(September 2014). A general sales agent (GSA) is a sales representative for an airline in a specific country or region. Typically, the GSA is responsible for selling all products of the airline in its region which includes flight tickets and cargo space. A GSA will typically sell the product of more than one airline.
Definition of standing wave. : a single-frequency mode of vibration of a body or physical system in which the amplitude varies from place to place, is constantly zero at fixed points, and has maxima at other points.
Standing Waves. Consider what is happening in the transmission line. The transmitter is feeding power (current and voltage) at a certain frequency or wavelength into the line. At the antenna or load end, some of the power is absorbed by the load or radiated.