Definitions for very small aperture terminal

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Dictionary of Military and Associated Terms

  1. very small aperture terminal

    Refers to a fixed satellite terminal whose antenna diameter typically does not exceed two meters. Also called VSAT.


  1. Very-small-aperture terminal

    A very small aperture terminal is a two-way satellite ground station or a stabilized maritime VSAT antenna with a dish antenna that is smaller than 3 meters. The majority of VSAT antennas range from 75 cm to 1.2 m. Data rates range from 4 kbit/s up to 4 Mbit/s; some upgraded modules can even reach a max downlink of up to 16 Mbit/s. VSATs access satellites in geosynchronous orbit to relay data from small remote earth stations to other terminals or master earth station "hubs". VSATs are used to transmit narrowband data, or broadband data. VSATs are also used for transportable, on-the-move or mobile maritime communications.


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