Biograph: Prof. Teng Long was born in January 1968. He received the Ph.D. degree from Beijing Institute of Technology (BIT) in 1995. Afterwards, he joined the faculty of BIT, where he became Professor in 2002, Director of Radar Research Laboratory from 2004, Dean of School of Information and Electronics from 2009 to 2016, Assistant President from 2016 to 2018 and Vice President from 2018.
His research interests include the fundamental and significant issues of the novel radar system and signal processing. His work includes the novel one-dimensional high resolution imaging radar, two-dimensional synthetic aperture imaging radar and the new technology and application of the real-time signal processing technology in air to Earth detection. He has published two academic books and over 300 academic papers including 100 papers indexed by SCI and 200 papers indexed by EI. He has been authorized more than 80 patents for invention and applied more than 50 patents for invention. He has received 1 second prize of National Technological Invention Award (ranks first), 1 first prize of Education and Teaching Achievements of Beijing (ranks second).
He was the Chief Scientist of National Basic Research Program and National High Technology Research and Development Program of China. He is the Member of Experts Group of National Science and Technology Major Project. He is the Yangtze River Scholar Distinguished Professor by the Ministry of Education of China. He received the Distinguished Young Scholar Fund of the National Natural Science Foundation. He received the National High-level Personnel of Special Support Program (Ten Thousand Leading Talent Plan), Award of National Hundred, Thousand and Ten Thousand Talent Project, Award of National Young and Middle-aged Experts with Outstanding Contributions, Award of Youth Science and Technology Innovation Leader of National Talent Project and Award of Hundred Leading Talent of Beijing Science and Technology. He is the leader of the Novel Radar System and Real-Time Signal Processing Team of the Ministry of Education of China, and the Leader of Program of Introducing Talents of Discipline to Universities. He is also the Member of the 7th Evaluation Committee of Academic Degrees of the State Council.
He is the President of Signal Processing Society of Chinese Institute of Electronics (CIE), the President of the Signal Processing Branch of China Instrument and Control Society (CIS), the Vice Director of Radio Location Society of CIE and the President of Intelligent Information Processing Industrialization Society of China High-Tech Industrialization Association (CHIA). He is also a Fellow of the Institute of Engineering and Technology (IET) and a Fellow of CIE. He was the General-Chair of IET International Radar Conference 2009, the Honorary-Chair of IET International Radar Conference2013 and 2015 respectively, and the General-Chair of National Conference on Signal Processing Engineer and National Academic Annual Conference of Signal Processing for many times.
He was awarded the Special Government Allowances of the State Council, the May 4th Youth Medal of Beijing, the Outstanding Teacher of Beijing, the Fok Ying-Tong University Outstanding Young Teacher and the Top Ten Outstanding Youth of Beijing. His team was awarded the Excellent Scientific and Technological Innovation Team of National Defense Science and Technology Industry and the Advanced Group of National Education System.
Title:Research progress on geosynchronous SAR system analysis and information processing in China
Abstract: The geosynchronous SAR (GEO SAR) runs on a geosynchronous orbit at a height of 36000 km, which has a certain inclination and thus is not geostationary. The relative movement between GEO SAR and ground targets can be obtained to achieve two-dimensional SAR imaging. Compared with the traditional low Earth orbit SAR (LEO SAR), GEO SAR has irreversible advantages of short revisit period (several hours), large observation coverage (hundreds to thousands of kilometers), etc.
However, the orbit height of GEO SAR increase by two orders of magnitude than LEO SAR, leading to great changes of the information acquisition and recovery: the synthetic aperture time reaching several minutes or even tens of minutes, echo round-trip delay reaching up to the sub-second level, wide swath covering thousands of kilometers.
The influences of non-ideal factors, such as ionosphere, will be time-space varying accordingly as the integration time and the swath increase. Due to the huge variance of the slant range history in time-space dimension, the classical SAR system design and signal processing methods have obvious errors or even fail.
The scope of this speech is to generally state the GEO SAR concept, the key problems and the corresponding solutions, including system design and performance analysis, accurate imaging algorithms under curved trajectory and large wide swath, time-space varying ionospheric effects and compensation, the equivalent validation experiment based on Beidou navigation satellites. Finally, the representative achievements and research institutes in China are summarized, and the development trends of GEO SAR in future are prospected.