基于GNSS浮标和验潮资料的HY-2A卫星高度计绝对定标

发布时间：2018-10-30 12:25

【摘要】：为探测我国HY-2A卫星高度计海面高测量绝对偏差及其在轨运行状态,本文利用GNSS浮标星下点同步测量和验潮资料海面高传递方法在山东千里岩和珠海担杆岛海域开展定标研究。为验证GNSS浮标定标方法的准确性,还对国外卫星Jason-2和Saral进行了定标实验。实验表明GNSS浮标绝对海面高测量精度达2cm,对Jason-2和Saral高度计多个周期定标得到的海面高偏差均值分别为5.7cm和-2.3cm,与国际专门定标场的结果符合较好。2014年9月和2015年5月HY-2A卫星高度计浮标定标结果分别是-65cm和-91cm,因两次结果差异显著,故又利用千里岩验潮站资料对HY-2A卫星高度计第56至73周期进行了定标分析,结果证明HY-2A卫星海面高存在约-51cm/a的漂移,置信度为95%的回归分析表明浮标和验潮定标结果符合。本文研究结果表明在我国尚无专门定标场的情况下,可利用GNSS浮标对我国高度计实施灵活、精准的在轨绝对定标,在有高度计轨迹经过验潮站的情况下可使用验潮资料结合精密大地水准面模型进行绝对定标。
[Abstract]:In order to detect the absolute deviation of sea surface height measurement of HY-2A satellite altimeter in China and its operational state in orbit, In this paper, the method of sea surface height transfer based on the GNSS buoy subsatellite synchronous measurement and tide measurement data is used to study the calibration of Qianli Rock and Zhuhai Guozhoudao Sea area in Shandong Province. In order to verify the accuracy of the GNSS buoy calibration method, the calibration experiments of foreign satellites Jason-2 and Saral are also carried out. The experimental results show that the absolute sea surface height measurement accuracy of GNSS buoy is 2 cm, and the mean deviation of sea surface height for Jason-2 and Saral altimeters is 5.7cm and -2.3 cm, respectively. The results of HY-2A satellite altimeter buoy calibration in September 2014 and May 2015 are-65cm and -91 cm respectively. Therefore, the calibration analysis of the 56-73 period of HY-2A altimeter is carried out by using the data of Qianli Rock tide gauge station. The results show that the sea surface height of HY-2A satellite exists the drift of about-51cm/a. The regression analysis of 95% confidence indicates that the buoy and tide calibration results are consistent. The results show that the GNSS buoy can be used to implement the flexible and accurate absolute calibration of the altimeter in orbit when there is no special calibration field in China. When the altimeter track passes through the tide gauge station, the absolute calibration can be carried out by using the tide gauge data and the precise geoid model.
【作者单位】：国家海洋局第一海洋研究所;山东科技大学测绘科学与工程学院;国家卫星海洋应用中心定标检验部;
【基金】：国家国际科技合作专项“自主星载高度计海面测高在轨绝对定标关键技术研究”(2014DFA21710) 中央级公益性科研院所基本科研业务费专项资金资助项目(GY0214G21,GY0214G23,GY02-2011T05) 开展卫星海洋测绘应用(WX0316005)
【分类号】：P715.2;P715.6

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