“海哨二号/AIRSAT05星”卫星获取的北极拉普捷夫海陆-海-冰SAR宽幅多极化遥感影像

封面图像为2025年10月28日“海哨二号/AIRSAT05星”卫星以TOPSAR宽幅成像模式获取的北极拉普捷夫海沿岸地区双极化伪彩色影像。图中蜿蜒的亮黄色条带为勒拿河主河道及三角洲分流，其高后向散射特征显著;北部海域大面积分布的黄绿与蓝紫色调区域为不同形态与厚度的海冰，与深蓝色水域交织分布，纹理清晰;在勒拿河入海口，海冰边缘呈现破碎、混杂的过渡带。影像精准刻画了河流输入对海冰生成的影响及沿岸冰情，为研究北极海冰关键过程提供了高分辨率观测依据。“海哨二号/AIRSAT05星”卫星是国际首颗全极化宽幅X波段星载SAR，最大成像幅宽超过300 km，它于2025年8月19日成功发射。该卫星具备星上智能化“成像—检测”处理与星—船互通能力，重点满足我国极地与深远海广域观测迫切需求。“海哨二号/AIRSAT05星”研制工作得到了国家重点研发项目支持。

Land-Sea-Ice SAR wide-swath multi-polarization remote sensing image of the Arctic Laptev Sea acquired by 
the "Haishao-2 / AIRSAT05" satellite 

This cover image is a dual-polarization false-color composite acquired on October 28, 2025, by the "Haishao-2 / AIRSAT05" satellite in TOPSAR wide-swath imaging mode over the coastal region of the Laptev Sea, Arctic. The sinuous, bright yellow ribbon represents the main channel and distributaries of the Lena River Delta, exhibiting pronounced high backscattering characteristics. The extensive area to the north, colored in yellow-green and bluish-purple hues, corresponds to sea ice of varying forms and thicknesses, intricately intermixed with dark blue open water, displaying clear textural variations. At the Lena River's estuary, the sea ice edge forms a fragmented and mixed transition zone. The image accurately depicts the influence of riverine freshwater input on sea ice formation and the detailed coastal ice conditions, providing high-resolution observational evidence for studying key processes of Arctic sea ice. The "Haishao-2 / AIRSAT05" satellite, internationally recognized as the first fully polarimetric wide-swath X-band spaceborne SAR, features a maximum imaging swath exceeding 300 km. It was successfully launched on August 19, 2025. The satellite is equipped with onboard intelligent “imaging-detection” processing capabilities and satellite-to-ship communication functions, specifically designed to address China’s urgent needs for extensive 
polar and open-ocean observation. The development of the "Haishao-2 / AIRSAT05" satellite was supported by National Key Research and Development Program of China.

拉页：图片为 2025 年11月1日“海哨二号/AIRSAT05星”卫星以TOPSAR 宽幅成像模式获取的北极北地群岛双极化伪彩色影像。