RADAR is an electromagnetic system which is used for sensing, detecting and locating the objects present in the ambience. RADAR stands for Radio Detection and Ranging. It can observe the environment conditions that are impervious to the human vision. RADAR has become a high-end security system on which surveillance of entire world depends and becoming more and more popular nowadays. Radars have been deployed on ground, on sea, in air, and in space for detecting and locating objects. Radar is most effective when used with complementary sensors such as Closed Circuit Television (CCTV), Perimeter Intruder Detection Systems (PIDS) and thermal imagers.
Radar has the capability to undertake area surveillance. As well as alerting the security operator to the presence of multiple potential threats, radar can determine the precise location of those threats and advanced systems can track their positions over time.