Agc - Automatic gain control with first arrival detection
Agc window=200 detect=0 dwind=10 thresh=25. < in.H > out.H
[200]: length of the window in number of samples
[10]: length of the detection window in number of samples
[0]: detection off (Default value) 1: detection on
[25.]: threshold (see comments below)
standard seplib parameters
Gain program with first arrival detection
Agc gains seismic traces by normalizing each sample by the power of a window of samples surrounding that point.
When the detect= is set to 1, agc is not applied on a trace until a first arrival is detected. The first arrival is detected when a moving dwind exceeds an initial dwind by a threshold factor.
Agc < in.H window=200 detect=1 dwind=10 thresh=25. > out.H
Applies agc on a trace based on a trace window of 200 samples. Agc is only applied after the first arrival has been detected using a detection window of 10 samples. The detection of the first arrival is based on an amplitude change between consecutive detection windows of 25%.
seis/filter