1. School of Aeronautics and Astronautics; University of Electronic Science and Technology of China (UESTC); Chengdu Sichuan China
2. School of Automation; UESTC; Chengdu Sichuan China
3. Surveying and Geospatial Engineering, School of Civil and Environmental Engineering; University of New South Wales; Sydney Australia
4. School of Aeronautics and Astronautics; UESTC; Chengdu Sichuan China
5. University Grenoble Alpes, CNRS and also with Inria, Grenoble; GIPSA-Lab; Grenoble 38400 France
6. Inria; Grenoble France