Measurement of Atmospheric Turbulence on Flight Path Using Aircraft

Measurement of Atmospheric Turbulence

How light and sound propagate through the optically clear atmosphere has been of interest to children, philosophers, scientists, and engineers since antiquity. The quantum leap in our understanding of wave propagation through the turbulent atmosphere, however, came with the pioneering work by Valeryan Tatarskii and collaborators in the 1950’s and 1960’s. Their work enhanced dramatically our abi...

Double-Star Detection Using Convolutional Neural Network in Atmospheric Turbulence

In this paper, we investigate the usage of machine learning in the detection and recognition of double stars. To do this, numerous images including one star and double stars are simulated. Then, 100 terms of Zernike expansion with random coefficients are considered as aberrations to impose on the aforementioned images. Also, a telescope with a specific aperture is simulated. In this work, two k...

Measurement of atmospheric oxygen using long-path supercontinuum absorption spectroscopy

The concentration of atmospheric oxygen is measured over a 540-m path using supercontinuum absorption spectroscopy. The absorption data compared favorably with MODTRANTM 5 simulations of the spectra after adjusting for the differences of index of refraction of air and matching the instrument spectral resolution, as described by the effective slit width. Good agreement with the expected atmosphe...

Atmospheric Turbulence and Aircraft Height-Keeping Accuracy by

Detection of Obstacles in the Flight Path of an Aircraft

The National Aeronautics and Space Administration (NASA), along with members of the aircraft industry, recently developed technologies for a new supersonic aircraft. One of the technological areas considered for this aircraft is the use of video cameras and image processing equipment to aid the pilot in detecting other aircraft in the sky. The detection techniques should provide high detection ...