What is a satellite terminal in the context of airport design?

A satellite terminal refers to a facility that houses aircraft gates and is physically separated from the main terminal building of an airport. The primary distinction is that satellite terminals typically require supplemental conveyances, such as trams, buses, or tunnels, to transport passengers to and from the main terminal. This design approach allows airports to expand capacity and manage passenger flow more efficiently, particularly in larger airports where land space may be limited.

The correct answer accurately captures this concept, highlighting the functional relationship between the satellite terminal and the main terminal. In contrast, the other options do not convey this separation or the need for additional transportation methods, which are key characteristics of satellite terminals.