Initial commit

change 1e-2 to 'ftol' in CalSurfG.f90, which may cause problem with small study region (~2 km)

scripts/GenerateTrueMOD.py

@@ -0,0 +1,42 @@
+#!/usr/bin/env python
+# the checkerboard should use the initial model as background model, then add 
+# some pertubations 
+# remember to move MOD.true to the directory where you want to run DSurfTomo
+import numpy as np
+import matplotlib.pyplot as plt
+#parameters you need to change
+#start
+nx=18
+ny=18
+nz=9
+minvel=0.9
+velgrad=0.6
+dep1=[0,0.2,0.4,0.6,0.8,1.1,1.4,1.8,2.5]
+anosize=1.0
+amplitude=0.4
+#end
+x=range(1,nx+1)
+y=range(1,ny+1)
+z=range(1,nz+1)
+z=np.ones(nz)
+bg=np.zeros((nz,nx,ny))
+cross=np.zeros((nz,ny))
+vs1=np.zeros(nz)
+xy=np.kron(np.sin(anosize*np.array(y)),np.sin(anosize*np.array(x)))
+xyz=np.kron(z,xy)
+pxy=xyz.reshape(nz,nx,ny)
+for k in range(nz):
+  for j in range(ny):
+    for i in range(nx):
+      bg[k,i,j]= minvel+dep1[k]*velgrad
+mod=np.zeros((nz*ny,nx))
+for k in range(nz):
+  for j in range(ny):
+    for i in range(nx):
+	mod[(k)*ny+j,i]=bg[k,i,j]+pxy[k,i,j]*amplitude
+k=5
+plt.imshow(mod[k*ny:(k+1)*ny,:],cmap='jet_r',interpolation='bicubic')
+np.savetxt('MOD.true',mod,fmt='%4.4f')
+plt.colorbar()
+plt.show()
+