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Hi Ellyn, The "Fields" column is showing the values of profile variables (i.e. Hdg_1215, Ptch_1216, Rec, etc). Right-clicking the table row and selecting "Show Fields" should clarify things. I agree that it's a bit confusing; in the future, I'd like to create a separate column for each variable, instead of just cramming them all in "Fields". As for the NaNs, when a dataset is read by NetCDF-Java, by default it assigns NaNs to values it determines are missing, for efficiency. It thinks that the "AGC_1202" values are missing because you have: :valid_range = 255.0, 255.0; // double You'll want to widen that range. Cheers, Christian Ticket Details =================== Ticket ID: OLE-532670 Department: Support netCDF Java Priority: Urgent Status: Closed