Speaker: Liu Lei

Affiliation: Institute of Remote Sensing Satellites (IRSS) of the China Academy of Space Technology (CAST)

Academic title: Dr.

Abstract:

Sea surface ocean current observation is of vital importance for monitoring global climate change, conducting oceanographic research, and studying the physical interactions between the ocean and the atmosphere. We have proposed a multi-static MIMO SAR system for high-precision inversion of two-dimensional sea surface flow fields. This system employs a dual-transmit, multi-receive, and transmit-receive separation satellite SAR configuration. Addressing the need for wide-swath two-dimensional flow field measurements, we derived an interference phase error model to reveal the impact of non-ideal factors and system parameters on measurement accuracy. Given the squint dual-static observation geometry of this system, we further proposed an echo separation approach based on Space-Time Synthetic Aperture Radar (STSO), along with two-dimensional multi-channel channel error estimation and phase-preserving imaging methods.

Biography:

LIU LEI ( 11/02/1985) received the B.S. degree i n communication engineering from Beihang University, Beijing, China, in 2007, and Ph.D. degrees in the Institute of Electronics, Chinese Academy of Sciences ( CAS) Beijing, China, i n 2012, respectively. He has being working in Institute of Remote Sensing Satellites of China Academy of Space Technology(IRSS CAST) since August 2020. His research interests are extracting ocean features from spaceborne SAR images, and microwave scattering mechanism from ocean surface.