On August 21st, the reporter learned from the National Space Administration that the world's first high-orbit synthetic aperture radar satellite, Landsat 4 01, launched on August 13th and entered the engineering implementation phase, successfully entered its working orbit after four orbital changes. As of now, the Synthetic Aperture Radar (SAR) antenna carried by the satellite has been successfully deployed and the main work of flight control tests in the early stage of satellite orbit has been completed. The satellite is operating normally and in good condition, and will continue to conduct in orbit testing and other work in the future. The Landsat 4 01 satellite is a remote sensing research satellite in the "National Medium and Long Term Development Plan for Civil Space Infrastructure (2015-2025)". Meng Lingjie, Deputy Chief Designer of the Earth Observation and Data Center of the National Space Administration, stated that in the past year, China has launched more than 200 satellites. The national civil space infrastructure system in China, mainly composed of satellite remote sensing, communication, and navigation, has initially taken shape. In the future, we will continue to improve the construction of national space infrastructure, promote the development of remote sensing, communication, and navigation satellite integration technology, and accelerate the improvement of spatial information service capabilities with ubiquitous connectivity, precise spatiotemporal, and full dimensional perception. It is reported that in the development of the Land Exploration No. 4 01 satellite project, a large-diameter circular reflector antenna with phased array feed scheme was innovatively proposed for the first time and realized engineering, while driving technological progress in related basic theories, system design, and precision manufacturing. This satellite can serve the application needs of seven industries, including disaster prevention and mitigation, earthquake monitoring, land and resource exploration, and ocean, water conservancy, meteorology, agriculture, environmental protection, and forestry. It is currently the most widely used remote sensing satellite in China's industry. After being put into use in the future, China will further improve its space-based disaster monitoring system, enrich observation methods in key regions of China, and comprehensively enhance the comprehensive level of disaster prevention, reduction, and relief in China. (New News Agency)