Advanced HRWS Spaceborne SAR: System Design and Signal Processing

Dear Colleagues,

Spaceborne synthetic aperture radar (SAR) operates by transmitting an electromagnetic wave towards the Earth's surface and recording the reflections to generate high-resolution images. The importance of SAR high-resolution wide-swath imaging lies in its capacity to capture detailed information over large areas with high spatial resolution. This capability enables scientists and decision-makers to monitor changes in the environment, detect natural disasters, assess crop health, and map urban areas with unparalleled detail. In environmental monitoring, SAR imaging can track deforestation, monitor land cover changes, and assess the health of ecosystems. In disaster management, SAR plays a critical role in detecting and monitoring floods, landslides, and earthquakes, facilitating timely response and mitigation efforts. In summary, SAR high-resolution wide-swath imaging provides a powerful tool for scientific research, environmental monitoring, and disaster management. Its ability to capture detailed information over large areas, under any weather conditions, makes it indispensable for understanding and managing our planet’s resources and hazards. However, the present generation of SAR systems still suffers from a tradeoff between range ambiguity and azimuth ambiguity, and these systems do not allow for simultaneous high spatial resolution and wide coverage, meaning that they cannot meet the expanding application requirements and increasingly stringent technical requirements.

The aim of this Special Issue about SAR HRWS system design and imaging is to explore advancements, methodologies, and innovations in the development of SAR systems capable of achieving high-resolution and wide-swath imaging simultaneously. This includes research on system design considerations, antenna configurations, waveform design, signal processing algorithms, calibration techniques, and validation methods specific to SAR HRWS systems. This Special Issue seeks to address the technical challenges associated with designing and implementing SAR systems that can provide high-resolution imagery over a wide area, which is crucial for various applications in remote sensing.

This subject relates to the Remote Sensing journal as it aligns with the journal’s objective of publishing cutting-edge research in the field of remote sensing technology and applications. SAR is a prominent remote sensing technique widely used for earth observation, environmental monitoring, disaster management, and other applications. The design and development of SAR systems capable of HRWS imaging represent a significant advancement in remote sensing technology, with implications for enhancing data acquisition capabilities and improving the quality and coverage of remote sensing imagery. By featuring a Special Issue on SAR HRWS system design and imaging, the Remote Sensing journal provides a platform for researchers and practitioners to disseminate their findings, exchange knowledge, and contribute to the advancement of SAR technology and its applications in remote sensing.

This Special Issue welcomes articles on the following themes:

1. HRWS SAR system design;
2. Novel antenna configurations for HRWS SAR systems;
3. Advanced radar waveform design for HRWS imaging;
4. High-resolution spaceborne SAR imaging algorithms;
5. Beamforming method;
6. Ambiguity suppression method;
7. MIMO SAR technology;
8. Advanced signal processing method for enhancing HRWS image quality;
9. Accurate spaceborne SAR calibration methods;
10. The novel concept of the future spaceborne SAR.

Dr. Guodong **
Prof. Dr. Daiyin Zhu
Prof. Dr. **nhua Mao
Dr. Wei Wang
Dr. Yanyan Zhang
Dr. Yashi Zhou
Guest Editors

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• spaceborne synthetic aperture radar
• HRWS SAR system design
• high-resolution SAR imaging method
• ambiguity suppression
• SAR waveform design
• beamforming