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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 ...
[18] [19] [20] Twinkies, an American snack cake generally considered to be "junk food", have a shelf life of around 25 days, despite the common claim (usually facetious) that they remain edible for decades. [21] The official shelf life is 45 days. Twinkies normally remain on a store shelf for 7 to 10 days. [22]
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.
v. t. e. Hurricane Katrina was a devastating and deadly Category 5 Atlantic hurricane that caused 1,392 fatalities and damages estimated at $186.3 billion (2022 USD) in late August 2005, particularly in the city of New Orleans and its surrounding area. [ 1 ] Katrina was the twelfth tropical cyclone, the fifth hurricane, and the third major ...
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Part of a series on Self-driving cars & self-driving vehicles Enablers Assured clear distance ahead Autonomous racing Datasets History Impact Lane centering Pedestrian crash avoidance mitigation Vehicle infrastructure integration Topics Automatic parking Platoon Regulation Liability Robotaxi Self-driving truck Tunnel problem Related topics Automatic train operation Unmanned surface vehicle ...
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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 ...
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