Migration matrix Category Category 1: common Category 2: satellite Category 3: aviation Category 4: maritime Category 5: miscellaneous Category 6: obsolete Lists of TAC Schedule SYNOP SYNOP MOBIL PILOT PILOT MOBIL TEMP TEMP MOBIL TEMP DROP CLIMAT SAREP SATEM SARAD SATOB METAR SPECI TAF AMDAR SHIP CLIMAT SHIP PILOT SHIP TEMP SHIP BUOY TRACKOB BATHY TESAC WAVEOB RADOB IAC IAC FLEET GRID RADOF ICEAN GRAF NACLI SFAZI SFLOG SFAZU ROCOB CODAR ….. CLIMAT TEMP Start of experimental exchange Nov. 2002 Nov. 2007 Nov. 2002Nov. 2005Nov. 2004 Start of operational Exchange Nov. 2005 Nov. 2013? Nov. 2003 Nov. 2007Nov. 2006 Migration complete Nov. 2010Nov. 2006 Nov. 2016? Nov. 2006Nov. 2012 Nov. 2008 TAC stopped Nov. 2014
Start of experimental exchange Data will be made available in BUFR (CREX), but not operationally. Start of operational exchange Data will be made available in BUFR (CREX) whereby some (but not all) Members rely on them operationally. Still the current alphanumeric codes will be distributed (parallel distribution). Migration complete At this date the BUFR (CREX) exchange becomes the standard WMO practice. Parallel distribution of TAC and TDCF may continue and will be discontinued step by step whenever possible with respective advance notification. TAC stopped (parallel distribution of TAC and BUFR stopped ) At this date parallel TAC and BUFR distribution is terminated. For archiving purposes and at places where BUFR (CREX) exchange still causes problems the alphanumeric codes may be used only for the exchange of data between two NMHSs.