`specfem::source_time_functions::Ricker`¶

class Ricker : public specfem::source_time_functions::stf ¶

Ricker wavelet source time function (first derivative of a Gaussian)

Commonly used in seismic modeling, defined as the second derivative of a Gaussian function.

Public Functions

Ricker(const int nsteps, const type_real dt, const type_real f0, const type_real tshift, const type_real factor, const bool use_trick_for_better_pressure, const type_real t0_factor = 1.2)¶

Construct a Ricker source time function.

Parameters:

nsteps – Number of time steps
dt – Time step size
f0 – Central frequency
tshift – Time shift value
factor – Scaling factor
use_trick_for_better_pressure – Use pressure optimization trick
t0_factor – Start time factor (default: 1.2)

Ricker(YAML::Node &Ricker, const int nsteps, const type_real dt, const bool use_trick_for_better_pressure, const type_real t0_factor = 1.2)¶

Construct a Ricker source time function from YAML configuration.

Parameters:

Ricker – YAML node with Ricker parameters
nsteps – Number of time steps
dt – Time step size
use_trick_for_better_pressure – Use pressure optimization trick
t0_factor – Start time factor (default: 1.2)

type_real compute(type_real t)¶

Compute source time function value at time t.

Parameters:: t – Time value
Returns:: Source time function value

inline virtual void update_tshift(type_real tshift) override¶

Update the time shift value.

Parameters:: tshift – New time shift value

inline virtual type_real get_t0() const override¶

Get start time value.

Returns:: Start time t0

inline virtual type_real get_tshift() const override¶

Get the time shift value.

Returns:: Time shift value

virtual std::string print() const override¶

Get string representation of the source time function.

Returns:: String describing the STF parameters

virtual void compute_source_time_function(const type_real t0, const type_real dt, const int nsteps, specfem::kokkos::HostView2d<type_real> source_time_function) override¶

Compute source time function values for all time steps.

Parameters:

t0 – Start time
dt – Time step size
nsteps – Number of time steps
source_time_function – Output view to store computed values

virtual bool operator==(const stf &other) const override¶

Equality operator.

Parameters:: other – Another source time function to compare with
Returns:: true if equal, false otherwise

virtual bool operator!=(const stf &other) const override¶

Inequality operator.

Parameters:: other – Another source time function to compare with
Returns:: true if not equal, false otherwise

specfem::source_time_functions::Ricker¶

`specfem::source_time_functions::Ricker`¶