{HEAD ~ A Fourier transform} is performed on {TAIL ~ the windowed spectral image data} along the λ dimension, at locations along the x dimension and y dimension, to generate Fourier coefficients associated with each of the locations 
{ HEAD ~ A Fourier transform } is performed on { TAIL ~ the windowed spectral image data } along the λ dimension , at locations along the x dimension and y dimension , to generate Fourier coefficients associated with each of the locations
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