HLS Landsat Operational Land Imager Surface Reflectance and TOA Brightness Daily Global 30m v2.0

The Harmonized Landsat Sentinel-2 (HLS) project provides consistent surface reflectance (SR) and top of atmosphere (TOA) brightness data from a virtual constellation of satellite sensors. The Operational Land Imager (OLI) is housed aboard the joint NASA/USGS Landsat 8 and Landsat 9 satellites, while the Multi-Spectral Instrument (MSI) is mounted aboard Europe’s Copernicus Sentinel-2A, Sentinel-2B, and Sentinel-2C satellites. The combined measurement enables global observations of the land every 2–3 days at 30-meter (m) spatial resolution. The HLS project uses a set of algorithms to obtain seamless products from OLI and MSI that include atmospheric correction, cloud and cloud-shadow masking, spatial co-registration and common gridding, illumination and view angle normalization...统一Landsat与Sentinel-2数据集（Harmonized Landsat Sentinel-2, HLS）项目可提供来自虚拟卫星传感器星座的一致性地表反射率（surface reflectance, SR）与大气层顶（top of atmosphere, TOA）辐射亮度数据。陆地成像仪（Operational Land Imager, OLI）搭载于NASA与USGS联合运营的Landsat 8及Landsat 9卫星之上；多光谱仪器（Multi-Spectral Instrument, MSI）则安装在欧洲哥白尼计划的Sentinel-2A、Sentinel-2B及Sentinel-2C卫星上。该组合观测方案可实现每2至3天一次的全球陆地观测，空间分辨率达30米。HLS项目通过一系列算法对OLI与MSI的观测数据进行处理，生成无缝衔接的遥感产品，处理流程涵盖大气校正、云与云阴影掩膜、空间配准与统一网格化、光照与视角归一化等环节。