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examples: Fix DC component in Ricker source #2743

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3 changes: 2 additions & 1 deletion examples/seismic/source.py
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Original file line number Diff line number Diff line change
Expand Up @@ -274,7 +274,8 @@ def wavelet(self):
t0 = self.t0 or 1 / self.f0
a = self.a or 1
r = (np.pi * self.f0 * (self.time_values - t0))
return a * (1-2.*r**2)*np.exp(-r**2)
w = a * (1-2.*r**2)*np.exp(-r**2)
return w - w.mean() # Remove DC component


class GaborSource(WaveletSource):
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45 changes: 20 additions & 25 deletions examples/seismic/tutorials/06_elastic.ipynb
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8 changes: 4 additions & 4 deletions tests/test_resample.py
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Original file line number Diff line number Diff line change
Expand Up @@ -29,8 +29,8 @@ def test_resample():

end = min(src_a.data.shape[0], src_c.data.shape[0])

assert np.allclose(src_a.data[:end], src_c.data[:end])
assert np.allclose(src_a.data[:end], src_c.data[:end])
assert np.allclose(src_a.data[:end], src_c.data[:end], atol=3e-6)
assert np.allclose(src_a.data[:end], src_c.data[:end], atol=3e-6)

# Text resampling based on num
src_d = RickerSource(name='src_d', grid=model.grid, f0=f0,
Expand All @@ -42,8 +42,8 @@ def test_resample():
assert np.isclose(src_d._time_range.step, src_e._time_range.step)
assert np.isclose(src_d._time_range.stop, src_e._time_range.stop)
assert src_d._time_range.num == src_e._time_range.num
assert np.allclose(src_d.data, src_e.data)
assert np.allclose(src_d.data, src_e.data)
assert np.allclose(src_d.data, src_e.data, atol=3e-6)
assert np.allclose(src_d.data, src_e.data, atol=3e-6)


if __name__ == "__main__":
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