The inverse of winnowing: a FORTRAN subroutine and discussion of unwinnowing discrete data
Open-File Report
2003-229
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Abstract
This report describes an unwinnowing algorithm that utilizes a discrete Fourier transform, and a resulting Fortran subroutine that winnows or unwinnows a 1-dimensional stream of discrete data; the source code is included. The unwinnowing algorithm effectively increases (by integral factors) the number of available data points while maintaining the original frequency spectrum of a data stream. This has utility when an increased data density is required together with an availability of higher order derivatives that honor the original data.
Suggested Citation
Bracken, R.E., 2004, The inverse of winnowing: a FORTRAN subroutine and discussion of unwinnowing discrete data (Version 1.0): U.S. Geological Survey Open-File Report 2003-229, 52 p., https://doi.org/10.3133/ofr03229.
ISSN: 2331-1258 (online)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | The inverse of winnowing: a FORTRAN subroutine and discussion of unwinnowing discrete data |
| Series title | Open-File Report |
| Series number | 2003-229 |
| DOI | 10.3133/ofr03229 |
| Edition | Version 1.0 |
| Year Published | 2004 |
| Language | ENGLISH |
| Description | 52 p. |