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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.

Additional Publication Details

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
Edition:
Version 1.0
Year Published:
2004
Language:
ENGLISH
Description:
52 p.