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https://github.com/wassname/simpeg.git
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Rowan Cockett
57 lines
1.7 KiB
Python
57 lines
1.7 KiB
Python
import unittest
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from SimPEG import Mesh, Utils, np, PF
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import matplotlib.pyplot as plt
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class MagFwdProblemTests(unittest.TestCase):
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def setUp(self):
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cs = 25.
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hxind = [(cs, 5, -1.3), (cs/2.0, 41), (cs, 5, 1.3)]
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hyind = [(cs, 5, -1.3), (cs/2.0, 41), (cs, 5, 1.3)]
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hzind = [(cs, 5, -1.3), (cs/2.0, 40), (cs, 5, 1.3)]
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M = Mesh.TensorMesh([hxind, hyind, hzind], 'CCC')
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chibkg = 0.
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chiblk = 0.01
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chi = np.ones(M.nC)*chibkg
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sph_ind = PF.MagAnalytics.spheremodel(M, 0., 0., 0., 100)
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chi[sph_ind] = chiblk
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model = PF.BaseMag.BaseMagMap(M)
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prob = PF.Magnetics.Problem3D_DiffSecondary(M, mapping=model)
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self.prob = prob
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self.M = M
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self.chi = chi
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def test_ana_forward(self):
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survey = PF.BaseMag.BaseMagSurvey()
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Inc = 45.
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Dec = 45.
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Btot = 51000
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b0 = PF.MagAnalytics.IDTtoxyz(Inc, Dec, Btot)
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survey.setBackgroundField(Inc, Dec, Btot)
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xr = np.linspace(-300, 300, 41)
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yr = np.linspace(-300, 300, 41)
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X, Y = np.meshgrid(xr, yr)
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Z = np.ones((xr.size, yr.size))*150
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rxLoc = np.c_[Utils.mkvc(X), Utils.mkvc(Y), Utils.mkvc(Z)]
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survey.rxLoc = rxLoc
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self.prob.pair(survey)
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u = self.prob.fields(self.chi)
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B = u['B']
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bxa, bya, bza = PF.MagAnalytics.MagSphereAnaFunA(rxLoc[:, 0], rxLoc[:, 1], rxLoc[:, 2], 100., 0., 0., 0., 0.01, b0, 'secondary')
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dpred = survey.projectFieldsAsVector(B)
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err = np.linalg.norm(dpred-np.r_[bxa, bya, bza])/np.linalg.norm(np.r_[bxa, bya, bza])
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self.assertTrue(err < 0.08)
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if __name__ == '__main__':
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unittest.main()
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