Haiyang (satellite)

First launched aboard a Long March 4B rocket with Fengyun-1D in May 2002 into sun-synchronous orbit, the 367 kg HY-1A measures 1.2m × 1.1m × 0.94m reaching a total length of 7.5 meters with its solar panels extended.

[9][10] All four Haiyang 1 satellites (HY-1A through HY-1D) bear two maritime imaging sensors, the Chinese Ocean Color and Temperature Scanner (COCTS) and the Coastal Zone Imagery (CZI).

Developed by the Shanghai Institute of Technical Physics (SITP), a subcomponent of the China Academy of Sciences (CAS), COCTS comprises a focal plane array (FPA), scanner, an electronics box, and a series of optics.

[9][11] Also aboard all four HY-1 satellites is a Coastal Zone Imagery (CZI), developed by the Beijing Institute of Space Mechanics and Electricity (BISME, Chinese: 北京空间机电一体化研究所) under CAST.

Sometimes referred to as the satellites' four-band CCD imager", CZI is intended to provide 250 m spatial resolution imagery over coastal regions in 36° (500 km) swaths.

[14] Used in conjunction with COCTS and CZI, HY-1C and HY-1D have been used to identify harmful algae blooms such as cyanobacteria in Lake Tai, detect marine oil spills near Indonesia, and measure nearshore turbidity with atmospheric correction.