| 基于CYGNSS数据的星载GNSS-R水体分布探测方法研究 |
| |
| 引用本文： | 汪俊涛,朱勇超,高飞,李江洋,陶庭叶.基于CYGNSS数据的星载GNSS-R水体分布探测方法研究[J].大地测量与地球动力学,2021,41(8):777-782. |
| |
| 作者姓名： | 汪俊涛 朱勇超 高飞 李江洋 陶庭叶 |
| |
| 作者单位： | 合肥工业大学土木与水利工程学院,合肥市屯溪路193号,230009;合肥工业大学土木与水利工程学院,合肥市屯溪路193号,230009;东华理工大学江西省数字国土重点实验室,南昌市广兰大道418号,330013;武汉大学地球空间环境与大地测量教育部重点实验室,武汉市珞喻路129号,430079;武汉大学测绘遥感信息工程国家重点实验室,武汉市珞喻路129号,430079 |
| |
| 摘 要： | 利用CYGNSS（cyclone global navigation satellite system）采集的GNSS卫星反射信号，提出一种基于星载GNSS-R的水体分布探测方法。首先对CYGNSS低轨卫星星座采集的GNSS反射信号进行处理，获取地表反射率数据；再按0.01°×0.01°的空间分辨率将研究区划分为格网，剔除异常值和无效值后，利用区域均值算法重新计算各格网的反射率，并利用格网样本方差和标准差作为衡量指标，采用随机游走图像分割算法进行水体分布探测；最后利用本文提出的方法分析刚果盆地的水体分布情况，并利用MODIS数据对结果进行评估。结果表明，星载GNSS-R具有较强的水体分布探测能力，进一步拓展了GNSS-R的应用场景。
|
| 关 键 词： | CYGNSS 地表反射率 水体探测 星载GNSS-R 时延多普勒图 |
Research on Detection Method of Water Distribution of Spaceborne GNSS-R Based on CYGNSS Data |
| |
| WANG Juntao,ZHU Yongchao,GAO Fei,LI Jiangyang,TAO Tingye.Research on Detection Method of Water Distribution of Spaceborne GNSS-R Based on CYGNSS Data[J].Journal of Geodesy and Geodynamics,2021,41(8):777-782. |
| |
| Authors: | WANG Juntao ZHU Yongchao GAO Fei LI Jiangyang TAO Tingye |
| |
| Abstract: | We propose a new water distribution detection method based on spaceborne GNSS-R using reflected GNSS signals collected by CYGNSS (cyclone global navigation satellite system). First, we process the reflected GNSS signals collected by CYGNSS constellation to obtain the surface reflectance data. Then, the study area is divided into grids according to the spatial resolution of 0.01°×0.01°. After eliminating outliers and invalid values, the reflectivity of each grid is recalculated using the region average algorithm. We use the grid sample variance and standard deviation as measurement indexes. The random walker segmentation algorithm is used to detect water distribution. Finally, the distribution of water in Congo basin is analyzed using the proposed method, and the results of this paper are evaluated with MODIS data. The results show the great potential of spaceborne GNSS-R for detecting water distribution, further expanding the applications of GNSS-R. |
| |
| Keywords: | CYGNSS surface reflectance water detection spaceborne GNSS-R delay-Doppler map |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《大地测量与地球动力学》浏览原始摘要信息 |
| 点击此处可从《大地测量与地球动力学》下载免费的PDF全文 |
