0 0 RESERVED
1 1 PRESSURE ONLY RADIOSONDE
2 2 PRESSURE ONLY RADIOSONDE PLUS TRANSPONDER
3 3 PRESSURE ONLY RADIOSONDE PLUS RADAR REFLECTOR
4 4 NO-PRESSURE RADIOSONDE PLUS TRANSPONDER
5 5 NO-PRESSURE RADIOSONDE PLUS RADAR REFLECTOR
15 15 MISSING VALUE
