On October 25, 2018, the Ministry of Science and Technology in China held a review meeting for the national 863 Program's major project titled "Star Grid Comprehensive Quantitative Remote Sensing System and Application Demonstration (Phase I and Phase II)" in Beijing. This event marked a significant milestone in China's efforts to enhance its Earth observation capabilities through advanced remote sensing technologies. The comprehensive quantitative remote sensing system represents a crucial step in leveraging satellite, aerial, and ground-based observation resources to improve the accuracy and efficiency of remote sensing data acquisition and application. It reflects a growing global trend toward integrated Earth observation systems that can provide more reliable and timely environmental information. In China, the Ministry of Science and Technology has prioritized the development of integrated quantitative remote sensing systems as one of the key areas in Earth observation and navigation technology. The project focuses on critical technologies such as satellite-ground coordination, networked satellite operations, and rapid processing of multi-scale remote sensing data. It also aims to develop comprehensive remote sensing products, conduct authenticity testing, and offer proactive remote sensing services driven by specific events, as well as operational support for resource and environmental monitoring. The first and second phases of the project were led by the Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences. The first phase ran from January 2012 to June 2015, with a total investment of 96.12 million yuan and included 11 research topics. The second phase, from January 2013 to June 2016, received 37.1 million yuan and focused on three main themes, two of which were managed by the Institute of Remote Sensing and Digital Earth. By 2015, the project achieved several international breakthroughs, including multi-satellite coupling network imaging planning, active multi-source data services, and collaborative inversion of surface parameters at the pixel level. These achievements marked the first time China transitioned from single-sensor quantitative remote sensing systems to a multi-satellite collaborative framework that is independent of specific sensor configurations. During the acceptance review on October 25, 2018, experts reviewed the project’s outcomes, watched system demonstrations, and assessed the materials. After detailed discussions, they concluded that both phases met all the required objectives and successfully passed the final evaluation. This project has significantly enhanced China’s ability to monitor critical areas such as mineral resources, regional rivers, grain production, forest resources, and ecological environments—key factors for sustainable economic development. It also supports major initiatives like the Global Eco-Environment Remote Sensing Monitoring Report, the Digital Belt and Road, the National Integrated Earth Observation Data Sharing Platform, and the Hainan Province and South China Sea Spatial Big Data Center. (Source: National Remote Sensing Center, Chinese Academy of Sciences, Ministry of Science and Technology)

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