Modeling and Analysis of Angular Glint Characteristics for Complex-Coated Targets Based on Scattering Center Forward Model

A novel approach for modeling and analyzing angular glint errors (AGEs) based on scattering center (SC) forward model is proposed in this communication. Target scattering is decomposed into coherent superposition of 3-D SCs using ray-tracing and diversity techniques. The parametric formula for AGE calculation based on SCs is derived through the phase gradient method (PGM). Accounting for the effects of weak scattering mechanisms on phase-front variations and modeling accuracy, such as coating surface scattering and edge diffraction, a forward calculation process for the amplitude and position of relevant SCs is developed grounded in high-frequency electromagnetic (EM) theory. The proposed approach is validated through simulations of typical scattering structures and complex targets, revealing the relationship between SC types and AGE. This work provides a systematic framework for AGE analysis and explores the potential of SC-based AGE modeling through coating materials in EM intelligent control.