Saab JAS 39 Gripen ( IPA: [ˈɡrǐːpɛn] pronunciation ⓘ; English: The Griffin) [ Nb 1][ 3] is a light single-engine supersonic multirole fighter aircraft manufactured by the Swedish aerospace and defence company Saab AB. The Gripen has a delta wing and canard configuration with relaxed stability design and fly-by-wire flight controls.