The HY-2

which was launched on August 16

2011

is the first microwave marine remote sensing satellite developed by China. In this paper

the data of Significant Wave Height（ SWH） measured by satellite altimeter HY-2 were compared with the data observed by satellite altimeter Jason-1and Jason-2 as well as the data measured by buoys. It was found that there was a s ystematic error of 0. 3—0. 4 m between SWH obtained from HY-2 and other altimeters and buoys. The comparison indicated that there was a linear relationship between the data of HY-2 and buoys

which could be used to calibrate SWH measured by HY-2 to better reflect the real marine situation. Comparisons show that the results are good and HY-2 altimetry data work well with other satellite altimetry data.