change l2_ds to _interim_l3_ds

Co-authored-by: Geet George <g.george@tudelft.nl>

Author: hgloeckner

src/halodrops/processor.py

@@ -957,15 +957,15 @@ def prepare_l2_for_gridded(self):
         (and not lose information)
 
         """
-        l2_ds = self.l2_ds.assign_coords(
+        _interim_l3_ds = self.l2_ds.assign_coords(
             {"launch_time": ("launch_time", [self.launch_time])}
         ).sortby("time")
 
         for attr, value in self.l2_ds.attrs.items():
-            l2_ds[attr] = value
+            _interim_l3_ds[attr] = value
 
-        l2_ds.attrs.clear()
-        object.__setattr__(self, "l2_ds", l2_ds)
+        _interim_l3_ds.attrs.clear()
+        object.__setattr__(self, "_interim_l3_ds", l2_ds)
         return self
 
     def add_q_and_theta_to_l2_ds(self):
@@ -1011,7 +1011,7 @@ def concat_sondes(self):
         """
         function to concatenate all sondes using the combination of all measurement times and launch times
         """
-        list_of_l2_ds = [sonde.l2_ds for sonde in self.sondes.values()]
+        list_of_l2_ds = [sonde._interim_l3_ds for sonde in self.sondes.values()]
         combined = xr.combine_by_coords(list_of_l2_ds)
         object.__setattr__(self, "_interim_l3_ds", combined)
         return self