Corrigendum: Radiological Mapping of Post-Disaster Nuclear Environments Using Fixed-Wing Unmanned Aerial Systems: A Study From Chornobyl - Connor, Dean T.; Wood, Kieran; Martin, Peter G.; Goren, Sevda; Megson-Smith, David; Verbelen, Yannick; Chyzhevskyi, Igor; Kirieiev, Serhii; Smith, Nick T.; Richardson, Tom; Scott, Thomas B. (Frontiers in Robotics and AI, 2020)