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obs/country/station-type/observationmessage-type/
For observations, the topic hierarchy and the associated metadata shall be consistent with OSCAR metadata.
Country where the observing station is located. This is sometimes a problem with the sea stations.
station-type is about the location of the station (land, air, sea) and whether it is fixed or mobile: OSCAR surface observation
message-type is about the type of observation (e.g. surface, upper-air)message sent out by the observing station
Filename: WSI_[WSI value]_[timestamp].[data format]
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