Bowen Bie, Guang-Cai Sun, Mengdao Xing
IGARSS 2019-2019 IEEE International Geoscience and Remote Sensing Symposium
To meet the demand for large area environment monitoring during short synthetic aperture time, this paper proposes an imaging algorithm for high squint beam steering (HS-BS) SAR platforms with constant acceleration. To achieve a good performance and high efficiency, the baseband azimuth scaling (BAS) method cannot be directly applied for the azimuth focusing. The signal is calculated based on high squint concentric circle (HS-CC) range model. The conventional derotation operation is modified by nonlinear phase and range-dependent derotation. Then the space-variant (SV) Doppler chirp rate is corrected by BAS method without sub-aperture processing.
Applications of Baseband Azimuth Scaling on High Squint Beam Steering SAR Imaging with Contant Acceleration
B Bie, GC Sun, M Xing - IGARSS 2019-2019 IEEE International Geoscience …, 2019