improve the raise of error when the integration time window for the first...

improve the raise of error when the integration time window for the first observation starts before the temporal domain

src/source_localization/obs.py

@@ -156,11 +156,7 @@ class Obs:
 
         self.dt_obs_operator = dt_obs_operator
         self.nb_dt_in_obs_time_window = int((self.dt_obs_operator // self.msh.dt) + 1)
-        if np.min(self.t_obs) < self.dt_obs_operator:
-            raise ValueError(
-                "The time window of integration of the observation operator for the first observation starts before the temporal domain."
-                + " This is probably because the integration time window is too large or the observation times are inaccurate."
-            )
+        # self.nb_dt_in_obs_time_window = int(np.ceil(dt_obs_operator / msh.dt))
         # Exception to make sure that the accumulation time windows do not overlapp for a given sensor
         for X_sensor in self.X_sensors:
             indexes_sensor = [x == X_sensor[0] and y == X_sensor[1] for x, y in zip(self.X_obs[:, 0], self.X_obs[:, 1])]
@@ -183,6 +179,11 @@ class Obs:
             np.abs(self.t_obs.reshape((self.N_obs, 1)) - msh.t_array.reshape((1, msh.t_array.size))), axis=1
         )
         for i in range(1, self.nb_dt_in_obs_time_window):
+            if (self.index_obs_to_index_time_est[:, i - 1] <= 0).any():
+                raise ValueError(
+                    "The time window of integration of the observation operator for the first observation starts before the temporal domain."
+                    + " This is probably because the integration time window is too large or the observation times are inaccurate."
+                    )
             self.index_obs_to_index_time_est[:, i] = self.index_obs_to_index_time_est[:, i - 1] - 1
 
         # initialization of the dictionnary containing the indexes of the observations given the time index