A METHOD OF SENDING ENERGY WAVES FROM A SATELLITE TO AN AREA OF EARTH BEING OBSERVED IS?
The method of sending energy waves from a satellite to an area of Earth being observed is known as satellite communication. Satellite communication involves the transmission and reception of microwave signals between a satellite in space and ground stations or user terminals on Earth.
To understand how this process works, let's break it down into steps:
1. Uplink Transmission: The process begins with a ground station or user terminal on Earth transmitting data or information to a satellite. This transmission is done using a parabolic dish antenna, which focuses the signal into a narrow beam aimed at the satellite.
2. Satellite Reception: The satellite receives the uplink transmission from the ground station. It is equipped with an antenna that captures the signal and redirects it to its communication system.
3. Signal Processing: Once the satellite receives the uplink transmission, it performs various tasks, such as amplifying the weak signals, filtering out noise, and converting the signal to a different frequency band for downlink transmission.
4. Downlink Transmission: After processing the uplink transmission, the satellite sends the converted signal back to Earth. It does this by emitting energy waves in the form of microwave signals. These signals travel through space and are directed towards a specific area on Earth, known as the footprint.
5. Ground Reception: Ground stations or user terminals located within the footprint of the satellite receive the downlink transmission. These stations use parabolic dish antennas to capture the microwave signals and convert them into usable data or information.
It's important to note that satellite communication involves careful coordination of transmission frequencies, signal strength, and orbital positioning to ensure efficient and reliable communication between the satellite and the Earth.
Overall, satellite communication enables us to transmit various forms of information, including television signals, internet data, telephone calls, and weather data, over long distances and across geographical barriers.