GUAN Station Summaries by Region Reports: (2011) (2010) (2009) (2008) (2007) (2006) (2005) (2003) (2002) (please note that no update was performed in 2004)

Change Log: GUAN Station List (2011)

Frequency of Reception Data for GUAN Stations: (ECMWF) (2011)

Upper Air Height Inventory (Regions 1-7) (updated monthly) (NOAA/NWS/NCEP) (GUAN Stations) (Non-GUAN Stations)