id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
9s161546d84	Christopher O. Porter	The Optical Environment from the Tip Vortices of a Helicopter in Different Flight Regimes	2011		.txt	text/plain	361	11	33	To date, aero-optics research has focused primarily on fixed-wing aircraft travelling at compressible-flow speeds, where compressible shear layers and turbulent boundary layers are the dominant source of aero-optic aberrations. Aero-optical aberrations associated with turbulent compressible flow fields can seriously degrade the performance of an optical system; the effect of these aberrations increases as the wavelength of the transiting light becomes shorter, and so is particularly strong at visible and near-infrared wavelengths.	cache/9s161546d84.txt	txt/9s161546d84.txt