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