Kris, If you look at the definition of cloud_area_fraction, it doesn’t imply any averaging or ratio. It is the fraction of the cell that is cloudy. It could be fine for your purposes, but if you would like to make it more clear that it is binary, I’d suggest we create a standard name of cloud_binary_mask. This would be like land_binary_mask, with a definition of
X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = cloudy, 0 = clear sky. This also avoids adding satellite specificity to a general concept that can be used for other purposes. Grace and peace, Jim Visit us on Facebook Jim Biard Research Scholar Cooperative Institute for Climate and Satellites NC North Carolina State University NOAA's National Climatic Data Center 151 Patton Ave, Asheville, NC 28801 e: jbi...@cicsnc.org o: +1 828 271 4900 On Feb 18, 2014, at 12:42 PM, Bedka, Kristopher M. (LARC-E302)[SCIENCE SYSTEMS AND APPLICATIONS, INC] <kristopher.m.be...@nasa.gov> wrote: > We are detecting cloudy and clear sky pixels using a combination passive > infrared and visible satellite imagery. The community typically calls this > product a "cloud mask", i.e. byte value 0=clear sky pixel, 1=cloudy pixel. I > am reviewing the CF Standard Name table and I see no name that would > correspond to this type of product. I see the name "cloud_area_fraction", > but the concept of "fraction" would imply that one considers several pixels > in a region and computes the ratio of cloudy pixels relative to the total > number of pixels in the region. This is not being done with our processing. > I'd recommend something like "cloudy_satellite_pixel_detection", but am open > to other suggestions > > Kris > > > ========================================================= > Kristopher Bedka > Senior Research Scientist > Science Systems & Applications, Inc. @ NASA Langley Research Center > Climate Science Branch > 1 Enterprise Parkway, Suite 200 > Hampton, VA 23666 > Primary Office Phone: (757) 864-5798 > Secondary Office Phone: (757) 951-1920 > Fax: (757) 951-1902 > kristopher.m.be...@nasa.gov > ========================================================= > > _______________________________________________ > CF-metadata mailing list > CF-metadata@cgd.ucar.edu > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
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