The radar horizon is a critical area of performance for aircraft detection systems that is defined by the distance at which the radar beam rises enough above the Earth's surface to make detection of a target at low level impossible. It is associated with the low elevation region of performance, and its geometry depends on terrain, radar height, and signal processing. This is associated with the notions of radar shadow, the clutter zone, and the clear zone. Airborne objects can exploit the radar shadow zone and clutter zone to avoid radar detection by using a technique called nap-of-the-earth navigation. (Wikipedia).
Apollo 12 on the Ocean of Storms
Ultra high-resolution photos of this historic second manned mission to the moon, including breathtaking photos of the lunar surface. Credit NASA.
From playlist Earth And Its Moon
Astronomy - Ch. 2: Understanding the Night Sky (5 of 23) Understanding the Celestial Sphere
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain what is the celestial sphere (a sort of GPS of the universe).
From playlist ASTRONOMY 2 THE NIGHT SKY
Radar Movies Highlight Asteroid 1998 QE2 and Its Moon
Radar data depicting the asteroid's primary body. Its moon, or secondary body, is the bright dot ascending just to the left of image center.
From playlist Asteroid and Comet Watch
月周回衛星「かぐや」のHDTVが観測した雨の海と虹の入り江 (C) JAXA/NHK
From playlist Earth's place in Solar System - Jaxa
Astronomy - Ch. 6: Telescopes (17 of 21) Radio Telescopes (The Beginning)
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the beginnings of the radio telescopes.
From playlist ASTRONOMY 6 TELESCOPES
Studying Other Worlds with the Help of a Starshade
This animation shows the prototype starshade, a giant structure designed to block the glare of stars so that future space telescopes can take pictures of planets. More info here: http://planetquest.jpl.nasa.gov/video/15
From playlist Astrophysics
Radar data of comet P/2016 BA14 taken over three days (March 21—23, 2016), when the comet was between 2.5 million miles and 2.2 million miles (4.1 million kilometers and 3.6 million kilometers) from Earth. Radar images and data from the flyby indicated that the comet is about 3,000 feet
From playlist Asteroid and Comet Watch
October 22, 2012 - Leonard Susskind derives the spacetime metric for a gravitational field, and introduces the relativistic mathematics that describe a black hole. This series is the fourth installment of a six-quarter series that explore the foundations of modern physics. In this quarter
From playlist Lecture Collection | General Relativity
Unseen Footage Of Incredible Military Spy Tech | Reconnaissance And Intelligence Aircrafts | Spark
Today's aerial spies have science fiction capabilities. Reconnaissance and Intelligence Aircraft uses unreleased film to take you on deployment with the pick of today's aircraft and equipment. Featured are battlefield reconnaissance jet fighters and attack-aircraft and Airborne Early Warni
From playlist Spark Top Docs
Children In Space, Dark Forest, Mars Lava Tubes | Q&A 208
What if two black holes with opposing spin merge? Can we use the Moon's L2 Lagrange point? How habitable are Mars's lava tubes? Can Starships compensate for satellite light pollution? All this and more in this week's episode Q&A with Fraser Cain. 🦄 Support us on Patreon: https://patreon.
From playlist Fraser Cain / Universe Today Podcast
Animation depicting NASA's CloudSat satellite in orbit 705 kilometers (438 miles) above Earth.
From playlist CloudSat
GRCon21 - Passive bistatic RADAR using spaceborne Sentinel1 non-cooperative source...
Passive bistatic RADAR using spaceborne Sentinel1 non-cooperative source, a B210 and a Raspberry Pi4 presented by Jean-Michel Friedt and Weike Feng at GNU Radio Conference 2021 We have previously demonstrated passive bi-static RADAR using a static emitter and static (passive bistatic RADA
From playlist GRCon 2021
The secret Soviet radar hidden in Chernobyl’s shadow - BBC REEL
In a remote forest, a few kilometres from the Chernobyl power plant, the huge Duga-2 radar tower stands as relic of Soviet mismanagement. SUBSCRIBE NOW for more videos from BBC Reel. Video by Adrian Hartrick and Dominika Ozynska #bbcreel #bbc #bbcnews
From playlist Secret Worlds
Time To Remember - Struggle For A Planet 1943 - Reel 4 (1943)
Pathe have rights to clips in Time to Remember programmes but not to commentary or whole programme as screened. Reel 4. 01:19:52 VS of Casablanca Conference. Winston Churchill and American President Franklin D Roosevelt sit together and talk to the press. 01:20:17 Shots of th
From playlist Amazing Narrators
Frédéric Barbaresco - Le radar digital...
Frédéric Barbaresco - Le radar digital ou les structures géométriques élémentaires de l’information électromagnétique Conférence donnée devant L'Association des Amis de l'IHES à l'IHES le 9 mars 2017. Frédéric Barbaresco, représentant KTD Board Processing, Computing & Cognition auprès d
From playlist Évenements grand public
The New Horizons Jupiter Flyby Animated
New Horizons was designed to explore the furthest reaches of the solar system, but the first target was Jupiter. This is how New Horizons saw Jupiter, unaltered and all in one animation. Music: Their Story, Them Seeing - Puddle of Infinity https://youtu.be/O1QMVcx1n9c Image, video, song
From playlist New Horizons Exploration
This video introduces the concept of phased arrays. An array refers to multiple sensors, arranged in some configuration, that act together to produce a desired sensor pattern. With a phased array, we can electronically steer that pattern without having to physically move the array simply b
From playlist Understanding Phased Array Systems and Beamforming
Christian Claudel: "Data assimilation & optimal control in the context of UAV-based flash flood..."
Mathematical Challenges and Opportunities for Autonomous Vehicles 2020 Workshop III: Large Scale Autonomy: Connectivity and Mobility Networks "Data assimilation and optimal control in the context of UAV-based flash flood monitoring" Christian Claudel - University of Texas at Austin Abstr
From playlist Mathematical Challenges and Opportunities for Autonomous Vehicles 2020
What's on CRO's risk radar today and in 2021?
"Just because we see on TV that there is social unrest somewhere in the suburbs of Paris, that doesn't have a immediate direct impact on my portfolio. But medium and long-term, it can, and also maybe will have consequences." Christian Bluhm, Group Chief Risk Officer and Member of the Grou
From playlist CRO forum
Stars of Cepheus as Seen by NASA's Spitzer Space Telescope
Soar through this cosmic landscape filled with bright nebulas, as well as runaway, massive and young stars. The image comes from NASA's Spitzer Space Telescope, which sees the universe in infrared light. For more about Spitzer, visit https://www.nasa.gov/spitzer or http://www.spitzer.calte
From playlist Spitzer Space Telescope