1. School of Information Science and Electrical Engineering, Shandong Jiaotong University, Jinan, China
2. School of Electronic and Information Engineering, Beihang University, Beijing, China
3. Zhejiang Key Laboratory of General Aviation Operation Technology, Jiande, China
4. Department of General Aviation, Civil Aviation Management Institute of China, Beijing, China
5. Undergraduate School, Shandong University, Jinan, China