An Advanced Lightweight Dual-Band Digital Array SAR System: Earth Observation Imaging and Moving Target Detection

High-resolution synthetic aperture radar (SAR) imaging has great application potential in terrain mapping, oceanographic observation, air-to-ground reconnaissance and regional surveillance. Low cost, light weight and multiple modes are important trends in the future development of SAR systems. The A...

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Bibliographic Details
Published in:IEEE sensors journal 2023-09, Vol.23 (18), p.1-1
Main Authors: Wang, Bingnan, Song, Chong, Liu, Ning, Liu, Zhongsheng, Zhou, Liangjiang, Xiang, Maosheng
Format: Article
Language:English
Subjects:
airborne synthetic aperture radar (SAR)
Antennas
Beamforming
Data processing
digital array SAR
Digital imaging
Doppler beam sharpening (DBS)
Electrons
Flight tests
ground moving target indication (GMTI)
High resolution
Image resolution
Lightweight
Moving targets
multimode SAR
Radar
Radar antennas
Radar detection
Radar imaging
Real-time systems
Sensors
Synthetic aperture radar
Target detection
Terrain mapping
Test stands
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Summary:High-resolution synthetic aperture radar (SAR) imaging has great application potential in terrain mapping, oceanographic observation, air-to-ground reconnaissance and regional surveillance. Low cost, light weight and multiple modes are important trends in the future development of SAR systems. The Aerospace Information Research Institute, Chinese Academy of Sciences (AIRCAS), developed a state-of-the-art X/P dual-band lightweight digital array SAR system (X/P-DASAR) with a compact unit weighing less than 20 kg, which can be easily installed in a wide range of aircraft. This system adopted the integrated design of the X/P dual-band to realize the common aperture of the dual-band antenna, and employed digital beamforming technique to enable multiple radar modes such as large-swath scanning imaging, SAR high-resolution imaging, and detection of slow and small ground moving targets. Furthermore, it implements on-board real-time processing of currently multimode received data. X/P-DASAR serves as a test bed for the development, implementation, and testing of advanced radar technique applicable to earth observation imaging and moving target detection. In 2021, airborne test flights of the X/P-DASAR system were conducted in Meishan city, Sichuan Province. The data processing results verified the system's excellent capabilities of 0.1 m high-resolution imaging and 4 km/h ground slow moving target detection.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2023.3303416