A few small functions:

gistfile1.txt

def slice_dataset_space(ds_array, ds_to_slice):
        '''
        slices second Dataset to fit first Dataset
        '''
        swe_mask_align, array_align = xray.align(ds_array, ds_to_slice, join='inner', copy=False)
        return(array_align)

def slice_dataset_time(ds, start_time, end_time):
        '''
        slices dataset with start and end times 
        '''
        ds_timeslice = ds.sel(time=slice(start_time, end_time)) 
        return(ds_timeslice)