海洋二号雷达高度计南极冰盖高程数据处理  

Antarctic ice sheet elevation data processing based on HY-2A altimetry

作　　者：熊雨静 许可 蒋茂飞 XIONG Yu-jing;XU Ke;JIANG Mao-fei(National Space Science Center,Chinese Academy of Sciences,Beijing 100190,China;University of Chinese Academy of Sciences,Beijing 100190,China)

机构地区：[1]中国科学院国家空间科学中心,北京100190 [2]中国科学院大学,北京100190

出　　处：《电子设计工程》2018年第21期16-20,25,共6页Electronic Design Engineering

摘　　要：南极冰盖对于全球气候变化具有重要影响,将海洋二号(HY-2A)卫星测得的数据用于南极冰盖高程变化的研究,可获得更细时间粒度的南极冰盖变化情况,同时可拓展HY-2A数据的应用范围。本文结合OCOG算法、Beta 5算法、ice2算法分别对HY-2A高度计回波波形进行重跟踪,并对重跟踪之后的数据进行升降轨交叉点定标,进而评估出算法在交叉点差值标准差这一维度下改进OCOG算法表现出更好的性能,最后利用改进OCOG算法处理后数据观察到南极冷暖季的冰面高程变化情况。The Antarctic ice sheet has an important impact on global climate. Radar altimeters have been used to make measurements of elevation change of Antarctic ice sheets.To expand the application of HY-2 A,the OCOG algorithm,Beta 5 algorithm and ice2 algorithm are respectively used to retrack the Antarctic elevation data measured by HY-2 A. The most effective way of determining the elevation of the Earth＇s large ice sheets using radar altimeters is to examine the difference in the elevation measured on ascending and descending orbit. Here,the crossover difference observed by HY-2 A over the Antarctic ice sheet is examined. And the improved OCOG algorithm shows better performance under the condition of standard deviation. Finally,the ice surface elevation changes in the Antarctic warm-cold season are observed by using the data processed by the improved OCOG algorithm.

关 键 词：海洋二号卫星 重跟踪算法 交叉定标 南极高程 

分 类 号：TN953[电子电信—信号与信息处理]