A SIMULTANEOUS LAGRANGIAN-EULERIAN TURBULENCE EXPERIMENT1

Abstract

Simultaneous measurements of turbulent vertical velocity fluctuations at a height of 300 ft. measured by means of a fixed anemometer, small floating balloons, and airplane gust equipment at Brookhaven are presented. The resulting Eulerian (fixed anemometer) turbulence energy spectra are similar to the Lagrangian (balloon) spectra but with a displacement toward higher frequencies.