satnav system is a system that uses satellites to provide autonomous geopositioning
The process of moving information from one location to another by means of a communication satellite in Earth's orbit is known as satellite communication. To get a better understanding of it, compare it to how simple it is t watch the English Premier League on television. This is now feasible because of satellite communication. For a better understanding, let's examine the meaning of this and investigate its uses, benefits, and varieties.
Introduction to Satellite Communication
An artificial satellite known as a communication satellite is in charge of sending a signal through a transponder, which opens a channel between a transmitter and a receiver that are located apart on Earth.
Satellite communications are used in telephone, radio, television, internet, and military applications. As you read this post, more than 2000 man-made satellites are circling around in space over your heads. I know that sounds unbelievable.
Working Of Satellite Communications Work
The communication satellites are similar to the space mirrors that help us transfer signals from one side of the earth to the other, such as television, internet data, and radio. It has three phases, which can clarify how it operates. They are as follows:
Let's examine an illustration of a television transmission. The signal from the television broadcast on the opposite side of the planet is first beam up to the satellite from the earthly ground station in the first stage. This procedure is known as uplink.
Transponders, such as radio receivers, amplifiers, and transmitters, make up the second stage. These transponders are used to alter the frequency of the incoming signal and to amplify it. This aids in preventing modification of the outgoing signals. Depending on the incoming signal sources, different transponders are used.
The data is finally sent to the other end of the earthly receiver via a downlink in the third stage.It is crucial to realize that there are typically many downlinks and one uplink.
Need for Satellite Communication
As you are already aware, there are many different ways to communicate, and there are several ways in which these waves might spread. Ground wave and skywave propagation are the two methods that communication was possible over a specific distance. They can only travel a maximum of 1500 km, however this was overcome when satellite communication was implemented.
Applications of Satellite Communication
There are quite a lot of applications for which we use it. It includes the following:
Telephone
Digital cinema
Television
Internet access
Radio broadcasting
Disaster Management
Amateur radio
Military
Advantages of Satellite Communication
We shall examine each of the many benefits in-depth. First of all, it simplifies circuit installation. Second, these circuits have amazing suppleness. Thirdly, we are able to explore every inch of our world with its assistance. Ultimately, the user holds total control over the network.
Disadvantages of Satellite Communication
Although there are benefits, there are drawbacks as well, such as a high upfront cost. There's also a good likelihood the frequencies will be restricted after that. Additionally, there is interference and propagation.
Passive and Active Satellites
Two different types of man-made satellites are used in satellite communication to carry out signal transmission. Both active and passive satellites exist.
Passive Satellites
A hydrogen balloon with a metallic covering becomes a passive satellite in theory if it is launched into the atmosphere. This type of balloon has the ability to reflect microwave signals in all directions. Passive satellites in space function similarly as well. These satellites do little more than amplified signal reflection back towards Earth.
Active Satellites
In contrast to passive satellites, active satellites boost the sent signals before sending them back to Earth. Outstanding signal strength is guaranteed. The first satellites for communication were passive ones, but nearly all of the ones that are being launched presently are active ones.
Satellite Communication Services
We can classify the satellite communication services into two categories which are:One-way satellite communication facilitate communication between one or more earth stations. Furthermore, communication takes place between the first earth satellite's transmitter and the second earth satellite's receiver. Moreover, the signal is only transmitted in one way.
The following are a few examples of one-way satellite communication:
Position location services are offered by the radio
A part of space operations services is tracking
Internet services come about with broadcasting satellites
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