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About 73% of stations report in BUFR, about 28% report native BUFR with roughly 45% reporting reformatted TEMP (see "structure" page and plots below). The proportion of native reports is gradually growing and the proportion of stations making high resolution reports has now crept up to ~20%, including some stations from each WMO region. Between March and July 2017 Korea stopped reporting in high-resolution but HiRes availability improved from South Africa, France and Turkey (although there are gaps in the HiRes reporting from South Africa and Turkey). The USA has started sending HiRes reports from some stations but ECMWF needs to make a decoder change before we process them. Reports may be incomplete (eg data above 100 hPa missing). Reports from the ASAP ships are now only available in BUFR format. A smattering of other stations (green dots on the map, these include 17607, Cyprus; 33008; Belarus; 47115, Korea and two Mexican stations) are BUFR only, one or two of these are new to the GTS and never reported in TEMP code.
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The plot below distinguishes native BUFR (stations reporting valid radiosonde drift positions): high/low resolution (dark/light blue, using 300 level threshold) from reformatted TEMP (orange). High resolution reports come mainly from European and Australian stations.
