diff --git a/.gitattributes b/.gitattributes
index 18fb6d753473771466372e2c90722cd81ab85532..df50dbe029123b8b20367822981428f91dd3ae34 100755
--- a/.gitattributes
+++ b/.gitattributes
@@ -4,3 +4,5 @@ tests/keplerian-orbits-2-0.h5 filter=lfs diff=lfs merge=lfs -text
tests/esa-trailing-orbits-2-0.h5 filter=lfs diff=lfs merge=lfs -text
tests/keplerian-fplan-1-1.h5 filter=lfs diff=lfs merge=lfs -text
tests/esa-trailing-fplan-1-1.h5 filter=lfs diff=lfs merge=lfs -text
+tests/gws-1-1.h5 filter=lfs diff=lfs merge=lfs -text
+tests/gws-2-0-dev.h5 filter=lfs diff=lfs merge=lfs -text
diff --git a/tests/gws-1-1.h5 b/tests/gws-1-1.h5
new file mode 100644
index 0000000000000000000000000000000000000000..c8c5979379be7bd8086f2a833422d0ea251fb248
--- /dev/null
+++ b/tests/gws-1-1.h5
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:95a12c32a7ab80c75e88d67329e7840760eff990a180a79360da6b1d0f74d150
+size 28672
diff --git a/tests/gws-2-0-dev.h5 b/tests/gws-2-0-dev.h5
new file mode 100644
index 0000000000000000000000000000000000000000..6abce64b1ca22d69e56f7473e8b8d36c60ec901d
--- /dev/null
+++ b/tests/gws-2-0-dev.h5
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b14f934a46606fffe413bfa4baaf461162ff76346f546b09c5cfb7895d1b8f41
+size 20272
diff --git a/tests/test_gws.py b/tests/test_gws.py
new file mode 100644
index 0000000000000000000000000000000000000000..5951f04988b7fe7ec56b7445ac885552aee90f5e
--- /dev/null
+++ b/tests/test_gws.py
@@ -0,0 +1,164 @@
+#! /usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""Test reading of GW response and GW files."""
+
+import numpy as np
+from pytest import approx
+from h5py import File
+from lisainstrument import Instrument
+
+
+def test_no_gws():
+ """Test that we simulate without GWs."""
+
+ instru = Instrument(size=100, gws=None)
+ instru.disable_all_noises()
+
+ assert instru.gw_file is None
+ for mosa in instru.MOSAS:
+ assert instru.gws[mosa] == 0
+
+ instru.simulate()
+
+ for mosa in instru.MOSAS:
+ assert instru.distant_carrier_fluctuations[mosa] == approx(0)
+ assert instru.distant_usb_fluctuations[mosa] == approx(0)
+ assert instru.tps_isi_carrier_fluctuations[mosa] == approx(0)
+ assert instru.tps_isi_usb_fluctuations[mosa] == approx(0)
+ assert instru.isi_carrier_fluctuations[mosa] == approx(0)
+ assert instru.isi_usb_fluctuations[mosa] == approx(0)
+
+def test_dict_of_gws():
+ """Test that we pass link responses in a dictionary."""
+
+ responses = {
+ mosa: np.random.normal(size=100 * 16)
+ for mosa in Instrument.MOSAS
+ }
+
+ instru = Instrument(size=100, lock='six', gws=responses)
+ instru.disable_all_noises()
+
+ assert instru.gw_file is None
+ for mosa in instru.MOSAS:
+ assert np.all(instru.gws[mosa] == responses[mosa])
+
+ instru.simulate()
+
+ for mosa in instru.MOSAS:
+ assert approx(instru.distant_carrier_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_carrier_offsets[mosa]) * responses[mosa]
+ assert approx(instru.distant_usb_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_usb_offsets[mosa]) * responses[mosa]
+ assert approx(instru.tps_isi_carrier_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_carrier_offsets[mosa]) * responses[mosa]
+ assert approx(instru.tps_isi_usb_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_usb_offsets[mosa]) * responses[mosa]
+
+def test_gw_file_1_1():
+ """Test that we can read GW files v1.1 with orbit files v1.0.2.
+
+ Test GW file can be generated using LISA GW Response and the following script.
+
+ from h5py import File
+ from lisagwresponse import GalacticBinary
+
+ orbits = 'tests/keplerian-orbits-1-0-2.h5'
+ with File(orbits, 'r') as f:
+ t0 = f.attrs['t0'] + 10
+
+ galbin = GalacticBinary(
+ A=1.0,
+ f=1E-3,
+ orbits=orbits,
+ t0=t0,
+ size=100,
+ gw_beta=0, gw_lambda=0,
+ )
+
+ galbin.write('tests/gws-1-1.h5')
+ """
+
+ gw_file = 'tests/gws-1-1.h5'
+ gwf = File(gw_file, 'r')
+
+ instru = Instrument(
+ size=100,
+ t0=gwf.attrs['t0'],
+ dt=gwf.attrs['dt'],
+ physics_upsampling=1,
+ aafilter=None,
+ lock='six',
+ gws=gw_file,
+ orbits='tests/keplerian-orbits-1-0-2.h5')
+ instru.disable_all_noises()
+
+ assert instru.gw_file is gw_file
+ for mosa in instru.MOSAS:
+ assert instru.gws[mosa] == approx(gwf[f'tcb/l_{mosa}'][:])
+
+ instru.simulate()
+
+ for mosa in instru.MOSAS:
+ assert approx(instru.distant_carrier_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_carrier_offsets[mosa]) * gwf[f'tcb/l_{mosa}'][:]
+ assert approx(instru.distant_usb_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_usb_offsets[mosa]) * gwf[f'tcb/l_{mosa}'][:]
+ assert approx(instru.tps_isi_carrier_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_carrier_offsets[mosa]) * gwf[f'tcb/l_{mosa}'][:]
+ assert approx(instru.tps_isi_usb_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_usb_offsets[mosa]) * gwf[f'tcb/l_{mosa}'][:]
+
+def test_gw_file_2_0_dev():
+ """Test that we can read GW files v2.0.dev with orbit files v2.0.
+
+ Test GW file can be generated using LISA GW Response and the following script.
+
+ from h5py import File
+ from lisagwresponse import GalacticBinary
+
+ orbits = 'tests/keplerian-orbits-2-0.h5'
+ with File(orbits, 'r') as f:
+ t0 = f.attrs['t0'] + 10
+
+ galbin = GalacticBinary(
+ A=1.0,
+ f=1E-3,
+ orbits=orbits,
+ t0=t0,
+ size=100,
+ gw_beta=0, gw_lambda=0,
+ )
+
+ galbin.write('tests/gws-2-0-dev.h5')
+ """
+
+ gw_file = 'tests/gws-2-0-dev.h5'
+ gwf = File(gw_file, 'r')
+
+ instru = Instrument(
+ size=100,
+ t0=gwf.attrs['t0'],
+ dt=gwf.attrs['dt'],
+ physics_upsampling=1,
+ aafilter=None,
+ lock='six',
+ gws=gw_file,
+ orbits='tests/keplerian-orbits-2-0.h5')
+ instru.disable_all_noises()
+
+ assert instru.gw_file is gw_file
+ for imosa, mosa in enumerate(instru.MOSAS):
+ assert instru.gws[mosa] == approx(gwf['tcb/y'][:, imosa])
+
+ instru.simulate()
+
+ for imosa, mosa in enumerate(instru.MOSAS):
+ assert approx(instru.distant_carrier_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_carrier_offsets[mosa]) * gwf['tcb/y'][:, imosa]
+ assert approx(instru.distant_usb_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_usb_offsets[mosa]) * gwf['tcb/y'][:, imosa]
+ assert approx(instru.tps_isi_carrier_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_carrier_offsets[mosa]) * gwf['tcb/y'][:, imosa]
+ assert approx(instru.tps_isi_usb_fluctuations[mosa]) == \
+ -(instru.central_freq + instru.local_usb_offsets[mosa]) * gwf['tcb/y'][:, imosa]