artificial satellite

(noun)

In the context of spaceflight, a satellite is an object which has been placed into orbit by human endeavour.

Related Terms

  • natural satellite

Examples of artificial satellite in the following topics:

  • Satellites

    • Natural satellites are celestial objects that orbit a larger body; artificial satellites are manmade objects put in the orbit of the Earth.
    • Artificial satellites (see ) are man made objects put in orbit about the Earth or another planet in the Solar System.
    • Natural satellites are often classified in terms of their size and composition, while artificial satellites are categorized in terms of their orbital parameters.
    • Of the inner planets, Mercury and Venus have no natural satellites; Earth has one large natural satellite, known as the Moon; and Mars has two tiny natural satellites, Phobos and Deimos.
    • By far this is the most common type of orbit with about 2,500 artificial satellites orbiting the Earth.
  • Dynamics of UCM

    • The gravitational force is responsible for artificial satellites orbiting the Earth.
  • Radio Waves

    • Artificially generated radio waves are used for fixed and mobile radio communication, broadcasting, radar and other navigation systems, communications satellites, computer networks and innumerable other applications.
    • Satellite dishes and cable transmission of TV occurs at significantly higher frequencies, and is rapidly evolving with the use of the high-definition or HD format.
  • Kepler's Third Law

    • Using subscripts 1 and 2 to denote two different satellites, and taking the ratio of the last equation for satellite 1 to satellite 2 yields
    • We obtain a relationship that can be used to determine the mass M of a parent body from the orbits of its satellites:
    • If r and P are known for a satellite, then the mass M of the parent can be calculated.
    • This principle has been used extensively to find the masses of heavenly bodies that have satellites.
    • Furthermore, the ratio r3/T2 should be a constant for all satellites of the same parent body (because r3/T2=GM/4π2).
  • Microwaves

    • This frequency range is used for most radar transmitters, microwave ovens, wireless LANs, cell phones, satellite communication, microwave radio relay links, and numerous short range terrestrial data links.
    • They are used for television broadcasting, cordless phones, walkie-talkies, satellite communication, and numerous other applications.
    • Most satellite-transmitted information is carried on microwaves, as are land-based long-distance transmissions.
  • Wireless Communication

    • Other examples of applications of radio wireless technology include GPS units, garage door openers, wireless computer mice, keyboards and headsets, headphones, radio receivers, satellite television, broadcast television, and cordless telephones.
    • Mobile Satellite Communications may be used where other wireless connections are unavailable, such as in largely rural areas or remote locations.
    • Satellite communications are especially important for transportation, aviation, maritime, and military use.
  • Antennae

    • These include: radio broadcasting, broadcast television, two-way radio, communications receivers, radar, cell phones, and satellite communications; as well as other devices such as garage door openers, wireless microphones, bluetooth enabled devices, wireless computer networks, baby monitors, and RFID tags on merchandise.
  • Centripetal Force

    • It can be seen in the orbit of satellites around the earth, the tension in a rope in a game of tether ball, a roller coaster loop de loop, or in a bucket swung around the body.
  • Overview of Non-Uniform Circular Motion

    • 2: The radial (centripetal) force is constant (like a satellite rotating about the earth under the influence of a constant force of gravity).
  • Nuclear Stability

    • Radionuclides occur naturally but can also be produced artificially.
    • For every chemical element, many radioisotopes that do not occur in nature (due to short half-lives or the lack of a natural production source) have been produced artificially.
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