ENUFFT computes local Fourier coefficients from irregular orography samples on unstructured grids via NUFFT and elastic mode selection, producing more compact spectra and closer Parseval compliance than prior methods in monochromatic, Alpine, and mountain-wave tests.
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Elastic Non-Uniform FFT (ENUFFT) spectral reconstruction of irregularly sampled orography on unstructured grids
ENUFFT computes local Fourier coefficients from irregular orography samples on unstructured grids via NUFFT and elastic mode selection, producing more compact spectra and closer Parseval compliance than prior methods in monochromatic, Alpine, and mountain-wave tests.