diff --git a/SimPEG/Examples/EM_FDEM_SusEffects.py b/SimPEG/Examples/EM_FDEM_SusEffects.py index 5021e87f..b7de07bc 100644 --- a/SimPEG/Examples/EM_FDEM_SusEffects.py +++ b/SimPEG/Examples/EM_FDEM_SusEffects.py @@ -5,7 +5,7 @@ from scipy.constants import mu_0 def run(plotIt=True): """ - FDEM: Effects of susceptibility + EM: FDEM: Effects of susceptibility =============================== When airborne freqeuncy domain EM (AFEM) survey is flown over @@ -138,8 +138,9 @@ def run(plotIt=True): axtemp.set_xlim(10, 100.) axtemp.set_title(titles[i]) plt.show() - vizfields(1, primsec="primary", realimag="real") - vizfields(1, primsec="secondary", realimag="real") + return fig, ax + fig1, ax1 = vizfields(1, primsec="primary", realimag="real") + fig2, ax2 = vizfields(1, primsec="secondary", realimag="real") if __name__ == '__main__': run() diff --git a/SimPEG/Examples/__init__.py b/SimPEG/Examples/__init__.py index b821e10b..df65e16b 100644 --- a/SimPEG/Examples/__init__.py +++ b/SimPEG/Examples/__init__.py @@ -1,9 +1,10 @@ # Run this file to add imports. ##### AUTOIMPORTS ##### -import EM_FDEM_SusEffects import DC_PseudoSection_Simulation +import EM_FDEM_1D_Inversion import EM_FDEM_Analytic_MagDipoleWholespace +import EM_FDEM_SusEffects import EM_TDEM_1D_Inversion import FLOW_Richards_1D_Celia1990 import Forward_BasicDirectCurrent @@ -16,8 +17,7 @@ import Mesh_QuadTree_FaceDiv import Mesh_QuadTree_HangingNodes import Mesh_Tensor_Creation - -__examples__ = ["EM_FDEM_SusEffects","DC_PseudoSection_Simulation", "EM_FDEM_Analytic_MagDipoleWholespace", "EM_TDEM_1D_Inversion", "FLOW_Richards_1D_Celia1990", "Forward_BasicDirectCurrent", "Inversion_Linear", "Mesh_Basic_PlotImage", "Mesh_Basic_Types", "Mesh_Operators_CahnHilliard", "Mesh_QuadTree_Creation", "Mesh_QuadTree_FaceDiv", "Mesh_QuadTree_HangingNodes", "Mesh_Tensor_Creation"] +__examples__ = ["DC_PseudoSection_Simulation", "EM_FDEM_1D_Inversion", "EM_FDEM_Analytic_MagDipoleWholespace", "EM_FDEM_SusEffects", "EM_TDEM_1D_Inversion", "FLOW_Richards_1D_Celia1990", "Forward_BasicDirectCurrent", "Inversion_Linear", "Mesh_Basic_PlotImage", "Mesh_Basic_Types", "Mesh_Operators_CahnHilliard", "Mesh_QuadTree_Creation", "Mesh_QuadTree_FaceDiv", "Mesh_QuadTree_HangingNodes", "Mesh_Tensor_Creation"] ##### AUTOIMPORTS ##### diff --git a/docs/examples/EM_FDEM_1D_Inversion.rst b/docs/examples/EM_FDEM_1D_Inversion.rst deleted file mode 100644 index acbc8cdc..00000000 --- a/docs/examples/EM_FDEM_1D_Inversion.rst +++ /dev/null @@ -1,26 +0,0 @@ -.. _examples_EM_FDEM_1D_Inversion: - -.. --------------------------------- .. -.. .. -.. THIS FILE IS AUTO GENEREATED .. -.. .. -.. SimPEG/Examples/__init__.py .. -.. .. -.. --------------------------------- .. - - -EM: FDEM: 1D: Inversion -======================= - -Here we will create and run a FDEM 1D inversion. - - - -.. plot:: - - from SimPEG import Examples - Examples.EM_FDEM_1D_Inversion.run() - -.. literalinclude:: ../../SimPEG/Examples/EM_FDEM_1D_Inversion.py - :language: python - :linenos: diff --git a/docs/examples/EM_FDEM_SusEffects.rst b/docs/examples/EM_FDEM_SusEffects.rst new file mode 100644 index 00000000..47cd3644 --- /dev/null +++ b/docs/examples/EM_FDEM_SusEffects.rst @@ -0,0 +1,41 @@ +.. _examples_EM_FDEM_SusEffects: + +.. --------------------------------- .. +.. .. +.. THIS FILE IS AUTO GENEREATED .. +.. .. +.. SimPEG/Examples/__init__.py .. +.. .. +.. --------------------------------- .. + + +FDEM: Effects of susceptibility +=============================== + +When airborne freqeuncy domain EM (AFEM) survey is flown over +the earth including significantly susceptible bodies (magnetite-rich rocks), +negative data is often observed in the real part of the lowest frequency +(e.g. Dighem system 900 Hz). This phenomenon mostly based upon magnetization +occurs due to a susceptible body when the magnetic field applied. + +To clarify what is happening in the earth when we are exciting the earth with +a loop source in the frequency domain we run three forward modelling: + + - F[:math:`\sigma`, :math:`\mu`]: Anomalous conductivity and susceptibility + - F[:math:`\sigma`, :math:`\mu_0`]: Anomalous conductivity + - F[:math:`\sigma_{air}`, :math:`\mu_0`]: primary field + +We plot vector magnetic fields in the earth. For secondary fields we provide +F[:math:`\sigma`, :math:`\mu`]-F[:math:`\sigma`, :math:`\mu_0`]. Following +figure show only real part, since that is our interest. + + + +.. plot:: + + from SimPEG import Examples + Examples.EM_FDEM_SusEffects.run() + +.. literalinclude:: ../../SimPEG/Examples/EM_FDEM_SusEffects.py + :language: python + :linenos: