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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 ...
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.
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 ...
In August 2021, a contract was signed with Saab to modernize the Gripen fleet of the Hungarian Air Force. The radar will be upgraded to PS-05/Mk4 and the software will be upgraded to MS 20 Block 2 level. New weapons would be added to the arsenal of the Hungarian Gripens. [211] The IRIS-T missiles have been ordered in December 2021. [212]
An NWS preliminary comparison of the tracks of the 2013 Moore tornado (red), the 1999 Bridge Creek–Moore tornado (green), and the 2003 Moore–Choctaw tornado (blue). On May 20, 2013, a prominent central upper trough moved eastward toward the Central United States, with a lead upper low pivoting over the Dakotas and Upper Midwest region.
July 20, 2024 at 6:30 AM. Nearly half of cancer deaths could be prevented with lifestyle changes, new research finds. An estimated 40% of all cancer cases and 44% of all cancer deaths in adults ...
New car prices fell 0.2% in July and 1.4% from the prior year. Compared to their peak in February 2022, prices paid for used vehicles are now down 19.4%. Used car prices rose more than 40% ...
Temperatures for individual cities on the primary forecast map and temperature lists are suffixed with a one- or two-letter code, such as "t" for thunderstorms, referencing the expected weather conditions. The colorized forecast map was created by staff designer George Rorick (who left USA Today for a similar position at The Detroit News in ...