Haiyang (HY, Chinese: 海洋; pinyin: Hǎiyáng; lit. 'ocean') is a series of marine remote sensing satellites developed and operated by the People's Republic of China since 2002. The name "Haiyang" translates to "ocean" in English.[1] As of October 2022[update], eight satellites have been launched with ten more planned.[2][3][4][5][6] Built by the state-owned aerospace contractor China Academy of Space Technology (CAST), Haiyang satellites carry a variety of ocean-imaging sensor payloads and are operated by the National Satellite Ocean Application Service (NSOAS), a subordinate agency of the State Oceanic Administration (SOA).[7] Haiyang satellites are launched from Taiyuan Satellite Launch Center (TSLC) into Sun-synchronous orbit (SSO) aboard Long March-series rockets.[7]
China's National Satellite Ocean Application Service owns three series of Haiyang-series satellites, Haiyang-1 (HY-1) are designed to measure ocean color, Haiyang-2 (HY-2) to study maritime environment dynamics, and Haiyang-3 (HY-3) to conduct ocean surveillance.[8]