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NOTICE: This version of the NSF Unidata web site (archive.unidata.ucar.edu) is no longer being updated.
Current content can be found at unidata.ucar.edu.
To learn about what's going on, see About the Archive Site.
David, This information (courtesy of Michael James, our Gempak Guru) might be useful: " I think the nex2gini table calibration range is the information he is looking for. https://github.com/Unidata/gempak/blob/master/gempak/tables/unidata/nex2gini.tbl For example, N1P 30 4 inches,0,9,-9999,-9999;10,100,0,0.5;101,200,0.5,5;201,255,5,12 TICZ99 CHIZ 30 = unique product ID 4 = number of calibration ranges inches = unit ; = delimiter for the 4 calibration ranges, containing min/mac for pixel value followed by min/max for the unit. I think him finding the max value of 153 is the greatest pixel value available in that particular image. Most products use 256 levels, but N0R max possible value is 105. " Ryan > Ryan, > Thanks for the Thredds link. I have successfully downloaded and decoded some > of the GINI files; subsequently obtaining the PNG file and header > information. However, I seem to be missing one bit of (important) > information. I can't seem to find the index values within these PNGs. For > example, in one of the DVL files, the index seems to range roughly from > 0-253. In the N0R (reflectivity), I see index values in the PNG image go > from 0-80. In the one hour precip (N1P), which I assume is in either mm or > inches, the max is 153. > > When performing an octal dump, I can see information pertaining to 'dBz' or > 'inches' (for n0r and n1p, respectively) around the 68th bit character, but I > can't make sense of where the magnitude values are found. Do you have a > publication or a method that will help me extract the corresponding index > values to their associated dBz, inches, etc? I have referenced the > following doc, but it describes nothing past octet 61.... > http://www.nws.noaa.gov/noaaport/document/ICD%20CH5-2005-1.pdf > Ticket Details =================== Ticket ID: LOE-612985 Department: Support netCDF Java Priority: Normal Status: Closed