diff --git a/gwinc/ifo/noises.py b/gwinc/ifo/noises.py
index 74e4598678a855fc76083862964a4807cb5e7975..37a7c2f8e6ffbd8ce670939740a5facecfe23fa6 100644
--- a/gwinc/ifo/noises.py
+++ b/gwinc/ifo/noises.py
@@ -24,7 +24,18 @@ class Seismic(nb.Noise):
)
def calc(self):
- return noise.seismic.seismic(self.freq, self.ifo)
+ if 'PlatformMotion' in self.ifo.Seismic:
+ if self.ifo.Seismic.PlatformMotion == 'BSC':
+ nt, nr = noise.seismic.seismic_BSC_ISI(self.freq)
+ elif self.ifo.Seismic.PlatformMotion == '6D':
+ nt, nr = noise.seismic.seismic_BSC_ISI_6D(self.freq)
+ else:
+ nt, nr = noise.seismic.seismic_BSC_ISI(self.freq)
+ else:
+ nt, nr = noise.seismic.seismic_BSC_ISI(self.freq)
+ n, nh, nv = noise.seismic.seismic_suspension_fitered(
+ self.ifo.Suspension, nt)
+ return n * 4 * self.ifo.gwinc.dhdl_sqr
class Newtonian(nb.Noise):
diff --git a/gwinc/noise/newtonian.py b/gwinc/noise/newtonian.py
index 0fc6819254ec5bd4d83e5bd0c7d3f9e49e02a401..3ab420304d7c9eab5da6fd1c32ebf02d4ba7a7a4 100644
--- a/gwinc/noise/newtonian.py
+++ b/gwinc/noise/newtonian.py
@@ -4,7 +4,7 @@ import numpy as np
import scipy.integrate as scint
from numpy import pi, sqrt, exp
-from .seismic import seisNLNM
+from .seismic import seismic_ground_NLNM
from .. import const
@@ -131,7 +131,7 @@ def gravg_pwave(f, ifo):
kP = (2 * pi * f) / cP
rho_ground = ifo.Seismic.Rho
- psd_ground_pwave = (levelP * seisNLNM(f))**2
+ psd_ground_pwave = (levelP * seismic_ground_NLNM(f))**2
tmheight = ifo.Seismic.TestMassHeight
xP = np.abs(kP * tmheight)
@@ -165,7 +165,7 @@ def gravg_swave(f, ifo):
kS = (2 * pi * f) / cS
rho_ground = ifo.Seismic.Rho
- psd_ground_swave = (levelS * seisNLNM(f))**2
+ psd_ground_swave = (levelS * seismic_ground_NLNM(f))**2
tmheight = ifo.Seismic.TestMassHeight
xS = np.abs(kS * tmheight)
diff --git a/gwinc/noise/seismic.py b/gwinc/noise/seismic.py
index fbee12da06100d4cecf54220cb6865b3d104079f..ac856f713b1f183a1a83e1f9082443779e61f913 100644
--- a/gwinc/noise/seismic.py
+++ b/gwinc/noise/seismic.py
@@ -1,90 +1,83 @@
+'''Functions to calculate seismic noise in suspended optics.
+
+'''
from __future__ import division
import numpy as np
-from numpy import log10
from scipy.interpolate import PchipInterpolator as interp1d
-def seismic(f, ifo):
- """Seismic noise.
- """
- return seismicAll(f, ifo)[0]
-
+def seismic_suspension_fitered(sus, in_trans):
+ """Seismic displacement noise for single suspended test mass.
-def seismicAll(f, ifo):
- """Seismic noise.
+ :sus: gwinc suspension structure
+ :in_trans: input translational displacement spectrum
- Return (noise, noise_vertical, noise_horizontal)
+ :returns: tuple of displacement noise power spectrum at :f:, and
+ horizontal and vertical components.
"""
- hTable = ifo.Suspension.hTable
- vTable = ifo.Suspension.vTable
-
- theta = ifo.Suspension.VHCoupling.theta
-
- # noise input, horizontal and vertical
- if 'PlatformMotion' in ifo.Seismic:
- if ifo.Seismic.PlatformMotion == 'BSC':
- nt, nr = seisBSC(f)
- elif ifo.Seismic.PlatformMotion == '6D':
- nt, nr = seis6D(f)
- else:
- nt, nr = seisBSC(f)
- else:
- nt, nr = seisBSC(f)
+ hTable = sus.hTable
+ vTable = sus.vTable
+
+ theta = sus.VHCoupling.theta
# horizontal noise total
- nh = (abs(hTable)**2) * nt**2
+ nh = (abs(hTable)**2) * in_trans**2
# vertical noise total
- nv = (abs(theta * vTable)**2) * nt**2
+ nv = (abs(theta * vTable)**2) * in_trans**2
# new total noise
n = nv + nh
- # Convert into Strain PSD (4 TMs)
- nh *= 4 * ifo.gwinc.dhdl_sqr
- nv *= 4 * ifo.gwinc.dhdl_sqr
- n *= 4 * ifo.gwinc.dhdl_sqr
-
return n, nh, nv
-def seisBSC(f):
- """Rough ISI noise source spectra.
+def seismic_BSC_ISI(f):
+ """Rough seismic noise spectra on aLIGO BSC ISI table.
+
+ :f: frequency array in Hz
- Returns ISI (translational, rotational) DOFs
+ :returns: tuple of displacement noise power spectrum at :f: for
+ translational and rotational DOFs.
"""
SEI_F = np.array([0.01, 0.03, 0.1, 0.2, 0.5, 1, 10, 30, 300])
# translational DOFs
SEI_T = np.array([3e-6, 1e-6, 2e-7, 2e-7, 8e-10, 1e-11, 3e-13, 3e-14, 3e-14])
- nt = 10**(interp1d(SEI_F, log10(SEI_T))(f))
+ nt = 10**(interp1d(SEI_F, np.log10(SEI_T))(f))
# rotational DOFs
SEI_R = np.array([1e-8, 3e-8, 2e-8, 1e-8, 4e-10, 1e-11, 3e-13, 3e-14, 3e-14])
- nr = 10**(interp1d(SEI_F, log10(SEI_R))(f))
+ nr = 10**(interp1d(SEI_F, np.log10(SEI_R))(f))
return nt, nr
-def seis6D(f):
- """ISI noise source spectra with a 6D seismometer.
+def seismic_BSC_ISI_6D(f):
+ """Rough seismic noise spectra on aLIGO BSC ISI table with a 6D seismometer.
This largely follows Mow-Lowry and Martynov, arXiv:1801.01468.
+ :f: frequency array in Hz
+
+ :returns: tuple of displacement noise power spectrum at :f: for
+ translational and rotational DOFs.
+
"""
+ # FIXME: merge this with above, using flag
SEI_F = np.array([0.01, 0.03, 0.1, 0.2, 0.5, 1, 10, 100, 300])
SEI_T_self = np.array([1e-7, 1e-9, 3e-11, 6e-12, 3e-13, 1e-13, 3e-14, 1e-14, 1e-14])
- nt_self = 10**(interp1d(SEI_F, log10(SEI_T_self))(f))
- nt_gnd = 10*seisNLNM(f)
+ nt_self = 10**(interp1d(SEI_F, np.log10(SEI_T_self))(f))
+ nt_gnd = 10*seismic_ground_NLNM(f)
blend_t = np.abs(100/(1+1j*f/0.01)**4)
nt = np.sqrt(nt_self**2 + (blend_t * nt_gnd)**2)
SEI_R_self = np.array([2e-11, 5e-12, 1e-12, 6e-13, 3e-13, 2e-13, 6e-14, 2e-14, 2e-14])
- nr_self = 10**(interp1d(SEI_F, log10(SEI_R_self))(f))
+ nr_self = 10**(interp1d(SEI_F, np.log10(SEI_R_self))(f))
nr_gnd = np.abs(1e-7/(1+1j*f/0.001))
blend_r = np.abs(100/(1+1j*f/0.01)**4)
nr = np.sqrt(nr_self**2 + (blend_r * nr_gnd)**2)
@@ -92,35 +85,39 @@ def seis6D(f):
return nt, nr
-def seisNLNM(f):
- """The Peterson New Low-Noise Model.
+def seismic_ground_NLNM(f):
+ """The Peterson new generic ground motion low noise model.
+
+ :f: frequency array in Hz
- Returns a displacement ASD.
+ :returns: displacement noise amplitude spectrum at :f:
"""
Pl = np.array([
- 1.00e-02, 1.00e-01, 1.70e-01, 4.00e-01, 8.00e-01, 1.24e+00,
- 2.40e+00, 4.30e+00, 5.00e+00, 6.00e+00, 1.00e+01, 1.20e+01,
- 1.56e+01, 2.19e+01, 3.16e+01, 4.50e+01, 7.00e+01, 1.01e+02,
- 1.54e+02, 3.28e+02, 6.00e+02, 1.00e+04])
+ 1.00e-02, 1.00e-01, 1.70e-01, 4.00e-01, 8.00e-01, 1.24e+00,
+ 2.40e+00, 4.30e+00, 5.00e+00, 6.00e+00, 1.00e+01, 1.20e+01,
+ 1.56e+01, 2.19e+01, 3.16e+01, 4.50e+01, 7.00e+01, 1.01e+02,
+ 1.54e+02, 3.28e+02, 6.00e+02, 1.00e+04])
Al = np.array([
- -156.72, -162.36, -166.7 , -170. , -166.4 , -168.6 , -159.98,
- -141.1 , -71.36, -97.26, -132.18, -205.27, -37.65, -114.37,
- -160.58, -187.5 , -216.47, -185. , -168.34, -217.43, -258.28,
- -346.88])
+ -156.72, -162.36, -166.7, -170.0, -166.4, -168.6, -159.98,
+ -141.1, -71.36, -97.26, -132.18, -205.27, -37.65, -114.37,
+ -160.58, -187.5, -216.47, -185.0, -168.34, -217.43, -258.28,
+ -346.88])
Bl = np.array([
- 5.64, 5.64, 0. , -8.3 , 28.9 , 52.48, 29.81,
- 0. , -99.77, -66.49, -31.57, 36.16, -104.33, -47.1 ,
- -16.28, 0. , 15.7 , 0. , -7.61, 11.9 , 26.6 ,
- 48.75])
+ 5.64, 5.64, 0.0, -8.3, 28.9, 52.48, 29.81,
+ 0.0, -99.77, -66.49, -31.57, 36.16, -104.33, -47.1,
+ -16.28, 0.0, 15.7, 0.0, -7.61, 11.9, 26.6,
+ 48.75])
nlnm = 10**(np.interp(1/f, Pl, Al+Bl*np.log10(Pl))/20) / (2 * np.pi * f)**2
return nlnm
-def seisNHNM(f):
- """The Peterson New High-Noise Model.
+def seismic_ground_NHNM(f):
+ """The Peterson new generic ground motion high noise model.
- Returns a displacement ASD.
+ :f: frequency array in Hz
+
+ :returns: displacement noise amplitude spectrum at :f:
"""
@@ -128,16 +125,16 @@ def seisNHNM(f):
1.00e-01, 2.20e-01, 3.20e-01, 8.00e-01, 3.80e+00,
4.60e+00, 6.30e+00, 7.90e+00, 1.54e+01, 2.00e+01,
3.54e+02,
- ])
+ ])
Al = np.array([
-108.73, -150.34, -122.31, -116.85, -108.48,
- -74.66, 0.66, -93.37, 73.54, -151.52,
+ -74.66, 0.66, -93.37, 73.54, -151.52,
-206.66,
])
Bl = np.array([
- -17.23, -80.50, -23.87, 32.51, 18.08,
- -32.95, -127.18, -22.42, -162.98, 10.01,
- 31.63,
+ -17.23, -80.50, -23.87, 32.51, 18.08,
+ -32.95, -127.18, -22.42, -162.98, 10.01,
+ 31.63,
])
nhnm = 10**(np.interp(1/f, Pl, Al+Bl*np.log10(Pl))/20) / (2 * np.pi * f)**2
return nhnm