Wavelets

A collection of seismic data processing wavelet

Berlage

# Seismic.Berlage — Function.

Berlage(; <keyword arguments>)

Create a Berlage wavelet.

Arguments

Keyword arguments

• dt::Real=0.002: sampling interval in secs.
• f0::Real=20.0: central frequency in Hz.
• m::Real=2: exponential parameter of Berlage wavelet.
• alpha::Real=180.0: alpha parameter of Berlage wavelet in rad/secs.
• phi0::Real: phase rotation in radians.

Example

julia> w = Berlage(); plot(w);

Reference

• Aldridge, David F., 1990, The berlage wavelet: GEOPHYSICS, 55, 1508–1511.

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Ormsby

# Seismic.Ormsby — Function.

Ormsby(; <keyword arguments>)

Create a Ormsby wavelet sampled every dt seconds with corner frequencies defined by the vector f = [f1, f2, f3, f4]. The final wavelet is multiplied by a Hamming window.

Arguments

Keyword arguments

• dt::Real=0.002: sampling interval in secs.

• f::Vector{Real}=[2.0, 10.0, 40.0, 60.0]: corner frequencies in Hz.

  ^

  1 | *** | * * | * * | * * | * * ––––––––––––––-> f f1 f2 f3 f4

Example

julia> w = Ormsby(); plot(w);

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Ricker

# Seismic.Ricker — Function.

Ricker(; <keyword arguments>)

Create a Ricker wavelet.

Keyword arguments

• dt::Real=0.002: sampling interval in secs.
• f0::Real=20.0: central frequency in Hz.

Examples

julia> w = Ricker(); plot(w);
julia> w = Ricker(dt=0.004, f0=20); plot(w);

Reference

Sheriff, Robert, 2002, Encyclopedic Dictionary of Applied Geophysics, fourth ed.: Society of Exploration Geophysicists. Geophysical Reference Series No. 13.

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