ifos3d_toy.inp 8.51 KB
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#-----------------------------------------------------------------
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#                  PARAMETER FILE FOR IFOS3D
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#-----------------------------------------------------------------
#
# Note that z denotes the vertical direction !
#
#-----------------------------------------------------------------------------------
#------------------------ MODELING PARAMETERS --------------------------------------
#-----------------------------------------------------------------------------------
#
#-------------- Domain Decomposition -----------------------------
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number_of_processors_in_x-direction_(NPROCX) = 2
number_of_processors_in_y-direction_(NPROCY) = 2
number_of_processors_in_z-direction_(NPROCZ) = 2
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#
#-------------------- 3-D Grid -----------------------------------
number_of_gridpoints_in_x-direction_(NX) = 160
number_of_gridpoints_in_y-direction_(NY) = 160 
number_of_gridpoints_in_z-direction_(NZ) = 184
distance_between_gridpoints(in_m)_in_x-direction_(DX) = 0.8	
distance_between_gridpoints(in_m)_in_y-direction_(DY) = 0.8
distance_between_gridpoints(in_m)_in_z-direction_(DZ) = 0.8
#
# Caution: first gridpoint is not at {0.0,0.0,0.0} but at {dx,dy,dz}!
#
#------------------- Order of FD Operator -----------------------
order_of_spatial_fd_operators_(FDORDER) = 4
# possible values are 2, 4, 6, 8, 10, 12
fd_coefficients_(Taylor=1;Holberg=2)_(FDCOEFF) = 2
#
#-------------------Time Stepping -------------------------------
time_of_wave_propagation_(in_sec)_(TIME) = 0.06
timestep_(in_seconds)_(DT) = 5.0e-5
#
#--------------------Source---------------------------------------
# Shape_of_source-signal:
(ricker=1;fumue=2;from_SIGNAL_FILE=3;SIN**3=4;deltapulse=5)_(QUELLART) = 4
point_source_(explosive=1;force_in_x=2;in_y=3;in_z=4;custom=5)_(QUELLTYP) = 4
# If QUELLTYP <5 the following two lines are ignored
force_angle_between_x_y_(in_degree)_(ALPHA) = 45.0
force_angle_between_x_z_(in_degree)_(BETA) =  45.0
# Plane wave (PW) excitation,if PLANE_WAVE_DEPTH>0, SRCREC is treated as 0
depth_of_PW_excitation_(no<=0)_(in_meter)_(PLANE_WAVE_DEPTH) = 0.0direct.com/
dip_of_PW_from_vertical_(in_degrees)_(PHI) =0.0
duration_of_source-signal_PW_(in_seconds)_(TS) = 0.0033
# External signal input instead of QUELLART
SIGNAL_FILE = ?
read_source_positions_from_SOURCE_FILE_(yes=1)_(SRCREC) = 1
SOURCE_FILE = ./sources/sources_toy.dat  
run_multiple_shots_defined_in_SOURCE_FILE_(yes=1)_(RUN_MULTIPLE_SHOTS) = 1
#--------------------- Model (Input) -------------------------------------
read_model_from_MFILE(yes=1)(READMOD) = 0
MFILE = model/toy
#
#---------------------Q-approximation-----------------------------
Number_of_relaxation_mechanisms_(L) = 0
# (L=0: elastic, FWI only tested for L=0)
L_Relaxation_frequencies_(FL) = 1000.0 
Tau_value_for_entire_model_(TAU) = 0.000001
#
#----------------------Free Surface-------------------------------
free_surface_(yes=1)(FREE_SURF) = 0
#
#--------------------Absorbing Boundary---------------------------
# exponential damping applied
type_of_boundary_condition_(ABS_TYPE)_(PML=1/ABS=2) = 1
width_of_absorbing_frame_(in_grid_points)_(No<=0)_(FW) = 10
percentage_of_amplitude_decay_at_outer_edge_(DAMPING) = 8.0
# parameter for PML:
Dominant_frequency_(in_Hz)_(FPML) = 200.0
P_wave_velocity_near_the_grid_boundary(in_m/s)_(VPPML) = 6200.0
# apply_periodic_boundary_condition_at_edges_(BOUNDARY):
(no=0)_(left/right/front/back=1) = 0
#
#----------------------Snapshots----------------------------------
output_of_snapshots_(SNAP)(yes>0) = 0
# output of particle velocities: SNAP=1
# output of pressure field: SNAP=2
# output of curl and divergence energy: SNAP=3
# output of both particle velocities and energy : SNAP=4
first_snapshot_(in_sec)_(TSNAP1) = 0.01
last_snapshot_(in_sec)_(TSNAP2) = 0.24
increment_(in_sec)_(TSNAPINC) = 0.0075
# Note that z denotes the vertical direction !
increment_x-direction_(IDX) = 1
increment_y-direction_(IDY) = 1
increment_z-direction_(IDZ) = 1
data-format_(SNAP_FORMAT)(ASCII(2);BINARY(3)) = 4
basic_filename_(SNAP_FILE) = ./snap/back
#output will look like SNAP_FILE.bin.z.000
#if SNAP = 1,2 the following line is ignored
(SNAP_PLANE) = 1
#output of snapshots as energy wihout sign SNAP_PLANE=1
#energy with sign true for x-z-plane SNAP_PLANE=2
#energy with sign true for x-y-plane SNAP_PLANE=3
#energy with sign true for y-z-plane SNAP_PLANE=4
#
#----------------------Receiver-----------------------------------
output_of_seismograms_(SEISMO) = 1
# SEISMO=0: no seismograms
# SEISMO=1: particle-velocities
# SEISMO=2: pressure (hydrophones)
# SEISMO=3: curl and div
# SEISMO=4: everything
# Warning: "curl" is not really curl in 3D
read_receiver_positions_from_file_(yes=1)_(READREC) = 0
REC_FILE = ./receiver/receiver.dat
reference_point_for_receiver_coordinate_system_(REFREC) = 0.0 , 0.0 , 0.0
# if READREC=1 the following three lines are ignored 
# Note that z denotes the vertical direction !
position_of_first_receiver_(in_m)_(XREC1,YREC1,ZREC1) =  90.0 , 90.0 , 90.0
position_of_last_receiver_(in_m)_(XREC2,YREC2,ZREC2)  =  90.0 , 90.0 , 90.0
distance_between_two_adjacent_receivers_(in_gridpoints)_(NGEOPH) = 1
# (Caution: receivers outside the grid may cause surprising results!)
#
#-------------------- Receiver array -------------------------------
# parameters for horizontal plane of receivers
number_of_planes_(no<=0)_(REC_ARRAY) = 1
depth_of_first_(upper)_plane_(in_m)_(REC_ARRAY_DEPTH) = 24.0
vertical_distance_between_planes_(in_m)_(REC_ARRAY_DIST) = 30.0 
distance_between_receivers_in_x-direction_(in_gridpoints)_(DRX) = 10
distance_between_receivers_in_y-direction_(in_gridpoints)_(DRY) = 10
#
#--------------------  Seismogram Output-----------------------------
samplingrate_and_timelag_(in_timesteps!)_(NDT,NDTSHIFT) = 1 , 0
# write every (ndt)th sample, leaving ndtshift samples at the beginning out
# default: ndt=1 and ndtshift=0. (ndt=0 is set to ndt=1, ndt<0 are set to -ndt.)
#
data-format_(SEIS_FORMAT[6]) = 1
#  0: SEG-Y (ASCII-text/native 4-byte-floats (IEEE on PC)/little endian on PC)
#  1: SU (native 4-byte-floats (IEEE on PC)/little endian on PC)
#  2: TEXTUAL (native ASCII)
#  3: BINARY (IEEE-4-byte-floats on PC/little endian on PC)
#  4: SEG-Y (ASCII-text/native 4-byte-floats (IEEE on PC)/little endian on PC)
#  5: SEG-Y (ASCII-text/IBM-4-byte-floats on PC/big endian on PC) 
#
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basic_filename_(SEIS_FILE) = ./su_obs/obs_toy
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#
#------------------------ Method --------------------------------
#
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method_(METHOD) = 0
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# 0: only forward simulation
# 1: conjugate_gradient_FWI
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#-----------------------------------------------------------------------------------
#------------------------ INVERSION PARAMETERS --------------------------------------
#-----------------------------------------------------------------------------------
#
#-------------------------In- and Output Files--------------------------------------
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gradient_filename_(GRAD_FILE) = ./grad/toy_grad
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model_output_filename_(MOD_OUT_FILE) = ./model/toy
observed_data_fileneame_(SEIS_OBS_FILE) = ./su_obs/obs_toy
external_or_internal_observed_data_(EXTOBS) = 0
inversion_parameter_file_(INV_FILE) = ./in_and_out/workflow_toy.dat
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hessian_file_(HESS_FILE) = ./hess/toy_hess
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#
#-------------------------General---------------------------------------------------
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minimum/maximum_iteration_number_(>0)_(ITMIN,ITMAX) = 1 , 60
filtering_(yes=1/no=0)_(FILT) = 0
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maximum_number_frequencies_per_iteration_(NFMAX) = 5
number_of_timestep_per_period_used_for_inversion_(TAST) = 100
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average_model_parameter_(VP0,VS0,RHO0) = 6200.0, 3600.0, 2800.0
# velocities  in m/s, density in kg/m³
parameter_class_weighting_factors_for_vp/vs/rho_(WEIGHT) = 1.0, 1.0, 0.0
# choose from 1.0 (full update) to 0.0 (no update)
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#
#------------------------Steplength estimation----------------------------------------
number_of_shots_used_for_steplength_estimation_(NSHOTS_STEP) = 4
initial_test_steplength_(TESTSTEP) = 0.02
#
#------------------------Gradient preconditioning-------------------------------------
Type_of_preconditioning_(DAMPTYPE) = 2
# 0: no damping
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# 1: Circular taper around receivers
# 2: Circular taper around sources and receivers
# 3: Tapering of source and receiver planes
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#
#------------------------Hessian ----------------------------------------
Apply_Hessian_(yes=1/no=0)_(HESS) = 0
Read_Hessian_from_file_(READ_HESS) = 0
Part_of_receivers_used_for_Hessian_(REC_HESS) = 1 
#(Each REC_HESS Receiver is used to calculate the Hessian, not yet implemented)
Water_level_Hessian_for_vp/vs/rho_(WATER_HESS) = 0.0192, 0.0192, 1.0e-14
# 
#------------------------L-BFGS ----------------------------------------
Apply_L_BFGS_(LBFGS) = 0
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Number_of_inverted_parameters_(NUMPAR) = 2
Number_iterations_used_for_LBFGS_(BFGSNUM) = 5