reset attributes to ull and vll after rotation

mlair/helpers/geofunctions.py

@@ -8,6 +8,7 @@ import xarray as xr
 
 from mlair.helpers.helpers import convert2xrda
 from typing import Union, Tuple
+import logging
 
 xr_int_float = Union[xr.DataArray, xr.Dataset, np.ndarray, int, float]
 tuple_of_2xr_int_float = Tuple[xr_int_float, xr_int_float]
@@ -416,7 +417,12 @@ class VectorRotateLambertConformal2latlon(VectorRotate):
         :return:
         :rtype:
         """
-        return vgrd * da.sin(self._alpha) + ugrd * da.cos(self._alpha)
+        ull = vgrd * da.sin(self._alpha) + ugrd * da.cos(self._alpha)
+        try:
+            ull.attrs = ugrd.attrs
+        except Exception as e:
+            logging.debug(f"Can not set attrs for ull due to: {e}")
+        return ull
 
     def vgrd2vll(self, ugrd, vgrd):
         """
@@ -429,12 +435,12 @@ class VectorRotateLambertConformal2latlon(VectorRotate):
         :return:
         :rtype:
         """
-        return vgrd * da.cos(self._alpha) - ugrd * da.sin(self._alpha)
-
-
-
-
-
+        vll = vgrd * da.cos(self._alpha) - ugrd * da.sin(self._alpha)
+        try:
+            vll.attrs = vgrd.attrs
+        except Exception as e:
+            logging.debug(f"Can not set attrs for vll due to: {e}")
+        return vll
 
 
 if __name__ == '__main__':