code: def is44(msg):
      
      if allzeros(msg):
          return False
  
      d = hex2bin(data(msg))
  
      # status bit 5, 35, 47, 50
      if wrongstatus(d, 5, 6, 23):
          return False
  
      if wrongstatus(d, 35, 36, 46):
          return False
  
      if wrongstatus(d, 47, 48, 49):
          return False
  
      if wrongstatus(d, 50, 51, 56):
          return False
  
      # Bits 1-4 indicate source, values > 4 reserved and should not occur
      if bin2int(d[0:4]) > 4:
          return False
  
      vw = wind44(msg)
      if vw is not None and vw[0] > 250:
          return False
  
      temp, temp2 = temp44(msg)
      if min(temp, temp2) > 60 or max(temp, temp2) < -80:
          return False
  
      return True
docs: Check if a message is likely to be BDS code 4,4.
  
      Meteorological routine air report
  
      Args:
          msg (String): 28 bytes hexadecimal message string
  
      Returns:
          bool: True or False