why do we need a data communications network in space
1) In digital communication systems, a repeater is a device that receives a
on an electromagnetic or optical transmission medium and regenerates the signal along the next leg of the medium. In electromagnetic media, repeaters overcome the caused by free-space electromagnetic-field divergence or cable loss. A series of repeaters make possible the extension of a signal over a distance. Repeaters remove the unwanted in an incoming signal. Unlike an signal, the original digital signal, even if weak or distorted, can be clearly perceived and restored. With analog transmission, signals are restrengthened with amplifiers which unfortunately also amplify noise as well as information.
Because digital signals depend on the presence or absence of voltage, they tend to dissipate more quickly than analog signals and need more frequent repeating. Whereas analog signal amplifiers are spaced at 18,000 meter intervals, digital signal repeaters are typically placed at 2,000 to 6,000 meter intervals. 2) In a communications system, a repeater consists of a radio receiver, an amplifier, a transmitter, an isolator, and two antennas. The transmitter produces a signal on a frequency that differs from the received signal.
This so-called offset is necessary to prevent the strong transmitted signal from disabling the receiver. The isolator provides additional protection in this respect. A repeater, when strategically located on top of a high building or a mountain, can greatly enhance the performance of a wireless network by allowing communications over distances much greater than would be possible without it. 3) In wireless, a repeater (more frequently called a ) receives uplink signals and retransmits them, often on different frequencies, to destination locations. 4) In a system, a repeater is one of a group of transceivers in a geographic area that collectively serve a system user. 5) In a network, a repeater consists of a photocell, an amplifier, and a light-emitting diode (LED) or infrared-emitting diode (IRED) for each light or IR signal that requires amplification.
Fiber optic repeaters operate at power levels much lower than wireless repeaters, and are also much simpler and cheaper. However, their design requires careful attention to ensure that internal circuit is minimized. 6) Repeaters are commonly used by commercial and operators to extend signals in the radio frequency range from one receiver to another.
These consist of drop repeaters, similar to the cells in cellular radio, and hub repeaters, which receive and retransmit signals from and to a number of directions. 7) A bus repeater links one computer to a bus in another computer, essentially chaining one computer to another. The Audacy network consists of 3 relay satellites in an advanced orbital configuration in Medium Earth Orbit (MEO), paired initially with two ground facilities. The unique locations of our spacecraft allow for serviceable link distances, a comprehensive field of view, and minimal interference with existing spacecraft constellations.
Fast-moving client spacecraft in Low Earth Orbit (LEO) have continuous line of sight to one or more Audacy relays at all times. Client communications are relayed to Audacy ground facilities, and from there are routed to customers using a secure virtual private cloud network. Deep space users will be addressed using Audacy ground assets, with a seamless transition between network nodes. Customers can access their encrypted data from any internet-enabled location. Using this architecture, Audacy can provide continuous communications to thousands of users в in any orbit, at any time.
- Autor: Stephenmiz
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