VIIRS/NPP Snow Cover Daily L3 Global 375m SIN Grid, Version 1

This data set contains daily snow cover derived from radiance data acquired by the Visible Infrared Imaging Radiometer Suite (VIIRS) on board the Suomi National Polar-orbiting Partnership (NPP) satellite. The data is a gridded composite, generated from 6 minute swaths, and projected to a 375 m Sinusoidal grid. Snow cover is identified using the Normalized Difference Snow Index (NDSI) and a series of screens designed to alleviate errors and flag uncertain snow cover detections.本数据集包含由搭载于苏奥米国家极轨伙伴卫星（Suomi National Polar-orbiting Partnership，NPP）的可见光红外成像辐射仪套件（Visible Infrared Imaging Radiometer Suite，VIIRS）获取的辐射数据反演得到的每日积雪覆盖范围数据。该数据为网格化合成产品，由6分钟幅宽的观测数据生成，并投影至375米分辨率的正弦投影网格。积雪覆盖范围通过归一化积雪指数（Normalized Difference Snow Index，NDSI）以及一系列旨在减少误差、标记不确定积雪识别结果的筛选流程进行判定。