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Hi Jonathan, I've done a little more work on this issue, and I'm afraid there is no easy solution. After stepping through our code that opens radar files, I see that we are either reading the code incorrectly out of this file, which is probably given the product code value of -252, or there is something else we don't know about this product. I tried adding 256 to the value (i.e., correcting for a signed bit), but there is no product code 4 that I could find, either. I've moved your support ticket over to JIRA, our bug tracking system: https://bugtracking.unidata.ucar.edu/browse/TDS-506 Many thanks for bringing this issue to our attention! -Lansing Ticket Details =================== Ticket ID: TYF-271558 Department: Support netCDF Java Priority: Normal Status: Open