TY JOUR TI The fundamental foundations of building a system for monitoring, detecting and tracking low-power UAV radio emissions KW electromagnetic monitoring system KW unmanned aerial vehicles KW passive radar KW multipole radiation pattern KW amplitude-difference method JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Vytovtov, K.. AU Barabanova, E.. AU Ivanov, M.. PY 2026 IS 2026 PB Astrakhan State Technical University