China attaches great importance to the development of marine remote sensing and monitoring technology. The ocean remote sensing systems with complementary vantages offer significant economic and social benefits. HY-1A/B data have been widely used in seasurface temperature forecasting

sea ice operational monitoring in winter

red tide and green tide monitoring in summer

dynamic monitoring of coastal zones

coastal water quality monitoring

and fishery remote sensing. The HY-2A satellite fills the gaps of ocean dynamic environment satellite remote sensing and is the world’s only in-orbit comprehensive ocean dynamic environment satellite that carries active and passive microwave remote sensors. HY-2A can simultaneously obtain data on sea-surface wind field

significant wave height

sea surface height

and sea surface temperature. The effectiveness of ocean environment monitoring and catastrophic sea condition forecasting has been improved with the use of satellite data. Ocean satellites provide reliable remote sensing data to the national economy and defense construction

marine scientific research

and global change research. They also play an important role in the international Earth observation system and are highly recognized by domestic and foreign users.HY-1 and HY-2 series satellites lay a solid foundation for the establishment of a sound ocean environment stereo monitoring system in China. With national development and the implementation of "the Belt and Road" strategy in China

the construction of maritime power

the safeguarding of marine rights and interests

and the development of marine economy demand high requirements and emphasize the urgent need for ocean remote sensing. Therefore

the "Long-term Development Plan of Civil Space Infrastructure（2015—2025）" is focused on the national maritime power strategy and establishes the plan for the ocean satellite series. This development plan is aimed at supporting the areas of marine resource survey

environment protection

disaster prevention and reduction

rights and interests safeguarding

management of sea areas

island and coastal zone investigation

and the polar ocean expedition of China. Moreover

the requirements of land and atmosphere observations are taken into account. On the basis of the development experience and application achievement of HY-1A/B

HY-2A

GF-3

and CFOSAT

multiple optical and microwave remote sensing techniques are developed

a new generation of ocean color and ocean dynamic environment satellites is built for marine networking observation

and ocean monitoring satellites are improved to construct an integrated marine satellite monitoring system. Ocean remote sensing satellites will inevitably play an import role in the process of building maritime power through the construction of space infrastructure.