A Smoothing Algorithm for Upper-Air Soundings.
AIR FORCE ENVIRONMENTAL TECHNICAL APPLICATIONS CENTER SCOTT AFB IL
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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.
- Atmospheric Physics
- Computer Programming and Software