SEACOOS CDL v2.0 December 9, 2004 16 :platform_code Text. A short distinctive name or code (with no spaces) that identifies the site or platform that the sensor or sensor package is mounted.  The code will be issued by the institution responsible for that platform data. Examples: “R2”, “KJAX”, “KS011”, “ELWX5”, “PAS”, “C10”, “41009”, “FBIS1” KJAX = Jacksonville Florida Airport KOBX = Outerbanks North Carolina Airport KS011 = a VOS SeaKeeper Ship ELWX5 = Explorer of the Seas R2 = one of the SABSOON towers SPAG1 = R2 but is NDBC identifier PAS = USF/COMPS buoy C10 = another USF buoy 41009 = NDBC buoy FBIS1 = NDBC CMAN station :package_code Text. A short distinctive name (with no spaces) for data from sensor or the package of sensors contained within the file. Examples: “met”, “metar”, “ASIMET”, “NGWLMS”, “SK”, “weatherpak”. The following global attributes are required for SEACOOS data format version tracking and verification. :format Text. The netCDF data format for real- time data posted for the SEACOOS data scout. This attribute may be deprecated by the more widely used and accepted “:Conventions” attribute. Example: “SEACOOS RT” or “seacoos_rt” :seacoos_rt_version Text. The version number of the netCDF data format for real- time data posted for the SEACOOS data scout.  This attribute may be deprecated by the more widely used “ :Conventions ” attribute.  Example: “2.0” 9.2 Recommended Global Attributes The following global attributes are recommended global attributes often used by the netCDF user community.  These are more fully documented in the netCDF User’s Guide and CF -v1.0.   :_FillValue Scalar value of the same type as the variable. This value denotes valid data that is not present or outside the valid range for the variable.  It is also used to pre- fill a variable and is treated specially by the netCDF library function if “nofill” is not specified . This value will be returned by the netCDF library if the data are never written. Note the underscore character and capitalization.  If the _FillValue attribute is presented with the global attributes then each variable inherits this value unless specified with a variable attribute. Example: -9999 :missing_value