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What is a TRP? 1. Anyone watching television for more than a minute is considered a viewer. 2. The TRP or  Target Rating Point is the metric used by the marketing and advertising agencies to evaluate this viewership. Who records TRP in India?   1. The TRP is recorded by the Broadcast Audience Research Council (BARC) using Bar-O-Meters that are installed in televisions in selected households. 2. The BARC has installed these meters in 44,000 households across the country till date. How is the TRP calculated?   1. Audio watermarks are embedded in video content prior to broadcast. 2. These watermarks are not audible to the human ear, but can easily be detected and decoded using dedicated hardware and software. 3.  Viewing details and the watermarks are recorded by the Bar-O-Meters. How are the households selected? 1. A large-scale face-to-face survey of a sample of approximately 3 lakh households from the target population is done annually. 2. Out of these, the households that will have Ba

What is an anti-radiation missile? Anti-radiation missiles are designed to detect, track and neutralise the adversary’s radar, communication assets and other radio frequency sources, which are generally part of their air defence systems. Such a missile’s navigation mechanism comprises an inertial navigation system — a computerised mechanism that uses changes in the object’s own position — coupled with GPS, which is satellite-based.