1) Weather facsimile 
WEFAX is the automatic picture transmission (APT) scheme developed for direct broadcast from the early and subsequent US polar orbiting weather satellites. WEFAX is an analogue transmission system (as distinct from more modern digital systems) that is now used widely by all operators of weather satellite systems. WEFAX signals from Meteosat consist…
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Weather FAX
acronym: weather facsimile (via geosynchronous weather satellite)