Thursday, May 30, 2019

Radar: A Silent Eye In The Sky :: essays research papers fc

Radar A Silent Eye in the alternateTodays society relies heavily on an invention taken for granted communicate detection and ranging.Just about everybody uses radar, whether they realize it or not. Tens ofthousands of lives rely on the precision and speed of radar to guide their planethrough the skies unscathed. Others just use it when they turn on the morningnews to check the weather forecast.While radar seems to be an heavy part of our everyday lives, it hasnot been around for long. It was not put into effect until 1935, near World WarII. The British and the Americans both worked on radar, but they did not worktogether to build a single system. They each developed their own systems at thesame time. In 1935, the first radar systems are installed in Great Britain,called the Early Warning Detection system. In 1940, Great Britain and theUnited States install radar aboard fighter planes, giving them an advantage inplane-to-plane struggle as well as air-to-ground attacks.Radar w ork on a relatively simple theory. Its one that everybody hasexperienced in their lifetime. Radar works much like an echo. In an echo, asound is sent out in all directions. When the sound waves find an object, suchas a drop curtain face, they will bounce back to the source of the echo. If you countthe number of seconds from when the sound was made to when the sound was heard,you can figure out the distance the sound had to travel. The form is(S/2) X 1100 = D (Half of the total time times 1100 feetper second equals the distance from the origin to the reflection point)Of course, radar is a much more complicated system than just somebodyshouting and listening for the echo. In fact, modern radar listens not only foran echo, but where the echo comes from, what direction the object is moving, itsspeed, and its distance. There are two types of modern radar continuous waveradar, and pulse radar.Pulse radar works like an echo. The transmitter sends out short burstsof radio waves. It whenc e shuts off, and the receiver listens for the echoes.Echoes from pulse radar can tell the distance and direction of the objectcreating the echo. This is the most common form of radar, and it is the onethat is used the most in airports around the world today.Continuous wave radar works on a different theory, the Doppler Theory.The Doppler Theory works on the principle that when a radio wave of a set

No comments:

Post a Comment

Note: Only a member of this blog may post a comment.