A Smoothing Algorithm for Upper-Air Soundings.

Abstract

This report describes the development of a filtering algorithm for smoothing vertical traces of temperature, pressure and density through the atmosphere. An overlapping mean method employing an exponential weighting function was applied over several adjacent levels to calculate a smoothed value for the required point. The exponential function was chosen because it decreases symmetrically from a central value and easily incorporates a variable bandwidth; this lets users smooth profiles to the desired resolution. Upper air data needs to be interpolated to evenly-spaced intervals in the vertical prior to program execution; if it is not, resulting profiles will not be hydrostatically consistent. Based on spectral analysis of samples from two test sites, no noise was introduced into the smoothed profiles.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1991
Accession Number
ADA232853

Entities

People

  • Gregory J. Reding

Organizations

  • Air Force Technical Applications Center

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Atmospheres
  • Bandwidth
  • Computers
  • Data Sets
  • Equations
  • Errors
  • Filters
  • Filtration
  • Frequency
  • Intervals
  • Language
  • Layers
  • Mainframe Computers
  • Mathematical Filters
  • Sites
  • Stratified Fluids

Readers

  • Atmospheric Science/Meteorology
  • Computational Modeling and Simulation
  • Computer Vision.

Technology Areas

  • Space