SOLAR SYSTEM

Detailed explanation-1: -The downlink satellite signal, quite weak after traveling the great distance (see path loss), is collected with a parabolic receiving dish, which reflects the weak signal to the dish’s focal point.

Detailed explanation-2: -Brief Description. Telstar, launched in 1962, was the first active communications satellite: it received microwave signals from ground stations and retransmitted them across vast distances back to Earth. It was the model for all subsequent communications satellites.

Detailed explanation-3: -The first passive satellite transponder was developed and launched by the United States in 1960. The satellite, known as Echo 1, was a large metallic balloon that was able to reflect radio signals back to Earth. The Echo 1 satellite was launched into a low Earth orbit and had a diameter of approximately 100 feet.