# time step parameters
#       ----------       DEVITO X-WELL EXAMPLE    ----------
# total number of time steps
NSTEP                           = 10000

# duration of a time step (see section "How to choose the time step" of the manual for how to do this)
DT                              = 0.1E-3

#-----------------------------------------------------------
#
# Receivers
#
#-----------------------------------------------------------

# receiver set parameters for recording stations (i.e. recording points)
# seismotype : record 1=displ 2=veloc 3=accel 4=pressure 5=curl of displ 6=the fluid potential
seismotype                      = 1              # several values can be chosen. For example : 1,2,4


# interval in time steps for writing of seismograms
# every how many time steps we save the seismograms
# (costly, do not use a very small value; if you use a very large value that is larger than the total number
#  of time steps of the run, the seismograms will automatically be saved once at the end of the run anyway)
NTSTEP_BETWEEN_OUTPUT_SEISMOS   = 1000

# set to n to reduce the sampling rate of output seismograms by a factor of n
# defaults to 1, which means no down-sampling
NTSTEP_BETWEEN_OUTPUT_SAMPLE    = 40

#-----------------------------------------------------------
#
# adjoint kernel outputs
#
#-----------------------------------------------------------

# save sensitivity kernels in ASCII format (much bigger files, but compatible with current GMT scripts) or in binary format
save_ASCII_kernels              = .true.

# since the accuracy of kernel integration may not need to respect the CFL, this option permits to save computing time, and memory with UNDO_ATTENUATION_AND_OR_PML mode
NTSTEP_BETWEEN_COMPUTE_KERNELS  = 1

# outputs approximate Hessian for preconditioning
APPROXIMATE_HESS_KL             = .false.