Physics, asked by Abhinav429, 1 year ago

How cassini,voyger or any other spacecraft sends good image to Earth if there is no internet

Answers

Answered by Anonymous

Very high frequency bands, such as X-band (8-12 GHz), are typically used for far away spacecraft. Currently, relays are not used from spacecraft that are in space to talk to Earth. They aim their antenna at Earth and the signal is picked up directly by the massive dishes that make up the DSN (Deep Space Network). These dishes are located in places like Canberra, Australia and New Mexico.

Relays are sometimes used for rovers that have landed on a planet. Curiosity, for example, can communicate directly to Earth (when it is visible). When it isn't, Curiosity relays its signal to one of the Mars Orbiters, which then pass it on to Earth.

Abhinav429: then if this is the case why error not often occurs cause distance is massive so frequency should be weak by the time it reaches

Abhinav429: don't lie just copied and pasted iy

QuantumBoy: frequency is not going to weak.

QuantumBoy: you need to read more books. okay

Abhinav429: i have to, your Highness but why

Abhinav429: it will not weak

QuantumBoy: I completed you 6month course from Stanford University in The special theory of relativity.

Abhinav429: i said your highness what else you want

Abhinav429: explain me why

Answered by QuantumBoy

Radio waves have longer wavelengths and are reflected by the ionosphere (part of the Earth's atmosphere).

Satellite communications also based on radio wave communication.
Cassini spacecraft or other satellite also operates by radio wave.

The electromagnetic spectrum the amplitude modulation of radio wave is quite well so, satellite communications via two system.

Transmitter and Receiver if Satellite is transmitter antenna.

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