Calibration of Hy-2a Satellite Altimeter Based on GPS Bouy

A dedicated GPS bouy was used to calibrate the Sea Surface Height (SSH) of HY-2 altimeter in China sea. Six tests were conducted at Qinglan and Shidao. The results showed that: 1)HY-2A satellite altimeter has a drift of -0.021m/cycle after 41 cycle; 2)The bias of HY-2A altimeter was +3.78 ± 6.5cm using the dedicated GPS Buoy after the linear regression from 41~76 cycles; 3) The standard deviation of cross calibration was 8.75cm from 41 to 76 cycles.