markerdescription
B

BUFR only (BUFR but no TAC in the last 7 days )

green: station in ECMWF/WMO catalogue

orange: station not in ECMWF/WMO catalogue

TTAC only TAC but no BUFR in the last 7 days )
DDual ( Both BUFR and TAC in the last 7 days )
SSilent (no report in the last 7 days )