Which was India's first experimental GEO Communications satellite?

A Geostationary or GEO satellite orbits the planet at the same rate as the planet rotates, so the satellite is always over the same patch of ground.

GEO satellites orbit at a distance of 35,786 Km above the Earth's equator. India's first GEO communication satellite was the APPLE which stands for Airane Passenger Payload Experiment. It was put into orbit during the third test flight of the Ariane launch vehicle.

APPLE weighed 350 kg, and for more than two years, it successfully served as a communications satellite for India. APPLE was used in several fields of communications, including for the relay of TV programmes, and radio networking.

APPLE proved to be an important learning experience for Indian space scientists in the field of building and operating geostationary communication satellites.

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