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