1、首先准备好一景S2_L1C的影像,将影像解压。解压最好选用“解压到当前文件夹”命令,这样可以直接获得“.SAFE”为后缀的文件夹,便于后续操作。 2、在“.SAFE”为后缀的文件夹存放路径下,“按住Shift单击右键-在此处打开命令窗口”打开命令行窗口,此时命令行的路径即为影像存储路径 3、输入命令“L2A_Process + 对...
L1C级的产品虽然已经完成了空间校正,但未经大气校正,需要用户自行进行大气校正;这是一个非常麻烦的过程,尤其对于大量遥感影像的处理很不友好。 而现在,Sentinel数据官网已经提供了L2A级遥感影像产品的下载,这一产品就是在前述L1C级产品的基础上,经过大气校正后获得的,免去了用户自行进行大气校正处理的流程。本文就对L2...
Sentinel -2A 卫星数据处理分析及在干旱河谷提取中的应用 · 131· 2.2 数据预处理 利用裁剪后的 L1C 级别数据,将其导入 SNAP 软件中,调用 SNAP 软件中 sen2cor 处理模块,选取 输出数据精度为 10 m,分别对研究区数据进行大气 下垫面发射率校正,卷云和地形校正处理,生成研究 区 L2A 级别数据及气溶胶光学厚度,...
Here we show that cirrus as well as opaque cloud cover in Sentinel-2 Level-1C (L1C) and Level-2A (L2A) imagery is systematically and significantly overestimated in very high altitude areas (e.g. Himalayas, Andes). We argue that this systematic bias is created by applying simple thresholds...
KappaMask: U-Net with two distinct settings:54all Sentinel-2 L1C bands and all Sentinel-2 L2A bands except the Red Edge 3 band. It was trained using both Sentinel-2 KappaZeta Cloud and Cloud Shadow Masks and the Sentinel-2 Cloud Mask Catalogue (see Table1). ...
The GEE data catalog provides a multi-petabyte collection of widely used satellite imagery, including the complete archives of S2 L1C TOA and L2A orthorectified atmospherically corrected surface reflectance data. On the processing side, the Python Application Programming Interface (API) package ee provid...
Microwave and optical imaging methods react differently to different land surface parameters and, thus, provide highly complementary information. However, the contribution of individual features from these two domains of the electromagnetic spectrum for
Level-1C (L1C) top of atmosphere (TOA) reflectance products for Sentinel-2 tiles capturing the legal Delta boundary (10SFH, 10SFG and 10SEH) were downloaded from the Copernicus Open Access Hub for each of the three match-up dates listed in Table 2. Products were atmospherically corrected t...
AZGh@qR|UyfQL70Ax%Ov1zYUlLg8 zO#c$(Yavzt8^LV_MC6_G+CN|>>51eM0RlXzVTtXZ{OW&}{QcAi(sxn|o#_4-hMt(| zP0IICwt$4RG-{BbU`#1gRNnv|6TeFPTwg@;wz!3t*R$X|I9lqzlz`ZiclLUhkNhK( zx2>T;qS%<`yl9Wh03#ag?2NbDq1v=qbj9;M{VD~L2a0OG0ToWZT|a)zbcIlDQ}<4H z2JRSZO1uyFc...
Two hundred iterations were done for each Sentinel-2 product (L1C, L2A, L2ADEM). Each treefall gap fraction area was evaluated from the unmixed results. A constant 0.7 threshold was applied for each image. The mean value of the area from iterations was considered during the evaluation. 3.8....