table_header:
  't_start_Buf':
  t_start_Buf:
    desc: Date and time of the measurement
    unit: YYYY-MM-DD HH:MM:SS
    rename_as: date_time


  df1['t_start_Buf']  = pd.to_datetime(df1['t_start_Buf'].apply(lambda a: a.decode()), format='%d.%m.%Y %H:%M:%S.%f', errors='coerce') 
  df2['t_base']  = pd.to_datetime(df2['t_base'].apply(lambda a: a.decode()), format='%d.%m.%Y %H:%M:%S', errors='coerce')