diff --git a/mlair/data_handler/data_handler_wrf_chem.py b/mlair/data_handler/data_handler_wrf_chem.py
index 176fdd8f70f884aca39301a9feec051e9c47234e..e69e63d33e1e6fd785557408cb403d138f89c45a 100644
--- a/mlair/data_handler/data_handler_wrf_chem.py
+++ b/mlair/data_handler/data_handler_wrf_chem.py
@@ -121,14 +121,12 @@ class BaseWrfChemDataLoader:
     def dataset_search_str(self):
         return os.path.join(self.data_path, self.common_file_starter + '*')
 
-    @TimeTrackingWrapper
     def open_data(self):
         logging.debug(f'open data: {self.dataset_search_str}')
         data = xr.open_mfdataset(paths=self.dataset_search_str, combine='nested', concat_dim=self.time_dim_name,
                                  parallel=True)
         self._data = data
 
-    @TimeTrackingWrapper
     def assign_coords(self, coords, **coords_kwargs):
         """
         Assign coords to WrfChemDataHandler._data
@@ -136,7 +134,6 @@ class BaseWrfChemDataLoader:
         """
         self._data = self._data.assign_coords(coords, **coords_kwargs)
 
-    @TimeTrackingWrapper
     def rechunk_data(self, chunks=None, name_prefix='xarray-', token=None, lock=False):
         self._data = self._data.chunk(chunks=chunks, name_prefix=name_prefix, token=token, lock=lock)
 
@@ -157,12 +154,10 @@ class BaseWrfChemDataLoader:
                 status = 'FAIL'
             print(f'{i}: {filenamestr} {status}')
 
-    @TimeTrackingWrapper
     def get_distances(self, lat, lon):
         dist = haversine_dist(lat1=self._data.XLAT, lon1=self._data.XLONG, lat2=lat, lon2=lon)
         return dist
 
-    @TimeTrackingWrapper
     def get_bearing(self, lat, lon, points_last=True):
         bearing = bearing_angle(lat1=lat, lon1=lon, lat2=self._data.XLAT, lon2=self._data.XLONG)
         if points_last:
@@ -170,7 +165,6 @@ class BaseWrfChemDataLoader:
         else:
             return bearing
 
-    @TimeTrackingWrapper
     def compute_nearest_icoordinates(self, lat, lon, dim=None):
         dist = self.get_distances(lat=lat, lon=lon)
 
@@ -179,7 +173,6 @@ class BaseWrfChemDataLoader:
         else:
             return dist.argmin(dim)
 
-    @TimeTrackingWrapper
     def _set_dims_as_coords(self):
         if self._data is None:
             raise IOError(f'{self.__class__.__name__} can not set dims as coords. Use must use `open_data()` before.')
@@ -189,7 +182,6 @@ class BaseWrfChemDataLoader:
         self._data = data
         logging.info('set dimensions as coordinates')
 
-    @TimeTrackingWrapper
     def apply_staged_transormation(self, mapping_of_stag2unstag=None):
         if mapping_of_stag2unstag is None:
             mapping_of_stag2unstag = {'U': 'U10', 'V': 'V10', 'U10': 'U10', 'V10': 'V10'}
@@ -230,7 +222,6 @@ class BaseWrfChemDataLoader:
             self._data[u_ll_name] = ull
             self._data[v_ll_name] = vll
 
-    @TimeTrackingWrapper
     def set_interpolated_field(self, staged_field: xr.DataArray, target_field: xr.DataArray,
                                dropped_staged_attrs: List[str] =None, **kwargs):
         stagger_attr_name = kwargs.pop('stagger_attr_name', 'stagger')
@@ -291,7 +282,6 @@ class SingleGridColumnWrfChemDataLoader(BaseWrfChemDataLoader):
         # self._set_geoinfos()
         logging.debug("SingleGridColumnWrfChemDataLoader Initialised")
 
-    @TimeTrackingWrapper
     def __enter__(self):
         self.open_data()
 
@@ -311,7 +301,6 @@ class SingleGridColumnWrfChemDataLoader(BaseWrfChemDataLoader):
         self.data.close()
         gc.collect()
 
-    @TimeTrackingWrapper
     def _set_geoinfos(self):
         # identify nearest coords
         self._set_nearest_icoords(dim=[self.logical_x_coord_name, self.logical_y_coord_name])
@@ -346,7 +335,6 @@ class SingleGridColumnWrfChemDataLoader(BaseWrfChemDataLoader):
     def geo_infos(self):
         return self._geo_infos
 
-    @TimeTrackingWrapper
     def _apply_external_coordinates(self):
         ds_coords = xr.open_dataset(self.external_coords_file, chunks={'south_north': 36, 'west_east': 40})
         data = self._data
@@ -356,7 +344,6 @@ class SingleGridColumnWrfChemDataLoader(BaseWrfChemDataLoader):
         ds_coords.close()
         logging.debug('setup external coords')
 
-    @TimeTrackingWrapper
     def _set_coords(self, coords):
         __set_coords = dict(lat=None, lon=None)
         if len(coords) != 2:
@@ -372,14 +359,12 @@ class SingleGridColumnWrfChemDataLoader(BaseWrfChemDataLoader):
         else:
             raise TypeError(f"`coords' must be a tuple of floats or a dict, but is of type: {type(coords)}")
 
-    @TimeTrackingWrapper
     def get_coordinates(self, as_arrays=False) -> Union[Tuple[np.ndarray, np.ndarray], dict]:
         if as_arrays:
             return np.array(self.__coords['lat']), np.array(self.__coords['lon'])
         else:
             return self.__coords
 
-    @TimeTrackingWrapper
     def _set_nearest_icoords(self, dim=None):
         lat, lon = self.get_coordinates(as_arrays=True)
         self._nearest_icoords = dask.compute(self.compute_nearest_icoordinates(lat, lon, dim))[0]
@@ -643,7 +628,6 @@ class DataHandlerSectorGrid(DataHandlerSingleGridColumn):
         self.wind_dir_name = None
         super().__init__(*args, **kwargs)
 
-    @TimeTrackingWrapper
     def extract_data_from_loader(self, loader):
         wind_dir_name = self._get_wind_dir_var_name(loader)
         full_data = loader.data.isel(loader.get_nearest_icoords()).squeeze()
@@ -706,12 +690,27 @@ class DataHandlerSectorGrid(DataHandlerSingleGridColumn):
                 # sector_history = sector_history.assign_coords({self.target_dim: sector_history_var_names})
 
                 grid_data = self.preselect_and_transform_neighbouring_data_based_on_radius(loader)
-
+                # grid_data = grid_data.expand_dims(self.iter_dim, -1).assign_coords(
+                #     {self.iter_dim: self.history.coords[self.iter_dim].values})
+                # sec_data_history_var_names = [f"{var}_sect" for var in self.history.coords[self.target_dim].values]
+                logging.info("preselect_and_transform_neighbouring_data_based_on_radius(loader)")
                 for sect in existing_sectors:
                     # select data in wind sector
                     sec_data = self.get_section_data_from_circle(grid_data, loader, sect)
                     sec_data = self.apply_aggregation_method_on_sector_data(sec_data, loader)
-
+                    sec_data_history = self._make_and_return_history_window(dim_name_of_shift=self.time_dim,
+                                                                            window=self.window_history_size,
+                                                                            data=sec_data.to_array(self.target_dim)
+                                                                            )
+                    sec_data_history = sec_data_history.broadcast_like(self.history)
+                    sec_data_history = sec_data_history.transpose(*self.history.dims)
+                    sector_history = xr.where(sector_allocation.squeeze() == sect,
+                                              sec_data_history.sel({self.time_dim: sector_history[self.time_dim]}),
+                                              sector_history * 1.)
+
+                sector_history = sector_history.assign_coords({self.target_dim: sector_history_var_names})
+                sector_history = sector_history.compute()
+            combined_history = xr.concat([self.history, sector_history], dim=self.target_dim)
 
                     # loader.data.T2.where(loader.geo_infos.dist.sel({'points': 0}).drop('points') <= self.radius).where(
                     #     self.windsector.is_in_sector(sect, loader.geo_infos.bearing))
@@ -722,7 +721,9 @@ class DataHandlerSectorGrid(DataHandlerSingleGridColumn):
                     #     self.windsector.is_in_sector(sect,
                     #                                  loader.geo_infos.bearing.drop('points').squeeze()))
 
-        return self.history
+            return combined_history
+        else:
+            return self.history
 
     def get_section_data_from_circle(self, grid_data, loader, sect):
         sec_data = grid_data.where(
@@ -761,7 +762,6 @@ class DataHandlerSectorGrid(DataHandlerSingleGridColumn):
         wind_dir_of_intrest = self.history.sel({self.target_dim: self.wind_dir_name, self.window_dim: 0})
         return wind_dir_of_intrest
 
-    @TimeTrackingWrapper
     def get_applied_transdormation_on_wind_sector_edges(self):
         ws_edges = self._get_left_and_right_wind_sector_edges(return_as='xr.da', dim=self.wind_sector_edge_dim_name)
         ws_edges = self.apply_transformation_on_data(ws_edges)