Accession Number : AD0721185

Title :   Compensation of Interpolation by Linear Filter.

Descriptive Note : Physical sciences research papers,

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : Shapiro,Ralph

Report Date : 28 JAN 1971

Pagination or Media Count : 24

Abstract : A method for counteracting the damping effects of interpolation makes use of simple symmetric linear filters. Specifically for use in numerical integrations involving multiple mappings of a grid network on a sphere, it has been designed to take advantage of the relative simplicity of map representations in numerical integrations and at the same time avoid the instability that is due to incompatible solutions in the overlap region. Whether or not the method will actually succeed in this purpose can only be determined from specific experiments. The method makes use of linear filtering to produce a maximum restoration of damped amplitude, and may therefore also be useful in generating initial grid point data from irregularly spaced station data as part of some general objective analysis procedure. The procedures are general and may find application in such diverse problems as that of incorporating nonsynoptic data into an objective analysis procedure or in limited-area nesting problems. (Author)

Descriptors :   (*ATMOSPHERIC MOTION, EQUATIONS OF MOTION), (*NUMERICAL INTEGRATION, NUMERICAL ANALYSIS), (*INTERPOLATION, ERRORS), WEATHER FORECASTING, FOURIER ANALYSIS, LINEAR SYSTEMS, STABILITY

Subject Categories : Meteorology
      Numerical Mathematics

Distribution Statement : APPROVED FOR PUBLIC RELEASE