TY JOUR TI ANALYSIS OF METHODS AND SELECTION OF MEASUREMENT INSTRUMENTS FOR MONITORING HARMFUL SUBSTANCES USING UNMANNED AERIAL VEHICLES KW harmful substances KW air analysis KW measuring instrument KW hard-to-reach places KW unmanned aircraft KW air complex KW gas analyzer KW industrial facility KW concentration KW air environment monitoring JO Problems of risk management in the technosphere AU Garelina, S.A. AU Rybakov, A.V. AU Zakharyan, R.A. PY 2025 IS 2025 PB Saint-Petersburg University of State Fire Service of Emercom of Russia