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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New parallel algorithms for flow routing on DEMs achieve 4.0 seconds runtime on a 1.88-billion-point model using 12,288 processes, extending prior sequential and moderately parallel methods.
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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.
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Massively parallel flow routing and drainage area determination
New parallel algorithms for flow routing on DEMs achieve 4.0 seconds runtime on a 1.88-billion-point model using 12,288 processes, extending prior sequential and moderately parallel methods.