Re: [CF-metadata] GOES-R generated binary mask products under proposal

[Jim Biard]

There may be a complex algorithm underlying the binary state to be represented by these standard names, but there clearly is a threshold for each binary state.  There is some level of each constituent for which the corresponding algorithm will produce zeros.  It seems to me that it would better to state even a rough estimate of the threshold in each case than to leave it unstated. Jim Biard Research Scholar Cooperative Institute for Climate and Satellites Remote Sensing and Applications Division National Climatic Data Center 151 Patton Ave, Asheville, NC 28801-5001 jim.bi...@noaa.gov 828-271-4900 Follow us on Facebook! On May 15, 2013, at 3:34 PM, Charles Paxson <cpax...@aer.com> wrote: Dear CF Metadata Users Group, Through observations and analysis, GOES-R weather products produce binary masks for: aerosols, smoke, dust and clouds.   No coordinate value is warranted (i.e. CF Metadata standard surface_snow_binary_mask) for any of these four proposed quantities, since a complex set of tests for each case, such as using brightness temperatures, are used to derive signatures of the four atmospheric constituents.  The proposed masks are analogous and defined in a similar way as the CF Metadata standard names: land_binary_mask and sunlit_binary_mask.      aerosol_binary_mask: X_binary_mask has 1 where condition X is met, 0 elsewhere. 1 = aerosols present, 0 = aerosols absent smoke_binary_mask: X_binary_mask has 1 where condition X is met, 0 elsewhere.  1 = smoke present, 0 = smoke absent dust_binary_mask: X_binary_mask has 1 where condition X is met, 0 elsewhere.     1 = dust present, 0 = dust absent cloud_binary_mask: X_binary_mask has 1 where condition X is met, 0 elsewhere.    1 = cloud present, 0 = cloud absent (clear) Please accept these four mask names for inclusion into the CF Metadata standard. Sincerely, Charles Paxson _______________________________________________ CF-metadata mailing list CF-metadata@cgd.ucar.edu http://mailman.cgd.ucar.edu/mailman/listinfo/cf-metadata

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