Introduction : Television has become a wide ranging and powerful medium of mass communication in this ever shrinking world.

It had now become possible to have an international programs with global coverage by linking national TV systems through satellites.

Communication satellites in geo stationary orbits have opened new vistas for global television broadcasting. Direct to Home (DTH) broadcasting satellites for television have been launched by several countries including India.

These satellites emit high power radiations enough to be received directly through low cost medium to small size dish antennas on conventional TV receivers augmented by a front end converter.

The INSAT 2 & 4 series satellites launched by India are widely being used for TV programme and for other communications.

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