MODIS/Terra Snow Cover Daily L3 Global 500m SIN Grid, Version 5

The MODIS/Terra Snow Cover Daily L3 Global 500m Grid (MOD10A1) contains snow cover, snow albedo, fractional snow cover, and Quality Assessment (QA) data in compressed Hierarchical Data Format-Earth Observing System (HDF-EOS) format along with corresponding metadata. MOD10A1 consists of 1200 km by 1200 km tiles of 500 m resolution data gridded in a sinusoidal map projection. The Moderate Resolution Imaging Spectroradiometer (MODIS) snow cover data are based on a snow mapping algorithm that employs a Normalized Difference Snow Index (NDSI) and other criteria tests.MODIS/Terra积雪每日三级全球500米网格产品（MOD10A1）包含积雪覆盖、积雪反照率、积雪覆盖率及质量评估（Quality Assessment，QA）数据，以压缩型地球观测系统分层数据格式（Hierarchical Data Format-Earth Observing System，HDF-EOS）存储，并附带对应元数据。MOD10A1由采用正弦地图投影网格化的、分辨率为500米、尺寸为1200千米×1200千米的瓦片数据构成。中分辨率成像光谱仪（Moderate Resolution Imaging Spectroradiometer，MODIS）积雪覆盖数据基于集成了归一化积雪指数（Normalized Difference Snow Index，NDSI）及其他判据测试的积雪制图算法生成。