diff --git a/lisainstrument/instrument.py b/lisainstrument/instrument.py
index 1d5725ab12486a557b44bda50631e2c90a79b42a..26547e369fca63ad2677a530c92f21aae3ef2d7c 100755
--- a/lisainstrument/instrument.py
+++ b/lisainstrument/instrument.py
@@ -91,7 +91,7 @@ class Instrument:
                  sync_asds=2.2E-3,
                  # Tilt-to-length (TTL)
                  ttl_coeffs='default',
-                 sc_jitter_asds=(1E-8, 1E-8, 1E-8), mosa_jitter_asds=1E-8, mosa_angles='default',
+                 sc_jitter_asds=(5E-9, 5E-9, 5E-9), mosa_jitter_asds=(2E-9, 1e-9), mosa_angles='default',
                  dws_asds=7E-8/335,
                  # Pseudo-ranging
                  ranging_biases=0, ranging_asds=3E-9, prn_ambiguity=None,
@@ -159,7 +159,8 @@ class Instrument:
                 distribution [-1.6, 1.6] µm/rad (for local) and [-1.65, 1.65] µm/rad (for distant)
             sc_jitter_asds: tuple of dictionaries of angular jitter amplitude spectral densities
                 for spacecraft, ordered as (yaw, pitch, roll) [rad/sqrt(Hz)]
-            mosa_jitter_asds: dictionary of MOSA yaw jitter amplitude spectral densities [rad/sqrt(Hz)]
+            mosa_jitter_asds: tuple of dictionaries of angular jitter amplitude spectral densities
+                for MOSA, ordered as (yaw, pitch) [rad/sqrt(Hz)]
             mosa_angles: dictionary of oriented MOSA opening angles [deg], or 'default'
             dws_asds: dictionary of amplitude spectral densities for DWS measurement noise [rad/s/sqrt(Hz)]
             ranging_biases: dictionary of ranging noise bias [s]
@@ -360,7 +361,8 @@ class Instrument:
         self.sc_jitter_phi_asds = ForEachSC(sc_jitter_asds[0])
         self.sc_jitter_eta_asds = ForEachSC(sc_jitter_asds[1])
         self.sc_jitter_theta_asds = ForEachSC(sc_jitter_asds[2])
-        self.mosa_jitter_phi_asds = ForEachMOSA(mosa_jitter_asds)
+        self.mosa_jitter_phi_asds = ForEachMOSA(mosa_jitter_asds[0])
+        self.mosa_jitter_eta_asds = ForEachMOSA(mosa_jitter_asds[1])
         self.dws_asds = ForEachMOSA(dws_asds)
 
         # MOSA opening angles
@@ -1461,6 +1463,9 @@ class Instrument:
         self.mosa_jitter_phis = ForEachMOSA(lambda mosa:
             noises.jitter(self.physics_fs, self.physics_size, self.mosa_jitter_phi_asds[mosa])
         )
+        self.mosa_jitter_etas = ForEachMOSA(lambda mosa:
+            noises.jitter(self.physics_fs, self.physics_size, self.mosa_jitter_eta_asds[mosa])
+        )
 
         logger.info("Computing MOSA total angular jitters")
 
@@ -1469,7 +1474,8 @@ class Instrument:
         sin_mosa_angles = (self.mosa_angles * np.pi / 180).transformed(lambda _, x: np.sin(x))
         self.mosa_total_jitter_etas = \
              cos_mosa_angles * self.sc_jitter_etas.for_each_mosa() \
-             + sin_mosa_angles * self.sc_jitter_thetas.for_each_mosa()
+             + sin_mosa_angles * self.sc_jitter_thetas.for_each_mosa() \
+             + self.mosa_jitter_etas
 
         ## Tilt-to-length coupling
         ## TTL couplings are defined as velocities [m/s]