水位变化的Sentinel-3B测高数据提取方法研究  

Research on the method of extracting water level change using Sentinel-3B altimetry data

作　　者：蔺文奇 文汉江[1] 陈亦鸣 刘焕玲[1] 张放 LIN Wenqi;WEN Hanjiang;CHEN Yiming;LIU Huanling;ZHANG Fang(Chinese Academy of Surveying and Mapping,Beijing 100036,China;Land Satellite Remote Sensing Application Center,Ministry of Natural Resources,Beijing 100048,China)

机构地区：[1]中国测绘科学研究院,北京100036 [2]自然资源部国土卫星遥感应用中心,北京100048

出　　处：《测绘科学》2022年第6期8-14,共7页Science of Surveying and Mapping

基　　金：DAAD战略合作伙伴与专题研究合作网络项目(57421148);高分辨率对地观测系统重大专项(42-Y20A09-9001-17/18);中国测绘科学研究院基本科研业务费项目(AR2016,AR2126);武汉大学地球空间环境与大地测量教育部重点实验室开放基金项目(18-01-05)

摘　　要：针对利用测高数据研究内陆河流的水位变化以及近岸污染波形的处理问题,该文选用2018年11月—2021年3月长江干流宜昌和监利段Sentinel-3B卫星的level-2级陆地产品,并分别使用重心偏移(OCOG)、海洋(OCEAN)、冰-1(ICE1)和多波峰持续(MWaPP) 4种重跟踪算法改正后,提取了实验区的水位变化序列,同时利用水文站的同期实测水位进行验证分析;再结合实验区近岸采样点数据对4种重跟踪算法的精度进行对比分析。结果显示,利用Sentinel-3B测高数据提取的长江中游段水位变化序列基本可以反映水文站实测水位的变化且变化趋势大致相同;对受到陆地污染的原始波形,多波峰持续算法较其他3种算法具有更高的精度和稳定性。Aiming at the problem of using altimetry data to study the water level change of inland rivers and the treatment of nearshore polluted waveform, the article selected the level-2 land products of the Sentinel-3 B satellite in the Yichang and Jianli stations of the Yangtze River Mainstream from November 2018 to March 2021,and after correction by four retracking algorithms, offset center of gravity, OCEAN,ICE1 and multiple waveform persistent peak(MWaPP),Series of water level change of the corresponding experimental area was extracted. At the same time, the water level measured at hydrological station was used for verification and analysis;Combined with the data of nearshore sampling points in the experimental area, the accuracy of four retracking algorithms was compared and analyzed. The results showed that the series of water level change of the middle reaches of the Yangtze River extracted by the Sentinel-3 B altimetry data could basically reflect the changes of the water level measured by the hydrological station and the trend of change was roughly same. For the original waveforms affected by the land, the MWaPP algorithm had higher accuracy and stability than other three algorithms.

关 键 词：长江干流 Sentinel-3B 重跟踪算法 水位变化 

分 类 号：P228.3[天文地球—大地测量学与测量工程]