Radar

Radar is a kind of technology which can detect the position, distance, height and direction, speed of a target at rest or in motion through electromagnetic wave. It is the short form of receiving signal and detecting range. Therefore, the elaborate form of RADAR is Radio Detection and Ranging. The word radar refers both the technology and the equipment at the same time. If it is assumed as responsive equipment then its objective is to give an idea of some characteristics of the user’s surroundings. As it is mention earlier. Otherwise it gives information of earth surface or a balanced idea of weather. Besides it gives us information regarding surface plane and characteristics of astronomical targets nearby or at a distant. Most often radar is used as a part of any broad technology or subsidiary equipments are used along with radar. Radar technology is frequently and effectively used in airplane, ship, car, analyzing weather, astronomical purposes and land.                                           


            


   

Previously it was mention that radar works through electromagnetic wave. Radio waves are transmitted from an internal transmitting device of radar which is received by a receiver of radar after reflecting on a target. The receiver and the transmitter are often installed in same place. Though the reflected radio waves are weak, those can be amplified as required. That is why radar can detect targets at a distant by radiation. But other sound waves or visible light waves are quite hard to detect. The distance from a reflecting target is measured by analyzing the time taken in between the radiation of radar pulse and the reflection. In most cases this time taken is of very short duration. In Britain the real name of radar was RDF (Radio Direction Finder). In the year of 1941 it was started of using the name RADAR.                                           RADAR with ARPA used for navigation as an aid of analyzing the data received.