Global Seasonal Sentinel-1 Interferometric Coherence and Backscatter Dataset

This dataset is the first-of-its-kind spatial representation of multi-seasonal, global SAR repeat-pass interferometric coherence and backscatter signatures. Global coverage comprises all land masses and ice sheets from 82 degrees northern to 78 degrees southern latitude. The dataset is derived from high-resolution multi-temporal repeat-pass interferometric processing of about 205,000 Sentinel-1 Single-Look-Complex (SLC) data acquired in Interferometric Wide-Swath mode (Sentinel-1 IW mode) from 1-Dec-2019 to 30-Nov-2020. The dataset was developed by Earth Big Data LLC and Gamma Remote Sensing AG, under contract for NASA’s Jet Propulsion Laboratory. The dataset covers seasonal (DJF/MAM/JJA/SON) metrics of: Median 6-, 12-, 18-, 24-, 36-, and 48-day repeat coherence estimates for C-band VV and HH polarized dataMean backscatter (γº) for VV, VH, HH, and HV polarizationsSeasonal coherence decay model parameters rho, tau, and rmseLocal incidence and layover/shadow regions for all relative Sentinel-1A and Sentinel-1B orbits. Note that in the dataset filenames seasons were referred to as northern hemisphere winter (DJF), spring (MAM), summer (JJA), and fall (SON). ResourcesFor information on how to access and use the Coherence and Backscatter Dataset Image Services available from ASF, view the StoryMap tutorial:  Sentinel-1 Interferometric Coherence Image Services“Enhancing access to the Global Seasonal Sentinel-1 Interferometric Coherence and Backscatter Dataset with Image Services” More information about Sentinel-1 at ASF SAR DAACSearch and download Sentinel-1 data  Work with Sentinel-1 data

本数据集为首创性的多季节全球合成孔径雷达（SAR）重复过顶干涉相干性和后向散射特征的空间表征。其全球覆盖范围包括从北纬82度至南纬78度的所有陆地和冰盖。该数据集通过约205,000条Sentinel-1单视复数（SLC）数据的高分辨率多时相重复过顶干涉处理所得，这些数据在2019年12月1日至2020年11月30日期间以干涉宽波束模式（Sentinel-1 IW模式）获取。数据集由Earth Big Data LLC公司和Gamma Remote Sensing AG开发，承建于NASA喷气推进实验室的合同之下。该数据集涵盖了以下季节性（DJF/MAM/JJA/SON）指标：C波段VV和HH极化数据的6天、12天、18天、24天、36天和48天重复相干估计的中位数均值后向散射（γº）对于VV、VH、HH和HV极化季节相干衰减模型参数ρ、τ和rmse所有相对Sentinel-1A和Sentinel-1B轨道的局部入射和覆盖/阴影区域。请注意，在数据集中，季节以北半球冬季（DJF）、春季（MAM）、夏季（JJA）和秋季（SON）命名。资源：关于如何访问和使用ASF提供的相干性和后向散射数据集图像服务的信息，请查看StoryMap教程：“通过图像服务增强全球季节性Sentinel-1干涉相干性和后向散射数据集的访问”，“关于Sentinel-1在ASF SAR DAAC的更多信息”，搜索和下载Sentinel-1数据，以及与Sentinel-1数据协同工作。