The space segment is known to be another crucial aspect of satellite communication systems other than the control and user segment. The space segment undoubtedly includes satellites however it also comprises the ground-based units that help to maintain the operationality of satellites orbiting the earth. The space segment is designed to receive, store and retransmit …
The term attitude relative to satellite communication corresponds to the orientation of satellite (vehicle) in space. Attitude control is defined as controlling the orientation of the axis of satellites that are orbiting in space. So, the complete set of devices forming a system that helps to analyze and control the orientation of satellites in space …
Interleaving in communication is a process by which the ordering sequence of the encoded bits is changed so that the burst of errors gets distributed across various codewords present in the data rather than being bound to a single codeword. The process of interleaving is a crucial aspect of data communication. In other words, interleaving …
A satellite constellation is a collection of similar types of man-made satellites operating as a single unit in space. The satellites in the constellation are synchronized as a unit to orbit the earth in an optimal manner. Thus, we can say, satellite constellation consists of a group of various satellites deployed at the same altitude …
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. …
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 …
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 …
Demand Assigned Multiple Access is a technique used for the purpose of assigning communication channels to the end-users in response to the requests received from the respective user terminals. It is abbreviated as DAMA and is a crucial technique that supports satellite communication and mainly finds uses in systems that consist of VSATs. The word …
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 …
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 …