Dear All:
we requested the cloud mask and related quantities last year, and I had the impression these standard_names were accepted. cloud_binary_mask: X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = cloud present, 0 = cloud absent (clear). Note that if no threshold is supplied, the binary mask is 1 if there is any non-zero amount of cloud aerosol_binary_mask: X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = aerosols present, 0 = aerosolsabsent. Note that if no threshold is supplied, the binary mask is 1 if there is any non-zero amount of aerosol. smoke_binary_mask: X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = smoke present, 0 = smoke absent. Note that if no threshold is supplied, the binary mask is 1 if there is any non-zero amount of smoke. dust_binary_mask: X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = dust present, 0 = dust absent. Note that if no threshold is supplied, the binary mask is 1 if there is any non-zero amount of dust. I asked Alison in December about why these had not made it into the CF standard name table, and she said it was on her queue.. The specific thread starts at: http://mailman.cgd.ucar.edu/pipermail/cf-metadata/2013/056483.html very respectfully, randy On Feb 18, 2014, at 12:53 PM, Jonathan Gregory <[email protected]> wrote: > Dear Kris > > cloud_binary_mask would be exactly the right standard name, I think, as Jim > suggests. > > Cheers > > Jonathan > >> 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 > _______________________________________________ > CF-metadata mailing list > [email protected] > http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata ____________________________________ Randy C. Horne ([email protected]) Principal Engineer, Excalibur Laboratories Inc. voice & fax: (321) 952.5100 url: http://www.excaliburlabs.com _______________________________________________ CF-metadata mailing list [email protected] http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata
