Introduction and Short History of Satellites and Communication Satellites

Introduction And Brief History Of Satellites

A satellite is any object that orbits a different object (that is referred to as its primary). All masses that are part of the solar system, like the Earth, are satellites either of the Sun or satellites of these objects, like the Moon. It truly is not constantly a simple matter to decide which can be the ‘satellite’ inside a pair of bodies. For the reason that all objects exert gravity, the motion of the major object can also be impacted by the satellite. If two objects are sufficiently comparable in mass, they are typically referred to as a binary system as an alternative to a principal object and satellite. The general criterion for an object to be a satellite is that the center of mass on the two objects is inside the principal object. In common usage, the term ‘satellite’ commonly refers to an artificial satellite (a man-made object that orbits the Earth or yet another body).

Sorts Of Satellites

  • Astronomical satellites: They are satellites utilized for observation of distant planets, galaxies, and also other outer space objects.
  • Communications satellites: They are artificial satellites stationed in space for telecommunications using radio at microwave frequencies. Most communications satellites use geosynchronous orbits or near-geostationary orbits, though some recent systems use low Earth-orbiting satellites.
  • Earth observation satellites are satellites specifically designed to observe Earth from orbit, comparable to reconnaissance satellites but intended for non-military uses for instance environmental monitoring, meteorology, map producing, and so forth. (See particularly Earth Observing System.)

Orbit Kinds

On lots of occasions, satellites are characterized by their orbit. Though a satellite may orbit at pretty much any height, satellites are usually categorized by their altitude:

  • Low Earth Orbit (LEO: 200 – 1200km above the Earth’s surface)
  • Medium Earth Orbit (ICO or MEO:
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