Wavelet-based cascade model for intermittent structure in terrestrial environments

• Main Authors: Wilson, D. Keith, Pettit, Chris L., Vecherin, Sergey N.
• Format: Report
• Language: unknown
• Published: arXiv 2013
• Subjects: Data Analysis, Statistics and Probability physics.data-an; Atmospheric and Oceanic Physics physics.ao-ph; Geophysics physics.geo-ph; FOS Physical sciences; Arctic
• Online Access: https://dx.doi.org/10.48550/arxiv.1312.5649; https://arxiv.org/abs/1312.5649

A wavelet-like model for distributions of objects in natural and man-made terrestrial environments is developed. The model is constructed in a self-similar fashion, with the sizes, amplitudes, and numbers of objects occurring at a constant ratios between parent and offspring objects. The objects are randomly distributed in space according to a Poisson process. Fractal supports and a cascade model are used to organize objects intermittently in space. In its basic form, the model is for continuously varying random fields, although a level-cut is introduced to model two-phase random media. The report begins with a description of relevant concepts from fractal theory, and then progresses through static (time-invariant), steady-state, and non-steady models. The results can be applied to such diverse phenomena as turbulence, geologic distributions, urban buildings, vegetation, and arctic ice floes. The model can be used as a basis for synthesizing realistic terrestrial scenes, and for predicting the performance of sensing and communication systems in operating environments with complex, intermittent distributions of scattering objects. : 58 pages, 39 figures