A pulse-Doppler radar is a radar system that determines the range to a target using pulse-timing techniques, and uses the Doppler effect of the returned signal to determine the target object's velocity. It combines the features of pulse radars and continuous-wave radars, which were formerly separate due to the complexity of the electronics. The first operational Pulse Doppler radar was in the CIM-10 Bomarc, an American long range supersonic missile powered by ramjet engines, and which was armed with a W40 nuclear weapon to destroy entire formations of attacking enemy aircraft. Pulse-Doppler systems were first widely used on fighter aircraft starting in the 1960s. Earlier radars had used pulse-timing in order to determine range and the angle of the antenna (or similar means) to determine the bearing. However, this only worked when the radar antenna was not pointed down; in that case the reflection off the ground overwhelmed any returns from other objects. As the ground moves at the same speed but opposite direction of the aircraft, Doppler techniques allow the ground return to be filtered out, revealing aircraft and vehicles. This gives pulse-Doppler radars "look-down/shoot-down" capability. A secondary advantage in military radar is to reduce the transmitted power while achieving acceptable performance for improved safety of stealthy radar. Pulse-Doppler techniques also find widespread use in meteorological radars, allowing the radar to determine wind speed from the velocity of any precipitation in the air. Pulse-Doppler radar is also the basis of synthetic aperture radar used in radar astronomy, remote sensing and mapping. In air traffic control, they are used for discriminating aircraft from clutter. Besides the above conventional surveillance applications, pulse-Doppler radar has been successfully applied in healthcare, such as fall risk assessment and fall detection, for nursing or clinical purposes. (Wikipedia).
Solution to problems dealing with the Doppler effect.
From playlist Physics - Waves
Solution to problems dealing with the Doppler effect.
From playlist Physics - Waves
Explaining the Doppler effect. Worked problems.
From playlist Physics - Waves
Amazing science experiment-Demonstrating beat frequency
A beat is an interference pattern between two sounds of slightly different in frequencies You can download this app or a similar app on two devices and TRY it at home Enjoy!!!
From playlist Beats
Amazing science experiment-Demonstrating beat frequency
A beat is an interference pattern between two sounds of slightly different in frequencies You can download this app or a similar app on two devices and TRY it at home Enjoy!!!
From playlist Beats
A short animation of KCCI's dual pol Doppler radar. I put this together in Cinema 4D and After Effects.
From playlist KCCI Animations
Teach Astronomy - Doppler Effect
http://www.teachastronomy.com/ The Doppler Effect is the shift of wavelength or frequency of a source of waves due to the motion of that source of waves. Doppler Effect is most familiar in terms of sound waves. As a source of sound, such as a siren, approaches you, the pitch or frequency
From playlist 06. Optics and Quantum Theory
A beat is an interference pattern between two sounds of slightly different in frequencies You can download this app or a similar app on two devices and TRY it at home Enjoy!!!
From playlist Beats
Here is a demonstration of the doppler effect.
From playlist All Demonstrations
Vintage 1962: RADAR Applications: Tracking, Communication Technology (Training CRT SAGE Electronics)
Full, unedited documentary on RADAR Applications from 1962. This 40 minute training film provides excellent background and technical description of the invention and evolution of RADAR technologies. From its earliest use in wartime, to cold war installations integrated with the giant SAG
From playlist Airlines, Airports, Automated Ticket Reservation Systems
The more general uncertainty principle, regarding Fourier transforms
The meaning of the uncertainty principle in the context of Fourier transforms Help fund future projects: https://www.patreon.com/3blue1brown An equally valuable form of support is to simply share some of the videos. Special thanks to these supporters: http://3b1b.co/uncertainty-thanks For
From playlist Fourier
Speaker: Eric Blossom How to build your own radar system The lecture describes how to build your own passive radar system using relatively low-cost hardware and free software. The lecture describes how to build your own passive radar system using relatively low-cost hardware and free so
From playlist 22C3: Private Investigations
Learn how to spot storms and tornado. SkyWarn Hangout: https://www.youtube.com/watch?v=oe3i8vQvD8w SkyWarn Website: http://www.nws.noaa.gov/skywarn/ NOAA: http://weather.noaa.gov/radar/radinfo/radinfo.html CASA site: http://casa.ece.uprm.edu http://www.nsf.gov/news/special_reports/scie
From playlist Investigations A closer look at a topic
America's Most Iconic Fighter Jets | The West's Land-based Fighters & Bombers | Spark
This documentary features the West's most modern and powerful land-based fighters and bombers of the late 1980s. The program features Britain's Harrier, the Panavia Tornado ADV, the Sepecat Jaguar, Mirage 2000, Sweden's Saab Viggen, and Israel's Kfir fighter. From the USAF comes the B-52 S
From playlist Spark Top Docs
Introduction to Signal Processing
http://AllSignalProcessing.com for free e-book on frequency relationships and more great signal processing content, including concept/screenshot files, quizzes, MATLAB and data files. Introductory overview of the field of signal processing: signals, signal processing and applications, phi
From playlist Introduction and Background
GRCon21 - Interior Target Tracking Using Digital Communications Signals for Bistatic Radar ....
Interior Target Tracking Using Digital Communications Signals for Bistatic Radar with Gnu Radio presented by Todd K. Moon, Thomas Bradshaw, Mirelle Despain, Jacob H. Gunther at GNU Radio Conference 2021 Wireless communication systems employed in buildings (such as WiFi) can be used for bi
From playlist GRCon 2021
How does RADAR work? | James May Q&A | Head Squeeze
How does RADAR work? It's a bit like shouting very loudly at a cliff and waiting for the echo to come back to you. Whether you use rude words or not is completely up to you. RADAR is emitting a sound wave and waiting for the echo to come back to you. By timing the returning echo you can w
From playlist James May's Q&A
DEFCON 19: Build your own Synthetic Aperture Radar
Speaker: Michael Scarito Radar is used extensively by the military, police, weather, air travel, and maritime industries - why not you? Come learn how to build a radar imaging system on the cheap! This talk will explain the basics of how radar works as well as how to measure range and vel
From playlist DEFCON 19
GRCon21 - Channel Leakage Cancellation for Software Defined Radio (SDR) Narrowband Radar ...
Channel Leakage Cancellation for Software Defined Radio (SDR) Narrowband Radar Interferometry Using GNU Radio presented by Victor Cai and Jon Kraft at GNU Radio Conference 2021 Because the SDR has both an RF transmitter and a receiver integrated in the same module, leakage from transmit
From playlist GRCon 2021
We demonstrate the Doppler Effect where a traveling transmitter excites spherical waves in fixed time intervals. While a frequency increase in the direction of travel is observed, a reduction of frequency occurs in the opposite direction.
From playlist Electromagnetic Animations