TY JOUR TI Architecture and Functional Model of the Onboard Optical Navigation and Landing System for Spacecraft on Small Solar System Bodies KW Architecture model KW C4 KW BPMN KW FlashLiDAR KW correlation optical direction finder KW optical guidance JO Izvestia Vuzov. Geodesy and Aerophotosurveying AU Lobanov, A.A. PY 2026 IS 70 PB MIIGAiK