Transcript: Continuous Wave Radar - What is a radar ? - How does radar work ? - What is the basic principles ? Our radar system Pulse Radar RADAR
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Transcript: Types find and identify objects in water, determine water depth http://www.timetoast.com/timelines/history-of-sonar Daniel Colloden used an underwater bell to calculate the speed of sound at Lake Geneva, Switzerland. This led to other inventors experimenting with sonar. Lewis Nixon created the first sonar listening device to detect icebergs. Robert Boyle is recruited to create a sonar device, and beats all other countries in doing so. What it is A system for the detection of objects under water and for measuring the water's depth by emitting sound pulses and detecting or measuring their return after being reflected. Active sonar transducers* emit an acoustic signal or pulse of sound into the water. If an object is in the path of the sound pulse, the sound bounces off the object and returns an “echo” to the sonar transducer. Passive sonar systems are used primarily to detect noise from marine objects (such as submarines or ships) and marine animals like whales. SONAR SOund NAvigation and Ranging Facts Prior to the advent of sonar, mariners used lead lines to take systematic 'soundings' of the seafloor, which enabled them to produce early depth charts and bathymetric maps. Sonar was first used during World War I to detect submarines. By the 1920s, the U.S. Coast and Geodetic Survey—the precursor to NOAA’s National Ocean Service—was using it to map deep-water areas. Structure Advantages Who Made It Timeline
Transcript: RADAR . Radio Aim Detection and Ranging . developed during WW2 . sending out electromagnetic waves which get reflected by an object, return to transmitter and then get evaluated History . German scientist Heinrich Hertz 1886 . Sir Robert Watson- Watt 1935 . huge breakthrough 1943 Physics . reflected electromagnetic waves - get evaluated by the transmitter . Doppler effect . wavelength shorter- bounce off like in a mirror . wavelength longer- poor reflection . stealth aircraft Doppler Effect What is Radar? HIPP & WARMUTH . Christian Doppler . the change in frequency of a wave - relative to the transmitter . equation of the Doppler effect - speed and distance
Transcript: What is Radar? Radar stands for: RAdio Detection And Ranging RADAR Questions How It Works What It's Used For
Transcript: ''Meteorologists use many different tools for different purposes. Most people are familiar with thermometers, barometers, and anemometers for measuring temperature, air pressure, and wind speed, respectively. Meteorologists use other tools, as well. For example, weather balloons are special balloons that have a weather pack on them that measures temperature, air pressure, wind speed, and wind direction in all the layers of the troposphere. '' http://www.gpb.org/blogs/talking-up-a-storm/2012/02/15/students-ask-how-do-meteorologists-predict-the-weather Cources ''The radio waves used by radar are produced by a piece of equipment called a magnetron. Radio waves are similar to light waves: they travel at the same speed—but their waves have much longer wavelengths and higher frequencies. The antenna doubles up as a radar receiver as well as a transmitter. Typically it transmits radio waves for a few thousandths of a second.'' By: Ben kennedy, Max Downs, Kevin Pearson, and Gabe Hindle 1. http://www.gpb.org/blogs/talking-up-a-storm/2012/02/15/students-ask-how-do-meteorologists-predict-the-weather 2. http://www.bing.com/images/search?q=anemometer&FORM=HDRSC2&adlt=strict#view=detail&id=845EECA1DFB4E68CC1C392A635B6E5839731DB48&selectedIndex=9 3. http://science.howstuffworks.com/radar.htm Radar is something that is in use all around us, although it is normally invisible. Air traffic control uses radar to track planes both on the ground and in the air, and also to guide planes in for smooth landings. Police use radar to detect the speed of passing motorists. NASA uses radar to map the Earth and other planets, to track satellites and space debris and to help with things like docking and maneuvering. The military uses it to detect the enemy and to guide weapons. How does radar work What is Radar? RADAR How meteorologists use radar to predict weather
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Transcript: Nobody knows babies like we do! Quality products . Good Customer service. Every Kid really loves this store.. BABYLOU ABOUT US About Us BabyLou was established in 2004. It has been more than a decade since we started, where we have ensured to take care of every need and want of every child and infant under one roof, true to the caption “NO BODY KNOWS BABIES LIKE WE DO”. Our benchmark is to provide 100% customer service and satisfaction and continue to deliver the same with a wide range of toys, garments and Baby Products. Play and Create We Are Best 01 02 03 Block games Building Blocks help Kids to use their brain. PLAY TO LEARN in Crusing Adventures Our Discoveries Enjoy a sunny vacation aboard a luxury yacht with the LEGO® Creator 3in1 31083 Cruising Adventures set. This ship has all the comforts you need, including a well-equipped cabin and a toilet. Sail away to a sunny bay and take the cool water scooter to the beach. Build a sandcastle, enjoy a picnic, go surfing or check out the cute sea creatures before you head back to the yacht for a spot of fishing. Escape into the mountains Disney Little Princes in Also available for your Babies..... Also... Out of The World… Our reponsibility BABYLOU…. Our Responsibility All children have the right to fun, creative and engaging play experiences. Play is essential because when children play, they learn. As a provider of play experiences, we must ensure that our behaviour and actions are responsible towards all children and towards our stakeholders, society and the environment. We are committed to continue earning the trust our stakeholders place in us, and we are always inspired by children to be the best we can be. Innovate for children We aim to inspire children through our unique playful learning experiences and to play an active role in making a global difference on product safety while being dedicated promoters of responsibility towards children.
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