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> ad 2) we simply want the obs-data (GTS-format ?), sorted by country (1st > folder), then date (YYYYMMDD) (2nd folder), filename=stationcode-HH > > Best regards > > Mark > > P.S. is there any description of the contents (structure, ...) available for > the unidata data-products ? Mark, The WMO header that the data bulletins are broadcast with follows the format: TTAAii CCCC YYGGgg BBB .... See: http://www.weather.gov/tg/headef.html for a decription of the WMO defined identifiers. A decription of the data being broadcast by the US National Weather service on NOAAPORT, is provided at: http://weather.noaa.gov/tg/wmohdg.shtml The WMO defines the CCCC group as the originating center, so you could store your data by center and YYYYMMDD such as: IDS|DDPLUS <tab> ^[A-Z][A-Z][A-Z][A-Z][0-9][0-9] ([A-Z][A-Z][A-Z][A-Z]) ([0-3][0-9])[0-2][0-9][0-6][0-9] <tab> FILE <tab> \1/(\2:yyyy)(\2:mm)\2 in the above, the \1 regex refers to the 4 character sequence bounded by the first set of parentheses "(A-Z][A-Z][A-Z][A-Z])". The \2 regex refers to the second set of parentheses (eg the day of month group in the WMO heading. The LDM uses the current system clock and the day of month to guess at the YYYY and MM groups using (\2:yyyy) and (\2:mm) respectively, so the (\2:yyyy)(\2:mm)\2 sequence will create the YYYYMMDD date. Steve Chiswell Unidata User Support Ticket Details =================== Ticket ID: KOQ-745915 Department: Support IDD Priority: Critical Status: Closed