What is a Satellite? Types of Satellites is the subject of this essay. In our day-to-day lives, satellites are quite vital. They were first employed as a covert gadget for espionage and other military operations. They moved into digital communication domains that impacted our everyday lives as commercialization increased.
Satellite offers a variety of services, including global television broadcasting, remote phone calls, community radio, weather forecasts, news reporting, Ola/Uber taxi-hailing, geo-mapping, vehicle tracking, and more. Many business models have been developed to make use of satellite services’ potential. Let’s look at the characteristics of satellites and their many varieties in this article.
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What is a Satellite?
Sun, planets, and moons make up the Solar System (Natural satellites). In the Milky Way Galaxy, the Sun is one among billions of stars. The Milky Way is one of the universe’s billions of galaxies. Satellite refers to any object in space that revolves around another larger object. The course of this orbit might be either circular or elliptical. All of the little items spinning around it are held in place by the larger object, which supplies them with life, light, heat, and energy.
1. Satellite of Natural Origin
Natural Satellites are planets that circle the Sun, such as Earth, Jupiter, Uranus, Saturn, Neptune, and Mars. The Sun is in charge of the whole solar system; it occupies the crucial position and supplies all of the planets’ resources. This natural satellite category also includes moons like as Titan, Ganymede, Callisto, Rhea, Miranda, and the Moons circling Planets. There are around 240 moons circling Planets, Dwarf Planets, and other solar system entities in the solar system.
2. Satellites that are not natural
These satellites are manufactured and launched in space with particular objectives, circling Earth or other planets. Between 1998 and 2011, five participating space agencies, including NASA (USA), JAXA (Japan), ESA (Europe), Roscosmos (Russia), and CSA (Canada), developed an international space station, which was visited by 230 astronauts from 18 nations. This space station serves as a laboratory for performing space research and testing potential lunar and Mars expeditions.
Natural satellites are referred to as moons, whereas artificial satellites are referred to as satellites. We will focus on Artificial Satellite for the remainder of this article.
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Types of Satellites
weather satellites Meteorologists may use weather satellites to forecast the weather or to observe what’s going on right now. One such satellite is the Geostationary Operational Environmental Satellite (GOES). These satellites often include cameras that can take photographs of Earth’s weather from geostationary or polar orbits.
communications satellite Telephone and data conversations may be carried over the satellite using communications satellites. Telstar and Intelsat are two popular telecommunication satellites. The transponder, a radio that receives a conversation at one frequency, amplifies it, and retransmits it to Earth on a different frequency, is the most significant part of a communications satellite. Hundreds of thousands of transponders make up a satellite.
Geosynchronous satellites are the most common kind of communication satellite (more on that later).
Satellites that transmit television signals from one location to another are referred to as broadcast satellites (similar to communications satellites).
Scientific satellites, such as the Hubble Space Telescope, are used for a variety of purposes. From sunspots to gamma rays, they examine everything.
Ships and aircraft benefit from navigational satellites. GPS NAVSTAR satellites are the most well-known.
Radio distress signals trigger rescue satellites (read this page for details). Changes in everything from temperature to forestation to ice sheet coverage are monitored by Earth observation satellites. Landsat is the most well-known.
Military satellites orbit the earth, but most of the knowledge about their use is kept under wraps. Relaying encrypted communication, nuclear monitoring, tracking enemy movements, early warning of missile launches, eavesdropping on terrestrial radio lines, radar imaging, and photography are just a few examples of possible applications (using what are essentially large telescopes that take pictures of militarily interesting areas).
History of Satellites
Russia launched Sputnik 1 in 1957, making it the first satellite. Following this, 40 nations launched 8900 satellites. Around 5000 of them are still in orbit, 1500 of which are operational, while the rest have reached the end of their useful lives and are now junk in space. Approximately 100 satellites have been launched by India so far.
Depending on the purposes, these satellites are positioned in space at various altitudes and towards various planets. 63 percent of active satellites are in low orbit (2000 km), 6% in medium orbit (20000 km), 20% in geostationary orbit (36000 km), and 2% in elliptic orbit (> 36000 km).
Satellite’s Uses
Here are some examples of applications:
Military Satellites: A satellite is neither military nor commercial by definition, and its classification is determined by the purpose for which it is deployed. Military satellites are used to monitor, scan, and track the enemy’s space objects. They scan the space for the enemy’s items and transmit photographs and other information to the host nation.
Weather forecasting: Satellite image feeds of the Earth aid in the monitoring of climatic conditions on the planet, the prediction of severe weather events such as storms, hurricanes, and cyclones, and the efficient management of catastrophes.
Direct-to-Home (DTH) telecasting and radio: Live TV shows may be received through satellite without the usage of a cable box. Transponders receive a fixed-frequency signal from the broadcaster and transmit it at a distinct frequency to each of our houses. Radio follows the same principle, with programming broadcasting to any part of the globe.
Navigation: Satellites track and record the whereabouts of each item in the world, allowing us to link automobiles, employees, and everything else to their owners.
Wireless telephone contact with anybody in any distant part of the planet is possible thanks to satellite, and it works in all weather.
Conclusion
The industry was able to speed its change because of satellite communication. Satellite technology is used to develop new mobile apps that link all stakeholders to the business. we hope this information regarding satellites is given you the best knowledge about satellites.
