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Record Details

Record 78 of 10378
Sigma Filter
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Author and Affiliation:
Balgovind, R. C.(Sigma Data Services Corp., Greenbelt, MD, United States)
Abstract: The GLA Fourth-Order model is needed to smooth the topography. This is to remove the Gibbs phenomenon. The Gibbs phenomenon occurs whenever we truncate a Fourier Series. The Sigma factors were introduced to reduce the Gibbs phenomenon. It is found that the smooth Fourier series is nothing but the original Fourier series with its coefficients multiplied by corresponding sigma factors. This operator can be applied many times to obtain high order sigma filtered field and is easily applicable using FFT. It is found that this filter is beneficial in deriving the topography.
Publication Date: Jan 01, 1985
Document ID:
19850021138
(Acquired Nov 13, 1995)
Accession Number: 85N29450
Subject Category: METEOROLOGY AND CLIMATOLOGY
Document Type: Technical Report
Publication Information: NASA. Goddard Space Flight Center Res. Rev., 1983; p 50
Publisher Information: United States
Financial Sponsor: NASA; United States
Organization Source: Sigma Data Services Corp.; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: APPROXIMATION; FILTERS; FOURIER SERIES; TOPOGRAPHY; TRUNCATION ERRORS; MATHEMATICAL MODELS; OPERATORS (MATHEMATICS); SERIES (MATHEMATICS)
Imprint And Other Notes: In NASA. Goddard Space Flight Center Res. Rev., 1983 p 50 (SEE N85-29433 18-47)
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