1002-apodization
'Apodization' refers to the process of applying a mathematical function after the Fast Fourier Transform (FFT) to remove side peaks in the spectrum, which can distort signals and hinder their interpretation in Earth and Planetary Sciences.
BRAINSTORM
try different lmax to see if the mode-mixing effect ameliorated.
try different mask apodization.
simulation by fg first.
see if lmax limited adding will cause some problem.
BRAINSTORM testing
if different lmax are applied the results will not change much expect for the last bin.
different mask apodization won't change the results a lot.
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