基于珠海万山定标场沿岸验潮仪的HY-2B雷达高度计定标研究

Research of calibration of HY-2B altimeter based on tidal gauge along the coast of Zhuhai,Wanshan calibration site

随着我国海洋二号B卫星(HY-2B)于2018年10月发射成功,国家卫星海洋应用中心于珠海万山进行了HY-2B的在轨测试。试验利用沿岸验潮仪,在珠海万山直湾岛HY-2B过境轨道375的星下点附近进行了由2018年11月3日至12月12日的验潮仪定标试验。在试验期间,HY-2B共重访定标场星下点3次,定标结果表明:3个周期的HY-2B雷达高度计测量海面高度定标结果良好,定标参数分别为(3.06±3.48)cm、(2.85±1.03)cm、−7.41 cm;定标参数在前3个周期存在一定漂移,需要后续的定标工作以确定漂移原因。

After the launch of China’s HY-2B altimeter in October 2018,NSOAS(National Satellite Ocean Application Service)conducted a HY-2B altimetry calibration experiment in Wanshan,Zhuhai.The experiment used the tide gauge along the coast to conduct the calibration experiment from November 3,2018 to December 12,2018,near the sub-satellite point of the HY-2B transit orbit 375 on Zhiwan Island.During the experiment period,HY-2B revisited the calibration point three times,and the results showed that the three-period HY-2B altimetry calibration bias were(3.06±3.48)cm,(2.85±1.03)cm,−7.41 cm;there was a certain drift in the calibration bias in the first three cycles,and subsequent calibration work was required to determine the cause of the drift.