Haiyang-1B(HY-1B) satellite is the successor of China’s first ocean satellite (HY-1A), it takes the 10-bands Chinese Ocean Color and Temperature Scanner (COCTS) and the 4-bands CCD imager.

HY-1C satellite project adopts the a.m. and p.m. satellites network which increases observation times and improves global coverage.

HY-1D satellite project adopts the a.m. and p.m. satellites network which increases observation times and improves global coverage.