{"layout":"flat -- one group per station, four product sub-groups (fluxes, meteo, meteosens, auxdata), each a wide half-hourly table on dim (time)","open":"open a station/product sub-group, e.g. group=\"BE-Bra/fluxes\"","source":"ETC NRT growing series, discovered via SPARQL (etcNrtFluxes/Meteo/Meteosens/AuxData)","time_coord":"time","variables":"every CSV column is a <f4> array; -9999 is NaN; flag/QC and count columns are numeric-coded"}