calc_misfit.c 8.24 KB
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/*-----------------------------------------------------------------------------------------
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 * Copyright (C) 2016  For the list of authors, see file AUTHORS.
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 *
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 * This file is part of IFOS.
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 *
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 * IFOS is free software: you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, version 2.0 of the License only.
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 *
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 * IFOS is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with IFOS. See file COPYING and/or <http://www.gnu.org/licenses/gpl-2.0.html>.
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 -----------------------------------------------------------------------------------------*/
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/*------------------------------------------------------------------------
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 *   Calculate Misfit
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 *  ----------------------------------------------------------------------*/
#include "fd.h"

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double calc_misfit(float **sectiondata, float **section, int ntr, int ns, int LNORM, float L2, int itest, int sws, int swstestshot,int ntr_glob, int **recpos_loc, int nsrc_glob, int ishot, int iter, float ** srcpos, int ** recpos){
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    /* declaration of variables */
    extern float DT;
    extern int MYID, USE_WORKFLOW, WORKFLOW_STAGE;
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    extern int TRKILL, NORMALIZE, F_LOW_PASS, TIMEWIN;
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    extern char TRKILL_FILE[STRING_SIZE];
    extern int VELOCITY;
    
    int i,j;
    float l2;
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    int h;
    float abs_section = 0.0, abs_sectiondata = 0.0;
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    float intseis_s, intseis_sd;
    float *picked_times=NULL;
    float **intseis_section=NULL, **intseis_sectiondata=NULL;
    float **intseis_sectiondata_envelope=NULL, **intseis_section_envelope=NULL;
    if(LNORM==8){
        intseis_section_envelope = matrix(1,ntr,1,ns);
        intseis_sectiondata_envelope = matrix(1,ntr,1,ns);
    }
    intseis_section = matrix(1,ntr,1,ns);  /* declaration of variables for integration */
    intseis_sectiondata = matrix(1,ntr,1,ns);
    if(TIMEWIN) picked_times = vector(1,ntr); /* declaration of variables for TIMEWIN */
    
    /* TRACE KILLING */
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    int ** kill_tmp = NULL, *kill_vector = NULL;	/* declaration of variables for trace killing */
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    char trace_kill_file[STRING_SIZE];
    FILE *ftracekill;
    extern int TRKILL_OFFSET;
    extern float TRKILL_OFFSET_LOWER;
    extern float TRKILL_OFFSET_UPPER;
    /*-----------------*/
    /* Start Tracekill */
    /*-----------------*/
    if(TRKILL){
        kill_tmp = imatrix(1,ntr_glob,1,nsrc_glob);
        kill_vector = ivector(1,ntr);
        
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        /*------------------*/
        /* clear kill table */
        /*------------------*/
        for(i=1;i<=nsrc_glob;i++){
            for (j=1; j<=ntr_glob; j++) {
                kill_tmp[j][i]=0;
            }
        }
        
        /* Use ONLY offset based TraceKill */
        if(TRKILL_OFFSET==1) {
            /* Generate TraceKill file on the fly based on the offset from the source */
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            create_trkill_table(kill_tmp,ntr_glob,recpos,nsrc_glob,srcpos,ishot,TRKILL_OFFSET_LOWER,TRKILL_OFFSET_UPPER);
        } else {
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            /* READ TraceKill file from disk */
            
            if(USE_WORKFLOW){
                sprintf(trace_kill_file,"%s_%i.dat",TRKILL_FILE,WORKFLOW_STAGE);
                ftracekill=fopen(trace_kill_file,"r");
                if (ftracekill==NULL){
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                    /* If Workflow TraceKill file not found use File without workflow extensions */
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                    sprintf(trace_kill_file,"%s.dat",TRKILL_FILE);
                    ftracekill=fopen(trace_kill_file,"r");
                    if (ftracekill==NULL){
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                        declare_error(" Trace kill file could not be opened!");
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                    }
                }
            }else{
                sprintf(trace_kill_file,"%s.dat",TRKILL_FILE);
                ftracekill=fopen(trace_kill_file,"r");
                if (ftracekill==NULL){
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                    declare_error(" Trace kill file could not be opened!");
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                }
            }
            
            for(i=1;i<=ntr_glob;i++){
                for(j=1;j<=nsrc_glob;j++){
                    fscanf(ftracekill,"%d",&kill_tmp[i][j]);
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                    if(feof(ftracekill)){
                        declare_error(" Error while reading TraceKill file. Check dimensions!");
                    }
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                }
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            }
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            fclose(ftracekill);
            
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            /* Use Tracekill FILE and add the offset based TraceKill */
            if(TRKILL_OFFSET==2) {
                create_trkill_table(kill_tmp,ntr_glob,recpos,nsrc_glob,srcpos,-100,TRKILL_OFFSET_LOWER,TRKILL_OFFSET_UPPER);
            }
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        }
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        /* Generate local kill vector */
        h=1;
        for(i=1;i<=ntr;i++){
            kill_vector[h] = kill_tmp[recpos_loc[3][i]][ishot];
            h++;
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        }
    }
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    /*---------------*/
    /* End Tracekill */
    /*---------------*/
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    /* Integration of measured and synthetic data  */
    for(i=1;i<=ntr;i++){
        
        intseis_s=0;
        intseis_sd=0;
        if (VELOCITY==0){	/* only integtration if displacement seismograms are inverted */
            for(j=1;j<=ns;j++){
                intseis_s += section[i][j];
                intseis_section[i][j]=intseis_s*DT;
                intseis_sd += sectiondata[i][j];
                intseis_sectiondata[i][j]=intseis_sd*DT;
            }
        }
        else{
            for(j=1;j<=ns;j++){
                intseis_section[i][j]=section[i][j];
                intseis_sectiondata[i][j]=sectiondata[i][j];
            }
        }
        
    }
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    /* TIME WINDOWING */
    if(TIMEWIN==1){
        time_window(intseis_section, iter, ntr_glob,recpos_loc, ntr, ns, ishot);
        time_window(intseis_sectiondata, iter, ntr_glob,recpos_loc, ntr, ns, ishot);
    }
    
    /* NORMALIZE TRACES */
    if(NORMALIZE==1){
        normalize_data(intseis_section,ntr,ns);
        normalize_data(intseis_sectiondata,ntr,ns);
    }
    
    /* calculate envelope for LNORM==8 */
    if (LNORM==8){
        calc_envelope(intseis_sectiondata,intseis_sectiondata_envelope,ns,ntr);
        calc_envelope(intseis_section,intseis_section_envelope,ns,ntr);
    }
    /* end of calculate envelope for LNORM==8 */
    
    /* calculate kind of "energy" */
    
    for(i=1;i<=ntr;i++){
        
        if((TRKILL==1)&&(kill_vector[i]==1))
            continue;
        
        if ((LNORM==5) || (LNORM==7)){
            abs_sectiondata=0.0;
            abs_section=0.0;
            
            for(j=1;j<=ns;j++){
                abs_sectiondata+=intseis_sectiondata[i][j]*intseis_sectiondata[i][j];
                abs_section+=intseis_section[i][j]*intseis_section[i][j];
            }
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            if (abs_sectiondata==0) abs_sectiondata=1;
	    else abs_sectiondata=sqrt(abs_sectiondata);
	    if (abs_section==0) abs_section==1;
            else abs_section=sqrt(abs_section);
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        }
        
        /* calculate L2 residuals */
        
        for(j=1;j<=ns;j++){
            
            if(LNORM==2){
                L2 += (intseis_section[i][j]-intseis_sectiondata[i][j]) * (intseis_section[i][j]-intseis_sectiondata[i][j]);}
            
            if((LNORM==5) || (LNORM==7)){
                L2 -= (intseis_sectiondata[i][j]*intseis_section[i][j]) / (abs_sectiondata*abs_section);}
            
            if(LNORM==8){
                L2 += (intseis_section_envelope[i][j]-intseis_sectiondata_envelope[i][j]) * (intseis_section_envelope[i][j]-intseis_sectiondata_envelope[i][j]);}
            
        }
    }
    
    l2=L2;
    
    /*  printf("\n MYID = %i   IN CALC_MISFIT: L2 = %10.12f \n",MYID,l2); */
    
    /* free memory for integrated seismograms */
    free_matrix(intseis_section,1,ntr,1,ns);
    free_matrix(intseis_sectiondata,1,ntr,1,ns);
    
    /* free memory for time windowing and trace killing */
    if(TIMEWIN==1) free_vector(picked_times,1,ntr);
    if(TRKILL==1){
        free_imatrix(kill_tmp,1,ntr_glob,1,nsrc_glob);
        free_ivector(kill_vector,1,ntr);}
    if(LNORM==8){
        free_matrix(intseis_sectiondata_envelope,1,ntr,1,ns);
        free_matrix(intseis_section_envelope,1,ntr,1,ns);
    }
    return l2;
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} /* end of function */