mirror of
https://github.com/wassname/simpeg.git
synced 2026-06-27 19:48:52 +08:00
Rowan Cockett
558e8879fe
Merge branch 'move2Simpeg' of https://github.com/simpeg/simpegmt into mt/dev Conflicts: .gitignore .travis.yml LICENSE docs/conf.py docs/index.rst requirements.txt setup.py
47 lines
1.9 KiB
Python
47 lines
1.9 KiB
Python
import SimPEG as simpeg, numpy as np
|
|
|
|
def homo1DModelSource(mesh,freq,m_back):
|
|
'''
|
|
Function that calculates and return background fields for a 3D mesh and model.
|
|
The calculuations use 1D field solution for a vertical slice throught model (south-western most column),
|
|
which is assigned at the fields everywhere for the respective polarizations.2
|
|
|
|
:param Simpeg mesh object mesh: Holds information on the discretization
|
|
:param float freq: The frequency to solve at
|
|
:param np.array m_back: Background model of conductivity to base the calculations on.
|
|
:rtype: numpy.ndarray (mesh.nE,2)
|
|
:return: eBG_bp, E fields for the background model at both polarizations.
|
|
|
|
'''
|
|
|
|
# import
|
|
from SimPEG.MT.Utils import get1DEfields
|
|
# Get a 1d solution for a halfspace background
|
|
mesh1d = simpeg.Mesh.TensorMesh([mesh.hz],np.array([mesh.x0[2]]))
|
|
# Note: Everything is using e^iwt
|
|
e0_1d = get1DEfields(mesh1d,mesh.r(m_back,'CC','CC','M')[0,0,:],freq)
|
|
# Setup x (east) polarization (_x)
|
|
ex_px = np.zeros(mesh.vnEx,dtype=complex)
|
|
ey_px = np.zeros((mesh.nEy,1),dtype=complex)
|
|
ez_px = np.zeros((mesh.nEz,1),dtype=complex)
|
|
# Assign the source to ex_x
|
|
for i in np.arange(mesh.vnEx[0]):
|
|
for j in np.arange(mesh.vnEx[1]):
|
|
ex_px[i,j,:] = -e0_1d
|
|
eBG_px = np.vstack((simpeg.Utils.mkvc(ex_px,2),ey_px,ez_px))
|
|
# Setup y (north) polarization (_py)
|
|
ex_py = np.zeros((mesh.nEx,1), dtype='complex128')
|
|
ey_py = np.zeros(mesh.vnEy, dtype='complex128')
|
|
ez_py = np.zeros((mesh.nEz,1), dtype='complex128')
|
|
# Assign the source to ey_py
|
|
|
|
for i in np.arange(mesh.vnEy[0]):
|
|
for j in np.arange(mesh.vnEy[1]):
|
|
ey_py[i,j,:] = e0_1d
|
|
# ey_py[1:-1,1:-1,1:-1] = 0
|
|
eBG_py = np.vstack((ex_py,simpeg.Utils.mkvc(ey_py,2),ez_py))
|
|
|
|
# Return the electric fields
|
|
eBG_bp = np.hstack((eBG_px,eBG_py))
|
|
return eBG_bp
|