Bugfix: Timeshift of sinus3

The sinus3 source wavelet was shifted in the wrong direction.

src/stf.c

@@ -253,7 +253,7 @@ void stf(FILE *fp, float **sectionvy, float ** sectionvy_obs, float ** sectionvy
                 case 4 :
                 /* sinus raised to the power of three */
                 if ((t<tshift) || (t>(tshift+ts))) amp=0.0;
-                else amp=pow(sin(PI*(t+tshift)/ts),3.0);
+                else amp=pow(sin(PI*(t-tshift)/ts),3.0);
                 break;
                 
                 break;

src/wavelet.c

@@ -82,7 +82,7 @@ float ** wavelet(float ** srcpos_loc, int nsrc, int ishot, int SH, int STF){
                     case 4 :
                         /* sinus raised to the power of three */
                         if ((t<tshift) || (t>(tshift+ts))) amp=0.0;
-                        else amp=pow(sin(PI*(t+tshift)/ts),3.0);
+                        else amp=pow(sin(PI*(t-tshift)/ts),3.0);
                         break;
                         
                         break;
@@ -177,7 +177,7 @@ float ** wavelet(float ** srcpos_loc, int nsrc, int ishot, int SH, int STF){
                     case 4 :
                         /* sinus raised to the power of three */
                         if ((t<tshift) || (t>(tshift+ts))) amp=0.0;
-                        else amp=pow(sin(PI*(t+tshift)/ts),3.0);
+                        else amp=pow(sin(PI*(t-tshift)/ts),3.0);
                         break;
                         
                         break;