code: def read_wwln(file):
      
      tmp = pd.read_csv(file, parse_dates=True, header=None,
                        names=['date', 'time', 'lat', 'lon', 'err', '#sta'])
      # Generate a list of datetime objects with time to miliseconds
      list_dts = []
      for dvals, tvals, in zip(tmp['date'], tmp['time']):
          list_dts.append(gen_datetime(dvals, tvals))
      dtdf = pd.DataFrame(list_dts, columns=['datetime'])
      result = pd.concat([dtdf, tmp], axis=1)
      result = result.drop(['date', 'time'], axis=1)
      return result
docs: Read WWLN file