TY JOUR TI Airborne geophysical survey with EQUATOR system for tungsten targets KW airborne geophysical surveys KW complex EQUATOR KW frequency and time electromagnetic data KW geoelectric sections JO Vestnik AGGE AU Podmogov, Y.G. AU Savinova, I.A. AU Vorgacheva, E.Y. PY 2026 IS PB Association of Geologists, Geophysicists and Engineers