Core Points - The successful launch of China's first remote sensing satellite for ocean salinity information, known as the Ocean Salinity Detection Satellite, marks a significant milestone in the country's marine satellite observation system [1][3][5] - The satellite, also referred to as Ocean No. 4 01, was launched on November 14, 2024, and has completed all in-orbit tests, meeting or exceeding design specifications [3][5] - The satellite will provide high-precision ocean salinity data to support marine environmental protection, disaster reduction, and global climate change monitoring, contributing to China's goal of becoming a maritime power [5] Summary by Category Satellite Launch and Testing - The Ocean Salinity Detection Satellite has successfully completed various critical phases, including platform operational status setup, payload activation testing, ground-satellite link establishment, and business function verification [3] - The satellite is now ready for long-term user delivery after passing all in-orbit tests [1][3] Significance and Applications - The launch fills a gap in China's satellite-based ocean salinity detection capabilities and enhances the national marine satellite observation framework [5] - In addition to measuring ocean salinity, the satellite will also monitor soil moisture, addressing needs in drought monitoring, agricultural environmental monitoring, and numerical weather forecasting [5]