Airborne synthetic aperture radar (SAR) has gradually become the "main force" in the field of low-altitude remote sensing due to its technical advantages of all-weather, all-time, and high resolution. It has performed particularly well in terms of real-time data, high-precision imaging, and dynamic and static target monitoring, providing new technical solutions for various application scenarios, especially in the fields of maritime surveillance, topographic mapping, power line inspection, and urban planning.
Miniature SAR System
Entering the 21st century, with the maturity of UAV technology, SAR payloads began to be widely integrated into UAV systems, enabling UAVs to possess all-weather, all-time detection capabilities. Among the most well-known are the US high-altitude, high-speed UAV series "Global Hawk" and the medium-to-high-altitude UAV series "Predator".
Following subsequent development, advancements in microelectronics and solid-state devices propelled SAR into the era of "miniaturization," leading to the emergence of small, lightweight SAR systems, also known as MiniSAR, with weights generally reduced to the kilogram level. For example, in 2004, Germany's EADS launched the world's first 4-kilogram FMCW MiSAR system, marking a breakthrough in miniaturization. In 2008, the US ImSAR's NanoSAR reduced its weight to below 2 kilograms, setting a record for single-channel Ku-band 0.3-meter resolution, and its modular design is compatible with tactical UAVs.
Based on this international trend, Tianjing Yunhu's airborne SAR has also entered a new stage of development focused on "miniaturization" and "systematization." The company has successfully developed two series and multiple types of miniature SAR products: frequency-modulated continuous wave and pulse SAR. Among them, the continuous wave radar weighs as low as 2 kg, and can be flexibly mounted on multi-rotor drone platforms such as the DJI M400. The miniature SAR is seamlessly integrated with drones through a quick-release structure, and is widely used in various fields. The application results are good, and we have cooperated with many universities, research institutes and industry companies to carry out numerous experiments in various application scenarios, with a customer satisfaction rate as high as 98%.
System Flight Video
Potential civilian applications primarily include:
- In disaster emergency response, it can penetrate clouds, fog, rain, and snow to quickly acquire high-definition images of disaster areas. Its interferometric technology can monitor millimeter-level surface deformation, providing early warnings of secondary disasters such as landslides and collapses. Its real-time imaging capability far surpasses that of spaceborne SAR, providing crucial support for on-site command.
- In marine observation, SAR is unaffected by adverse sea conditions, accurately identifying vessels, monitoring oil spills, and retrieving sea surface wind and wave information. Its real-time performance is superior to spaceborne platforms.
- In resource exploration, through multi-band penetration and polarization analysis (L, P, X, etc.), SAR can effectively detect underground veins, groundwater, and oil and gas structures. Compared to traditional drilling methods, it is not only cheaper but also more environmentally friendly.
- For subsidence monitoring, InSAR technology can capture minute deformations of buildings, bridges, and tunnels with millimeter-level precision, enabling early warnings of safety hazards in critical urban facilities. In agriculture, SAR utilizes the unique polarization scattering characteristics of crops to efficiently classify crops, monitor growth, and estimate yields.
Single Polarimetric Imaging Results
Fully Polarimetric Imaging Results
UAV-borne SAR is gradually becoming the mainstream in the market. Its miniaturization and cost reduction will drive the transformation of airborne SAR from high-end military equipment to mid-to-low-end military equipment and civilian devices, becoming the main driving force for the continued high-speed growth of the airborne SAR market in the coming years. Tianjing Yunhu will continue to improve its product portfolio, product quality, and service capabilities based on its previous achievements. We are committed to promoting the widespread adoption of domestically produced SAR, making synthetic aperture radar a truly accessible, efficient, and reliable tool for ground sensing! If you are looking for a miniaturized, lightweight, and rapidly integrateable airborne SAR deployment solution, please contact us for more product information and test data.
