目前我国在轨遥感卫星数量已达到400余颗

Core Insights - The National Space Administration of China has reported that the number of operational remote sensing satellites in orbit has exceeded 400, covering various types including optical, hyperspectral, infrared, and microwave, enabling all-weather and all-time Earth observation [1] Group 1: Remote Sensing Satellite Development - The National Space Administration has integrated both civil and commercial satellite resources to create a virtual satellite constellation for remote sensing [1] - An emergency response mechanism for civil and commercial remote sensing satellites has been established, leveraging the advantages of different satellite technologies [1] Group 2: Data Support for Disaster Management - By 2025, the demonstration scenario construction is expected to yield substantial results, with 159 domestic and international remote sensing emergency disaster monitoring operations conducted, and over 5,700 satellite imaging sessions completed [1] - High-quality remote sensing data has been provided domestically with over 23,000 scenes and internationally with over 1,600 scenes, supporting disaster prevention and relief efforts [1] - The rapid coordination of multiple civil and commercial remote sensing satellites for emergency imaging during disasters such as the 2025 earthquake in Shigatse, Tibet, and flooding in Guizhou and North China has been highlighted [1]