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Time-Gain
Time-Gain applies a time-varying gain to compensate for amplitude loss due to spreading and
attenuation. The trace is multiplied by a gain function combining linear and an exponential gain,
with coefficients set by the user.
Trace
A "trace" is a single, vertical column of GPR data, representing the signal "traced" by a radar
pulse as it travels from the instrument into the subsurface. Each trace is com- posed of
individual "samples," the smallest measurement unit in the vertical dimension. Because of
geometrical "spreading," the radar signal decreases in strength with depth as 1/r2, where r is
depth.
