Geostationary Orbit

Geostationary Orbit refers to a circular orbit present above the earth’s equatorial plane possessing a period of revolution equivalent to the period of rotation of the earth. Here the term ‘geostationary’ corresponds to the orbit where the satellite appears to remain fixed at a point or stationary with respect to the surface of the earth. …

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Global Positioning System (GPS)

Global Positioning System commonly in trend as GPS is a type of satellite navigation system designed to provide the position and timing information of the user. Here the name itself is indicating that GPS includes a set of elements that forms a system that helps in globally locating the presence of users at a specific …

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Satellite Navigation

Satellite Navigation commonly known as satnav is regarded as one of the best features of satellite communication. Satellite Navigation is defined as the science that provides the actual information regarding the location and timing services of the user by the use of satellites. Basically in satellite navigation, a number of satellites are used to identify …

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Asynchronous Transfer Mode (ATM)

Asynchronous Transfer Mode abbreviated as ATM is a technique that allows transmission of information (such as voice, video, and data) in small packets (called cells) of fixed sizes. Each cell size of 53 octets is divided between Header or Overhead (5 octets) and Payload (48 octets). This standard protocol proposed by The International Telecommunication Union …

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Satellite Downlink

Satellite Downlink or downlink of satellite circuit is a feeder link that transmits the signal from satellite down towards the ground-based station i.e., earth station. The downlink includes the factors that affect the transmission from satellite to earth station. It can be understood more easily by considering that downlink denotes a link down from the …

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Satellite Uplink

Satellite Uplink or uplink of satellite circuit is the link where the earth station is transmitting the radio wave towards the satellite which acts as the receiving station. It includes all those factors responsible for transmitting signals from an earth station to a satellite. Satellite links allow us to enable communication over large distances. The …

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Satellite Link Budget

Satellite link budget or simply link budget in satellite communication is nothing but the calculation of various factors so as to have an estimation of power that is transmitted from the earth station to satellite and satellite to earth station in order to have a reasonable amount of power reception at the ends. This calculation …

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Kepler’s Three Laws

The motion of satellites in space was governed by the laws of planetary motion proposed by Johannes Kepler. There are three laws, known as Kepler’s three laws that describe the motion of a satellite in space. The first law of Kepler is also known as the law of orbits, the second law is called the …

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