Fixed bug with time unit in basetime (#272)

src/pytesmo/validation_framework/adapters.py

@@ -604,9 +604,9 @@ def __init__(self,
 
         self.drop_original = drop_original
 
-    def convert_generic(self, time_arr: np.array) -> np.array:
+    def convert_generic(self, time_arr: np.array, units: str = 'D') -> np.array:
         """Convert the generic time field to np.datetime[64] dtype"""
-        time_delta = time_arr.astype(int).astype('timedelta64[D]')
+        time_delta = time_arr.astype(int).astype(f'timedelta64[{units}]')
         time_date = np.full(time_delta.shape,
                             self.base_time_reference) + time_delta
 
@@ -650,7 +650,7 @@ def _adapt(self, data: DataFrame) -> DataFrame:
             return original
 
         if self.base_time_reference is not None:
-            base_time_values = self.convert_generic(base_time_values)
+            base_time_values = self.convert_generic(base_time_values, self.base_time_units)
 
         # If no offset is specified
         if self.time_offset_fields is None:
@@ -671,4 +671,7 @@ def _adapt(self, data: DataFrame) -> DataFrame:
             if self.base_time_field in data.columns:
                 data.drop(columns=[self.base_time_field], inplace=True)
 
+        # Remove NaNs from index, if present
+        data = data.loc[data.index.dropna()]
+
         return data