HaiYang-2A (HY-2A) is the second of a series of Earth observation satellites designed at the China National Space Administration (CNSA). The mission objective of HY-2A is to monitor the marine physical characteristics, such as Sea Surface Temperature, wind field and sea level. HY-2A was launched in August 2011 and it is still operational. The orbit has a near sun-synchronous orbit with 99.3° inclination and a repeat cycle of 14 and 168 days.