HY-1 Credit - © Mark Wade

The Haiyang-1 (HY-1 or Ocean-1) satellite was equipped with a 10-band IR ocean color scanner and a 4-band CCD camera and was designed to end China's reliance on foreign satellites for marine observation. A total of five HY-1's were planned, with one launch every other year through 2010.

The Chinese Academy of Space Technology (CAST) announced on 11 August 1998 that it was developing a small satellite bus (CAST968) for science and earth observation missions. The first two satellites based on this bus were to be the Shijian-5 (SJ-5) and Haiyang-1 (HY-1 or Ocean-1). Both satellites would weigh 340 kg and had two solar panels. HY-1 was to be equipped with a 10-band IR ocean color scanner and a 4-band CCD camera. HY-1 completed a major design review in July 1999 and an electronic test model of the spacecraft was delivered in late 1999. In October 2000 China announced that the HY-1 would launch during 2001. China's National Ocean Administration was to build two ground stations for HY-1: one in Sanya, Hainan Island, the other near Beijing.

Mass: 340 kg (740 lb).

• 2002 May 15 - Hai Yang 1 - Launch Site: Taiyuan. Launch Complex: LC1. Launch Vehicle: CZ. Mass: 360 kg (790 lb). Perigee: 793 km (492 mi). Apogee: 799 km (496 mi). Inclination: 98.80 deg.
  The HY-1 (Haiyang-1) marine observation satellite separated shortly after the FY-1D. The 360 kg HY-1 was based on the SJ-5 bus and carried an IR radiometer and CCD imager for oceanographic studies. Between May 21 and May 26, HY-1 lowered its orbit to 793 x 799 km using on-board propulsion.

• 2007 April 11 - Haiyang 1B - Launch Site: Taiyuan. Launch Complex: -. Launch Vehicle: CZ. Perigee: 782 km (485 mi). Apogee: 815 km (506 mi). Inclination: 98.60 deg. Period: 100.80 min.
  Oceanographic satellite equipped with a 10-band ocean color scanner, a 4-band CCD imager with 250-meter resolution, and an infrared water profile radiometer.