一种利用哨兵1号数据提取南极接地线方法

针对因IW工作模式数据在南极地区覆盖不全面导致对南极接地线的全面提取造成影响的问题,提出利用双差干涉测量提取接地线的基本原理,分别利用工作模式为IW和EW的Sentinel-1雷达卫星数据,对东南极毛德皇后地沿岸冰川接地线进行提取,将提取结果分别与MEa-SUREs接地线产品进行对比,同时再将这两种模式下的提取结果进行对比分析。结果表明,双差干涉测量可以去除冰流相位的影响,使用EW工作模式的Sentinel-1数据进行南极接地线提取可以忽略其地面分辨率较低这一缺陷,同时,这一模式的Sentinel-1数据在幅宽、南极覆盖范围等方面更具优势。因此,综合利用IW和EW工作模式的Sentinel-1数据,对南极接地线的全面、高效、长期动态监测具有重要意义。

A method of extracting the Antarctic grounding line using Sentinel-1 data

According to the problem of the influence of the comprehensive extraction of the Antarctic grounding line that due to the incomplete coverage of IW data in the Antarctic region,this paper introduced the basic principle of grounding line extraction using DDInSAR(Double Differential SAR Interferometry).Data of Sentinel-1 Radar Satellites with IW and EW operating modes were used to extract the grounding line of ice shelves along The Queen Maude Land of the Southeast Pole.The extraction results were compared with the existing grounding line product MEa-SUREs(making earth system data records for use in research environment).At the same time,the extraction results of this two models were compared and analyzed.The results show that DDInSAR can remove the influence of ice flow phase,and the low ground resolution of the Sentinel-1data in EW operating mode can be ignored when using it to extract Antarctic grounding line.Also,the Sentinel-1data from this model has advantages in terms of breath and Antarctic coverage.Therefore,the comprehensive utilization of Sentinel-1data from IW and EW operating modes is of great significance for the comprehensive,efficient and long-term dynamic monitoring of Antarctic grounding line.