The tests included demonstration flights and testing of the drones’ operation with photo and thermal imaging systems MOSCOW, February 18. /TASS/. The Tomsk-based Geoscan Tomsk student design bureau, jointly with Tomsk State University (TSU), have tested the use of unmanned aerial systems in temperatures down to 30 degrees Celsius below zero, Geoscan's press service reported. "The tests included demonstration flights and testing of the drones’ operation with photo and thermal imaging systems.