Salinity is in practical salinity units; Wind speed is
in knots; barometric pressure is in hectoPascals;
wind direction is in degrees of the compass;
temperature is in Celsius; photosynthetically active
radiation is in mmol quanta m-2 s-1 ; Ultraviolet
Radiation is in units of mW m-2nm-1
Relative humidity is in units of g m-3; Hail/Rain
amount is in mm hr-1, hail/rain duration and intensity is in seconds
-9 in the data set indicates that the parameter is unavailable
Definition of Data Fields
https://www.ncei.noaa.gov/data/oceans/coris/data/NOAA/oar/ICONstations/StCroix/ICON_SRVI_2010_Data_Term_Definition.pdf