Dears, 
I have a question related to calculation of the Power Spectral Density as 
reported at page 69 of the manual. I cannot easily understand what exactely is 
that "h" that originates the nm^3 unit instead of the nm^4 as reported 
elsewhere for the PSD. Is that h the maximum height in the processed image? Or 
is it maybe the image resolution in nm? I cannot find any h definition in the 
previous paragraphs of the manual. 
I only need to transform the nm^3 as Gwyddyon calculates into nm^4 for my 
purposes. 

Thank you in advance for your reply 

Alessandro Gambardella 
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