This decoder decodes raw observations from reconnaisance aircraft investigating tropical cyclones and winter storms. Please enter the observation(s) you wish to decode in the box below. For a list of products this decoder can decode and for additional options please view the information after the box below.
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This decoder decodes high-density (HDOB), vortex, dropsonde, reconnaissance code (RECCO) and airborne expendable bathythermograph (AXBT) observations from Air Force and NOAA aircraft performing reconnaissance in both tropical and non tropical systems. It also decodes dropsondes from NASA's GlobalHawk UAV if they are in the same WMO format as Air Force and NOAA sondes. You can access most of the raw data through the National Hurricane Center's Aircraft Reconnaissance page and also at the links at the bottom of this page. This decoder can decode multiple messages of any combination of the above products. This decoder also decodes the no longer used SXXX50, URNT40 and URNT50 formats but does not decode supplementary vortex messages (URNT14). It can also decode another NOAA AXBT format that may or may not be still in use.
Degrees, Minutes, Seconds:
Main Air Force Products (KNHC)
URNT15 - High Density (HDOB) Message
URNT12 - Vortex Message
UZNT13 - Dropsonde Report
URNT11 - Tropical RECCO Observation
URNT10 - Non-Tropical RECCO Observation
WMO FM 63-XI Ext. BATHY (JJVV) - AXBT Ob.
Main NOAA Products (KWBC)
SOFX01 - AXBT Observation
Air Force Backup Products (KBIX)
URPN15 - High Density (HDOB) Message
URPN12 - Vortex Message
UZPN13 - Dropsonde Report
URPN11 - Tropical RECCO Observation
URPN10 - Non-Tropical RECCO Observation