张国栋, 郭健, 杨东凯, 王峰, 高洪兴. 星载GNSS-R海冰边界探测方法[J]. 武汉大学学报 ( 信息科学版), 2019, 44(5): 668-674. DOI: 10.13203/j.whugis20170050
引用本文: 张国栋, 郭健, 杨东凯, 王峰, 高洪兴. 星载GNSS-R海冰边界探测方法[J]. 武汉大学学报 ( 信息科学版), 2019, 44(5): 668-674. DOI: 10.13203/j.whugis20170050
ZHANG Guodong, GUO Jian, YANG Dongkai, WANG Feng, GAO Hongxing. Sea Ice Edge Detection Using Spaceborne GNSS-R Signal[J]. Geomatics and Information Science of Wuhan University, 2019, 44(5): 668-674. DOI: 10.13203/j.whugis20170050
Citation: ZHANG Guodong, GUO Jian, YANG Dongkai, WANG Feng, GAO Hongxing. Sea Ice Edge Detection Using Spaceborne GNSS-R Signal[J]. Geomatics and Information Science of Wuhan University, 2019, 44(5): 668-674. DOI: 10.13203/j.whugis20170050

星载GNSS-R海冰边界探测方法

Sea Ice Edge Detection Using Spaceborne GNSS-R Signal

  • 摘要: 针对星载接收平台提出了一种利用全球导航卫星系统反射信号(Global Navigation Satellite Systemreflectometry,GNSS-R)进行海冰边界探测的方法。该方法利用导航卫星信号经海冰和海水表面散射后反射信号时延相关功率映射(delay map,DM)的差异,结合镜面反射点位置来探测海冰边界。利用自适应阈值调整算法处理TDS-1卫星数据,获取有效的DM数据,进而得到DM衍生量随镜面反射点位置的变化趋势,并设置DM衍生量的阈值来识别海冰。与全球海冰分布图对比发现,DM衍生量阈值对应的镜面反射点位置与海冰分布图的海冰边界位置基本吻合,证明了DM的有效区时延距离、相关功率的峰值和归一化标准差均可用于海冰边界探测,星载GNSS-R技术在海冰边界探测领域具有较大潜力。

     

    Abstract: A spaceborne sea ice edge detecting method is developed using the Global Navigation Satellite System reflectometry (GNSS-R). The difference of reflected signal delay map (DM) were observed in the satellite reflected signal of sea ice relative to those of sea water. Combined with specular reflection point location, it can be used to detect sea ice edge. An adaptive threshold algorithm is employed to process TDS-1 satellite data for the available DM. The curve of the DM derivatives with the specular reflection point position is obtained. Through comparing DM observablebased detection results with sea ice extent data analyzed by multisensory, the delay distance of the DM effective area, the peak of the correlation power, and the normalized mean square error can be used for sea ice edge detection. The method using GNSS-R is feasible to detect sea ice edge in spaceborne environment.

     

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