Translations:Dictionary:Complex-trace analysis/3/en

where $f_{\perp }(t)$ is the quadrature series, $A(t)$ is the amplitude of the envelope of the trace (also called reflection strength), and $\phi (t)$ is the instantaneous phase. Displays of instantaneous phase (or cosine of the instantaneous phase) show the continuity of an event. Instantaneous frequency is $d\phi (t)/dt$. Instantaneous frequency can be thought of as the frequency of the complex sinusoid that locally best fits a complex trace. Used to determine seismic attributes. In the space domain, "local" is sometimes used instead of "instantaneous". See Figure C-11 y Taner et al. (1979). Complex-trace analysis often involves the Hilbert transform.