In November of this year, 23 of the Second Academy of Aerospace Science and Technology of China successfully developed the first terahertz video SAR radar in China. It conducted flight tests in Shaanxi recently and successfully obtained the first set of terahertz video SAR images in China.

Synthetic Aperture Radar (SAR) is an active earth observation system that can be installed on aircraft, satellites, spacecraft and other flight platforms to observe the ground all day and all weather. Therefore, the SAR system has unique advantages in disaster monitoring, environmental monitoring, marine monitoring, resource exploration, crop yield estimation, surveying and mapping, etc., and can play the role that other remote sensing methods are difficult to play, so it is receiving more and more attention from all countries in the world.

According to reports, the terahertz wavelength is between millimeter wave and infrared. Compared with traditional millimeter wave and microwave imaging radar, the terahertz radar imaging system has higher resolution and shorter imaging time, which can realize video imaging effect similar to optical imaging. In particular, the ability to detect and identify slow moving targets on the ground has been greatly improved. The terahertz radar imaging system can make up for the shortcomings of optical, infrared and traditional radars for slow moving targets, and can greatly improve the readability of synthetic aperture radar images, and lay a technical foundation for moving target detection applications in complex environments.

Compared with the optical infrared imaging system, the terahertz radar imaging system has stronger penetrating ability, can image the ground target normally in the environment of smoke, smog and the like, and is not affected by the sunshine condition, and can truly satisfy any The application of time is a new type of radar technology with great development potential.

The acquisition of this important achievement has promoted the research and development of China's terahertz radar technology, marking a step closer to the application of terahertz video SAR. In the future, this technology will be promoted and applied in the field of counter-terrorism and will play an important role in national defense and public safety.

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