MODIS Vegetation Index Products

MODIS植被指数产品(NDVI和EVI)是由NASA提供的全球植被监测数据集，包含归一化植被指数(NDVI)和增强型植被指数(EVI)。该产品以16天为周期生成，提供250米至1公里不等的多种空间分辨率数据，用于表征植被冠层绿色度，是生态系统、气候和自然资源管理研究的重要数据源。产品基于Terra和Aqua卫星获取的大气校正反射率数据，采用特定合成方法生成高质量时间序列数据。The MODIS Vegetation Index Products (NDVI and EVI) are global vegetation monitoring datasets provided by NASA, which include the Normalized Difference Vegetation Index (NDVI) and the Enhanced Vegetation Index (EVI). Generated on a 16-day cycle, these products offer multiple spatial resolution datasets ranging from 250 meters to 1 kilometer, used to characterize the greenness of vegetation canopies and serving as critical data sources for research in ecosystems, climate and natural resource management. These products are generated based on atmospherically corrected reflectance data acquired by the Terra and Aqua satellites, with specific synthesis methods applied to produce high-quality time-series datasets.