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3. SYNOP Data via Short-wave (RTTY)
Several Meteo stations transmit 24 hour daily Teletype (RTTY) Synopsis Data on short wave from weather stations around the globe.
These (5 number) data streams are called as example SYNOP AAXX or SHIP BBXX and are WMO
standard.
To decode the SYNOP data you need a SSB Shortwave or Ham receiver and also an RTTY
decoder which decode the numbers into clear text or to convert graphical maps.
Please see the links in the previous page for software than
can decode this
form of digital communication.