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Tx --> Src #1

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8c2cf96
Merge pull request #1 from sgkang/master
rowanc1 Sep 18, 2014
c741966
Merge pull request #2 from sgkang/master
rowanc1 Sep 24, 2014
2230c3e
3 models for refractions
sgkang Sep 24, 2014
730f5f4
Merge branch 'master' of https://github.com/simpeg/simpegSeis
sgkang Sep 24, 2014
046f02f
Fix bug about averaging
sgkang Sep 28, 2014
932deb2
test commit
sgkang Oct 8, 2014
f5900aa
Tx -> Src
lheagy Apr 30, 2015
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40,458 changes: 20,223 additions & 20,235 deletions notebooks/SeismicFWD.ipynb
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12,283 changes: 12,283 additions & 0 deletions notebooks/SeismicRefraction_model1.ipynb
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8,144 changes: 8,144 additions & 0 deletions notebooks/SeismicRefraction_model2.ipynb
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10,514 changes: 10,514 additions & 0 deletions notebooks/SeismicRefraction_model3.ipynb
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96 changes: 49 additions & 47 deletions simpegseis/SeisAcousticTime.py
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,7 @@
import matplotlib.pyplot as plt
from time import clock

class AcousticTx(Survey.BaseTx):
class AcousticSrc(Survey.BaseSrc):


def __init__(self, loc, time, rxList, **kwargs):
Expand Down Expand Up @@ -45,9 +45,9 @@ def Wave(self, tInd):

def getq(self, mesh):

txind = Utils.closestPoints(mesh, self.loc, gridLoc='CC')
srcind = Utils.closestPoints(mesh, self.loc, gridLoc='CC')
q = sdiag(1/mesh.vol)*np.zeros(mesh.nC)
q[txind] = 1.
q[srcind] = 1.

return q

Expand Down Expand Up @@ -80,15 +80,15 @@ class SurveyAcoustic(Survey.BaseSurvey):

"""

def __init__(self, txList,**kwargs):
self.txList = txList
def __init__(self, srcList,**kwargs):
self.srcList = srcList
Survey.BaseSurvey.__init__(self, **kwargs)

def projectFields(self, u):
data = []

for i, tx in enumerate(self.txList):
Proj = tx.rxList[0].getP(self.prob.mesh)
for i, src in enumerate(self.srcList):
Proj = src.rxList[0].getP(self.prob.mesh)
data.append(Proj*u[i])
return data

Expand Down Expand Up @@ -179,7 +179,8 @@ def fields(self, v):

Grad = self.mesh.cellGrad
Div = self.mesh.faceDiv
AvF2CC = self.mesh.aveF2CC
# Be careful about averaging operator
AvF2CC = self.mesh.dim*self.mesh.aveF2CC
rho = 0.27*np.ones(self.mesh.nC)
mu = rho*v**2
DSig = sdiag(self.sig)
Expand All @@ -201,20 +202,20 @@ def fields(self, v):
if self.storefield==True:
P = []
#TODO: parallize in terms of sources
ntx = len(self.survey.txList)
for itx, tx in enumerate(self.survey.txList):
print (" Tx at (%7.2f, %7.2f): %4i/%4i")%(tx.loc[0], tx.loc[0], itx+1, ntx)
nsrc = len(self.survey.srcList)
for isrc, src in enumerate(self.survey.srcList):
print (" Src at (%7.2f, %7.2f): %4i/%4i")%(src.loc[0], src.loc[0], isrc+1, nsrc)
pn = np.zeros(self.mesh.nC)
p0 = np.zeros_like(pn)
un = np.zeros(self.mesh.nF)
u0 = np.zeros_like(un)
time = tx.time
dt = tx.dt
time = src.time
dt = src.dt
p = np.zeros((self.mesh.nC, time.size))
q = tx.getq(self.mesh)
q = src.getq(self.mesh)
for i in range(time.size-1):
sn = tx.Wave(i+1)
s0 = tx.Wave(i)
sn = src.Wave(i+1)
s0 = src.Wave(i)
pn = p0-dt*DSig*p0+Drhoi*dt*(Div*un+(sn-s0)/dt*q)
p0 = pn.copy()
# un = u0 - dt*sdiag(AvF2CC.T*self.sig)*u0 + dt*MfmuiI*Grad*p0
Expand All @@ -232,21 +233,21 @@ def fields(self, v):

Data = []

ntx = len(self.survey.txList)
for itx, tx in enumerate(self.survey.txList):
print (" Tx at (%7.2f, %7.2f): %4i/%4i")%(tx.loc[0], tx.loc[0], itx+1, ntx)
nsrc = len(self.survey.srcList)
for isrc, src in enumerate(self.survey.srcList):
print (" Src at (%7.2f, %7.2f): %4i/%4i")%(src.loc[0], src.loc[0], isrc+1, nsrc)
pn = np.zeros(self.mesh.nC)
p0 = np.zeros_like(pn)
un = np.zeros(self.mesh.nF)
u0 = np.zeros_like(un)
time = tx.time
dt = tx.dt
data = np.zeros((time.size, tx.nD))
q = tx.getq(self.mesh)
Proj = tx.rxList[0].getP(self.mesh)
time = src.time
dt = src.dt
data = np.zeros((time.size, src.nD))
q = src.getq(self.mesh)
Proj = src.rxList[0].getP(self.mesh)
for i in range(time.size-1):
sn = tx.Wave(i+1)
s0 = tx.Wave(i)
sn = src.Wave(i+1)
s0 = src.Wave(i)
pn = p0-dt*DSig*p0+Drhoi*dt*(Div*un+(sn-s0)/dt*q)
p0 = pn.copy()
# un = u0 - dt*sdiag(AvF2CC.T*self.sig)*u0 + dt*MfmuiI*Grad*p0
Expand Down Expand Up @@ -342,7 +343,8 @@ def fields(self, v):
self.mesh.setCellGradBC([['dirichlet', 'neumann'], ['dirichlet', 'neumann']])

Grad = self.mesh.cellGrad
AvF2CC = self.mesh.aveF2CC
# Be careful about averaging operator
AvF2CC = self.mesh.dim*self.mesh.aveF2CC
AvF2CCv = self.mesh.aveF2CCV
rho = 0.27*np.ones(self.mesh.nC)
mu = rho*v**2
Expand Down Expand Up @@ -370,22 +372,22 @@ def fields(self, v):
if self.storefield==True:
Phi = []
#TODO: parallize in terms of sources
ntx = len(self.survey.txList)
for itx, tx in enumerate(self.survey.txList):
print (" Tx at (%7.2f, %7.2f): %4i/%4i")%(tx.loc[0], tx.loc[0], itx+1, ntx)
phi = np.zeros((self.mesh.nC, tx.time.size))
nsrc = len(self.survey.srcList)
for isrc, src in enumerate(self.survey.srcList):
print (" Src at (%7.2f, %7.2f): %4i/%4i")%(src.loc[0], src.loc[0], isrc+1, nsrc)
phi = np.zeros((self.mesh.nC, src.time.size))
phin = np.zeros(self.mesh.nC*2)
phi0 = np.zeros_like(phin)
un = np.zeros(self.mesh.nF)
u0 = np.zeros_like(un)
time = tx.time
dt = tx.dt
q = tx.getq(self.mesh)
time = src.time
dt = src.dt
q = src.getq(self.mesh)
qvec = np.r_[q, q]*1/2

for i in range(time.size-1):
sn = tx.Wave(i+1)
s0 = tx.Wave(i)
sn = src.Wave(i+1)
s0 = src.Wave(i)
phin = phi0-dt*(Msigcc*phi0)+dt*MrhoccI*(1/dt*(sn-s0)*qvec+Divvec*un)
phi0 = phin.copy()
un = u0 - dt*Msigf*u0 + dt*MmuifvecI*Grad*(Ivec*phi0)
Expand All @@ -401,22 +403,22 @@ def fields(self, v):

Data = []

ntx = len(self.survey.txList)
for itx, tx in enumerate(self.survey.txList):
print (" Tx at (%7.2f, %7.2f): %4i/%4i")%(tx.loc[0], tx.loc[0], itx+1, ntx)
nsrc = len(self.survey.srcList)
for isrc, src in enumerate(self.survey.srcList):
print (" Src at (%7.2f, %7.2f): %4i/%4i")%(src.loc[0], src.loc[0], isrc+1, nsrc)
phi = np.zeros((mesh.nC, time.size))
phin = np.zeros(mesh.nC*2)
phi0 = np.zeros_like(phin)
un = np.zeros(mesh.nF)
u0 = np.zeros_like(un)
time = tx.time
dt = tx.dt
time = src.time
dt = src.dt
p = np.zeros((self.mesh.nC, time.size))
q = tx.getq(self.mesh)
q = src.getq(self.mesh)
qvec = np.r_[q, q]*1/2
for i in range(time.size-1):
sn = tx.Wave(i+1)
s0 = tx.Wave(i)
sn = src.Wave(i+1)
s0 = src.Wave(i)
phin = phi0-dt*(Msigcc*phi0)+dt*MrhoccI*(1/dt*(sn-s0)*qvec+Divvec*un)
phi0 = phin.copy()
un = u0 - dt*Msigf*u0 + dt*MmuifvecI*Grad*(Ivec*phi0)
Expand All @@ -436,9 +438,9 @@ def fields(self, v):
dt = time[1]-time[0]
options={'tlag':0.0025, 'fmain':400}
rx = AcousticRx(np.vstack((np.r_[0, 1], np.r_[0, 1])))
tx = AcousticTx(np.r_[0, 1], time, [rx], **options)
survey = SurveyAcoustic([tx])
wave = tx.RickerWavelet()
src = AcousticSrc(np.r_[0, 1], time, [rx], **options)
survey = SurveyAcoustic([src])
wave = src.RickerWavelet()
cs = 0.5
hx = np.ones(150)*cs
hy = np.ones(150)*cs
Expand Down
55 changes: 55 additions & 0 deletions simpegseis/UtilsSeis.py
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Original file line number Diff line number Diff line change
@@ -0,0 +1,55 @@
import numpy as np
import matplotlib.pyplot as plt

def clipsign (value, clip):
clipthese = abs(value) > clip
return value * ~clipthese + np.sign(value)*clip*clipthese

def wiggle (traces, skipt=1,scale=1.,lwidth=.1,offsets=None,redvel=0., manthifts=None, tshift=0.,sampr=1.,clip=10., dx=1., color='black',fill=True,line=True, ax=None):

ns = traces.shape[1]
ntr = traces.shape[0]
t = np.arange(ns)*sampr
timereduce = lambda offsets, redvel, shift: [float(offset) / redvel + shift for offset in offsets]

if (offsets is not None):
shifts = timereduce(offsets, redvel, tshift)
elif (manthifts is not None):
shifts = manthifts
else:
shifts = np.zeros((ntr,))

for i in range(0, ntr, skipt):
trace = traces[i].copy()
trace[0] = 0
trace[-1] = 0

if ax == None:
if (line):
plt.plot(i*dx + clipsign(trace / scale, clip), t - shifts[i], color=color, linewidth=lwidth)
if (fill):
for j in range(ns):
if (trace[j] < 0):
trace[j] = 0
plt.fill(i*dx + clipsign(trace / scale, clip), t - shifts[i], color=color, linewidth=0)
else:
if (line):
ax.plot(i*dx + clipsign(trace / scale, clip), t - shifts[i], color=color, linewidth=lwidth)
if (fill):
for j in range(ns):
if (trace[j] < 0):
trace[j] = 0
ax.fill(i*dx + clipsign(trace / scale, clip), t - shifts[i], color=color, linewidth=0)

def PrimaryWave(x, velocity, tinterp):
return tinterp + 1./velocity*x

def ReflectedWave(x, velocity, tinterp):
time = np.sqrt(x**2/velocity**2+tinterp**2)
return time






1 change: 1 addition & 0 deletions simpegseis/__init__.py
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Original file line number Diff line number Diff line change
@@ -1,2 +1,3 @@
from SeisAcousticTime import *
from UtilsSeis import *