A fine-wire sensor array for ground-based and airborne in-situ measurements of optical turbulence in the atmosphere
Abstract
The purpose of this project is to critically examine, refine, and improve existing turbulence models by means of in-situ field observations and theoretical analysis, occasionally supported by optical field observations and-or computer simulations. We will analyze field data from previous and future field experiments. We will deploy in-situ turbulence sensors (ultrasonic anemometer-thermometers and fine-wire resistance thermometers) on three kinds of platforms-portable meteorological towers, automobiles, anda drone.The center piece of our in-situ turbulence sensors will be a 3D array of up to six fine-wire sensors, the spacing between which will range from a few centimeters to a few meters. Each of these fine-wire sensors will be operated either as a cold-wire thermometer or as a hot-wire anemometer. The fine-wire array will enable us to collect low-noise(down to 1mK and 1mm-s, respectively), fast-response (down to about 0.1ms), high-resolution(down to 1mm) measurements of turbulent temperature and streamwise velocity fluctuations and spatial increments. These measurements will provide unprecedented information about the fine structure of sheets and turbulent layers in the stably stratified lower troposphere, and they will serve as an empirical basis for validating and refining physical models of optical turbulence. Such models will complement the Obukhov-Corrsin theory and will contribute to a more comprehensive physical understanding of non-Kolmogorov optical turbulence.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 14, 2024
- Source ID
- FA95502310741
Entities
People
- Andreas Muschinski
Organizations
- Air Force Office of Scientific Research
- Northwest Research Associates
- United States Air Force