diff --git a/src/od/process/conf.rs b/src/od/process/conf.rs
index 60291c5b..1575b419 100644
--- a/src/od/process/conf.rs
+++ b/src/od/process/conf.rs
@@ -22,8 +22,12 @@ use std::convert::TryFrom;
 use std::default::Default;
 use std::fmt;
 
+#[cfg(feature = "python")]
+use pyo3::prelude::*;
+
 /// Defines the stopping condition for the smoother
 #[derive(Clone, Copy, Debug)]
+#[cfg_attr(feature = "python", pyclass)]
 pub enum SmoothingArc {
     /// Stop smoothing when the gap between estimate is the provided floating point number in seconds
     TimeGap(Duration),
@@ -35,6 +39,43 @@ pub enum SmoothingArc {
     All,
 }
 
+#[cfg(feature = "python")]
+#[pymethods]
+impl SmoothingArc {
+    #[new]
+    fn py_new(
+        strategy: Option<Epoch>,
+        duration: Option<Duration>,
+        epoch: Option<Epoch>,
+    ) -> Result<Self, NyxError> {
+        if let Some(strategy) = strategy {
+            match strategy.to_lowercase().trim() {
+                "all" => Ok(Self::All),
+                "prediction" => Ok(Self::Prediction),
+                _ => Err(NyxError::CustomError(format!(
+                    "strategy should be `all` or `prediction`"
+                ))),
+            }
+        } else if Some(duration) = duration {
+            Ok(Self::TimeGap(duration))
+        } else if Some(epoch) = epoch {
+            Ok(Self::Epoch(epoch))
+        } else {
+            Err(NyxError::CustomError(
+                "Smoothing arc strategy not specified",
+            ))
+        }
+    }
+
+    fn __repr__(&self) -> String {
+        format!("{self}")
+    }
+
+    fn __str__(&self) -> String {
+        format!("Smoothing {self}")
+    }
+}
+
 impl fmt::Display for SmoothingArc {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match *self {
@@ -49,6 +90,7 @@ impl fmt::Display for SmoothingArc {
 /// Defines a filter iteration configuration. Allows iterating on an OD solution until convergence criteria is met.
 /// The root mean squared of the prefit residuals ratios is used to assess convergence between iterations.
 #[derive(Clone, Copy, Debug)]
+#[cfg_attr(feature = "python", pyclass)]
 pub struct IterationConf {
     /// The number of measurements to account for in the iteration
     pub smoother: SmoothingArc,
@@ -74,6 +116,52 @@ impl IterationConf {
     }
 }
 
+#[cfg(feature = "python")]
+#[pymethods]
+impl IterationConf {
+    #[new]
+    fn py_new(
+        smoother: SmoothingArc,
+        absolute_tol: Option<f64>,
+        relative_tol: Option<f64>,
+        max_iterations: Option<usize>,
+        max_divergences: Option<usize>,
+        force_failure: Option<bool>,
+    ) -> Self {
+        let mut me = Self::default();
+        me.smoother = smoother;
+        if let Some(abs_tol) = absolute_tol {
+            me.absolute_tol = abs_tol;
+        }
+
+        if let Some(rel_tol) = relative_tol {
+            me.relative_tol = rel_toll
+        }
+
+        if let Some(max_it) = max_iterations {
+            me.max_iterations = max_it;
+        }
+
+        if let Some(max_div) = max_divergences {
+            me.max_divergences = max_div;
+        }
+
+        if let Some(force_failure) = force_failure {
+            me.force_failure = force_failure;
+        }
+
+        me
+    }
+
+    fn __repr__(&self) -> String {
+        format!("{self}")
+    }
+
+    fn __str__(&self) -> String {
+        format!("Smoothing {self}")
+    }
+}
+
 impl Default for IterationConf {
     /// The default absolute tolerance is 1e-2 (calibrated on an EKF with error).
     fn default() -> Self {
diff --git a/src/python/mission_design/orbit_trajectory.rs b/src/python/mission_design/orbit_trajectory.rs
index a6255384..9965ca6e 100644
--- a/src/python/mission_design/orbit_trajectory.rs
+++ b/src/python/mission_design/orbit_trajectory.rs
@@ -186,6 +186,23 @@ impl OrbitTraj {
         Ok(Self { inner: conv_traj })
     }
 
+    /// Compute the RIC difference between this trajectory and another, writing the output to a parquet file.
+    fn ric_diff_to_parquet(
+        &self,
+        other: &Self,
+        path: String,
+        cfg: Option<ExportCfg>,
+    ) -> Result<String, NyxError> {
+        match self.inner.ric_diff_to_parquet(
+            &other.inner,
+            path,
+            cfg.unwrap_or_else(|| ExportCfg::default()),
+        ) {
+            Ok(path) => Ok(format!("{}", path.to_str().unwrap())),
+            Err(e) => Err(NyxError::CustomError(e.to_string())),
+        }
+    }
+
     fn __add__(&self, rhs: &Self) -> Result<Self, NyxError> {
         let inner = (self.inner.clone() + rhs.inner.clone())?;
 
diff --git a/src/python/orbit_determination/mod.rs b/src/python/orbit_determination/mod.rs
index d6d6e8ae..ad049cfd 100644
--- a/src/python/orbit_determination/mod.rs
+++ b/src/python/orbit_determination/mod.rs
@@ -19,7 +19,7 @@
 use crate::io::tracking_data::DynamicTrackingArc;
 use crate::io::ExportCfg;
 use crate::od::noise::GaussMarkov;
-use crate::od::process::FltResid;
+use crate::od::process::{FltResid, IterationConf, SmoothingArc};
 pub use crate::od::simulator::TrkConfig;
 pub use crate::{io::ConfigError, od::prelude::GroundStation};
 use pyo3::{prelude::*, py_run};
@@ -42,6 +42,8 @@ pub(crate) fn register_od(py: Python<'_>, parent_module: &PyModule) -> PyResult<
     sm.add_class::<OrbitEstimate>()?;
     sm.add_class::<GaussMarkov>()?;
     sm.add_class::<FltResid>()?;
+    sm.add_class::<IterationConf>()?;
+    sm.add_class::<SmoothingArc>()?;
     sm.add_class::<ExportCfg>()?;
     sm.add_function(wrap_pyfunction!(process_tracking_arc, sm)?)?;
     sm.add_function(wrap_pyfunction!(predictor, sm)?)?;
diff --git a/src/python/orbit_determination/process.rs b/src/python/orbit_determination/process.rs
index e31a7cad..edea0941 100644
--- a/src/python/orbit_determination/process.rs
+++ b/src/python/orbit_determination/process.rs
@@ -26,7 +26,7 @@ use crate::{
     md::prelude::{Cosm, Propagator, SpacecraftDynamics},
     od::{
         filter::kalman::KF,
-        process::{EkfTrigger, FltResid, ODProcess},
+        process::{EkfTrigger, FltResid, IterationConf, ODProcess},
     },
     NyxError, Spacecraft,
 };
@@ -54,8 +54,8 @@ pub(crate) fn process_tracking_arc(
     predict_for: Option<Duration>,
     predict_step: Option<Duration>,
     fixed_step: Option<bool>,
+    iter_conf: Option<IterationConf>,
 ) -> Result<String, NyxError> {
-    // TODO: Return a navigation trajectory or use a class that mimics the better ODProcess -- https://github.com/nyx-space/nyx/issues/134
     let msr_noise = Matrix2::from_iterator(measurement_noise);
 
     let init_sc = spacecraft.with_orbit(initial_estimate.0.nominal_state.with_stm());
@@ -83,18 +83,20 @@ pub(crate) fn process_tracking_arc(
 
     let concrete_arc = arc.to_tracking_arc()?;
 
-    odp.process_arc::<GroundStation>(&concrete_arc).unwrap();
+    odp.process_arc::<GroundStation>(&concrete_arc)?;
+
+    if let Some(iter_conf) = iter_conf {
+        odp.iterate_arc::<GroundStation>(&concrete_arc, iter_conf)?;
+    }
 
     if let Some(epoch) = predict_until {
         let max_step =
             predict_step.ok_or_else(|| NyxError::CustomError("predict_step unset".to_string()))?;
-        odp.predict_until(max_step, fixed_step.unwrap_or_else(|| false), epoch)
-            .unwrap();
+        odp.predict_until(max_step, fixed_step.unwrap_or_else(|| false), epoch)?;
     } else if let Some(duration) = predict_for {
         let max_step =
             predict_step.ok_or_else(|| NyxError::CustomError("predict_step unset".to_string()))?;
-        odp.predict_for(max_step, fixed_step.unwrap_or_else(|| false), duration)
-            .unwrap();
+        odp.predict_for(max_step, fixed_step.unwrap_or_else(|| false), duration)?;
     }
 
     let maybe = odp.to_parquet(