TY JOUR TI Distance Estimation Based on Laser Beam Divergence in Geodetic Monitoring Systems KW computer vision KW geodetic monitoring KW alignment monitoring systems KW laser spot tracking KW open source KW laser beam divergence JO Izvestia Vuzov. Geodesy and Aerophotosurveying AU Mareev, A.V. AU Makeev, A.V. AU Kargina, L.A. AU Yangalyshev, V.R. PY 2026 IS 70 PB MIIGAiK