Jasmine, Yes, that is what you should do with the scale and offset. The data returned by opendap for any of the radar data variables (like reflectivity) should be single byte *unsigned* values in the range 0 to 255. Applying the scale and offset will convert them to values in the range -33 to 94.5 by the formula: scaled_value = byte_value * 0.5 + -33. If the values look weird, it's possible the opendap client you're using isn't handling the unsigned values properly and is instead giving you byte values in the range -128 to 127; in this case the negative values won't scale properly using the above formula. Ryan > Good afternoon, > Thank you for your previous answer. > > I do have another question please. > Indeed, in the reflectivity variable, it is said > - scale factor = 0.5 > - add offset = -33.0 > Are we supposed to divide each reflectivity value per 2 and add an offset > of -33dbZ per value ? > > Because, when we take a look at the reflectivity value with a scale of the > reflectivity meaning it does match so well. Ticket Details =================== Ticket ID: XRG-961762 Department: Support THREDDS Priority: Normal Status: Closed
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