2011/02/27 by Richard J. Mathar, Mathar, Richard J. · 1 citation
Engineering · #FOS: Physical sciences #Infrared Target Detection Methodologies #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Optical Wireless Communication Technologies #Optics (physics.optics) #Radio Wave Propagation Studies
paper · pdf · doi:10.48550/arxiv.1102.5513
openalex publication_date 2011/02/27 · openalex created_date 2022/09/03 · openalex updated_date 2026/07/28
The phase structure function accumulated by two parallel rays after\ntransmission through a layer of turbulent air is best known by a\nproportionality to the 5/3rd power of the lateral distance in the aperture,\nderived from an isotropic Kolmogorov spectrum of the refractive index. For a\nvon-Karman spectrum of the refractive index, a dependence involving a modified\nBessel function of the ratio of the distance over the outer scale is also\nknown.\n A further standard proposition is a proportionality to the path length\nthrough the atmospheric layer. The manuscript modifies this factor through a\nrefined calculation of an integral representation of the structure function.\nThe correction establishes a sub-linearity as the lateral distance grows in\nproportion to the layer thickness; it is more important for large than for\nsmall outer scales.\n