ASTER Global Emissivity Dataset 100-meter V003 - AG100

The Advanced Spaceborne Thermal Emission and Reflection radiometer Global Emissivity Database (ASTER GED) was developed by the National Aeronautics and Space Administration's (NASA) Jet Propulsion Laboratory (JPL), California Institute of Technology. The North America portion of this collection was formerly called the North American ASTER Land Surface Emissivity Database (NAALSED) - a seasonal dataset consisting of mean summer (J-A-S) and winter (J-F-M) products.

ASTER GED products are output on 1degree x 1 degree grids at 100-meter or 1-kilometer spatial resolution (nominal) and include the mean emissivity and standard deviation for all 5 ASTER thermal infrared bands, mean land surface temperature (LST) and standard deviation, a re-sampled ASTER GDEM (not included in the North America Winter products), land-water mask, mean Normalized Difference Vegetation Index (NDVI) and standard deviation, latitude, longitude, and observation count.

Additional ASTER GED product information is available at https://lpdaac.usgs.gov/products/community_products_table. Product tiles are available in HDF and binary format and may be downloaded via HTTP by visiting the following data clients: NASA Reverb (http://reverb.echo.nasa.gov), LP DAAC Data Pool (http://e4ftl01.cr.usgs.gov/ASTT/), or EarthExplorer (http://earthexplorer.usgs.gov).

先进星载热发射和反射辐射计全球发射率数据库（Advanced Spaceborne Thermal Emission and Reflection radiometer Global Emissivity Database，ASTER GED）由美国国家航空航天局（National Aeronautics and Space Administration，NASA）下属加州理工学院的喷气推进实验室（Jet Propulsion Laboratory，JPL）开发。该数据集的北美区域部分此前曾被称为北美ASTER地表发射率数据库（North American ASTER Land Surface Emissivity Database，NAALSED），这是一套季节性数据集，包含夏季（J-A-S）与冬季（J-F-M）的均值产品。

ASTER GED产品以1°×1°网格输出，标称空间分辨率为100米或1千米，涵盖以下数据：全部5个ASTER热红外波段的平均发射率及其标准差、平均地表温度（Land Surface Temperature，LST）及其标准差、重采样后的ASTER全球数字高程模型（ASTER GDEM，北美冬季产品未包含此项）、水陆掩膜、归一化差异植被指数（Normalized Difference Vegetation Index，NDVI）平均值及其标准差、纬度、经度以及观测次数。

更多ASTER GED产品相关信息可访问https://lpdaac.usgs.gov/products/community_products_table。产品分幅数据以HDF和二进制格式提供，可通过以下数据客户端以HTTP协议下载：NASA Reverb（http://reverb.echo.nasa.gov）、LP DAAC数据池（http://e4ftl01.cr.usgs.gov/ASTT/）以及EarthExplorer（http://earthexplorer.usgs.gov）。