SOLAR SYSTEM

Detailed explanation-1: -A passive satellite is the one that just reflects the signal from one earth station to other earth station(or stations) without any amplification or retransmission.

Detailed explanation-2: -Project Echo was the first passive communications satellite experiment. Each of the two American spacecraft, launched in 1960 and 1964, were metalized balloon satellites acting as passive reflectors of microwave signals.

Detailed explanation-3: -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-4: -Passive satellites only reflect the signal coming from the source, toward the direction of the receiver. With passive satellites, the reflected signal is not amplified at the satellite, and only a very small amount of the transmitted energy actually reaches the receiver.

Detailed explanation-5: -Starshine 3, see Athena I. Echo project. Echo 1 (Echo 1A) Echo 2. Elon Musk’s Tesla Roadster. Hayabusa2. Deployable camera 3 (DCAM3) Small Carry-On Impactor (SCI) Target Marker B. Target Marker A. Tianwen-1. Tianwen-1 Deployable Camera 1. Tianwen-1 Remote Camera. Tianwen-1 Deployable Camera 2.