MODIS/Aqua Snow Cover Daily L3 Global 0.05Deg CMG, Version 4

MODIS/Aqua Snow Cover Daily L3 Global 0.05Deg CMG (MYD10C1) consists of 7200-column by 3600-row global arrays of snow cover in a 0.05 deg climate modeling grid (CMG). Data and quality assurance (QA) fields are in HDF-EOS format, along with corresponding metadata. Data extend from 04 July 2002 to present. MODIS snow cover data are based on a snow mapping algorithm that employs a Normalized Difference Snow Index (NDSI) and other criteria tests. The only data available for Version 4 (V004) is the Golden Month, which is a sample of V004 data covering the time period 29 August 2002 (day of year 241) through 7 October 2002 (day of year 280). The Golden Month is only available by special request by contacting NSIDC User Services.

Please note that NSIDC now has a complete series of Version 5 data, which is the highest version number now available and represents the best quality of data.

MODIS/Aqua每日积雪全球L3级0.05°气候建模格网（CMG）产品（MYD10C1）包含基于0.05°气候建模格网（Climate Modeling Grid，CMG）构建的7200列×3600行全球积雪阵列。数据与质量保证（Quality Assurance，QA）字段均采用HDF-EOS格式存储，并附带相应元数据。数据集的时间跨度为2002年7月4日至今。MODIS积雪数据基于积雪制图算法构建，该算法采用归一化积雪指数（Normalized Difference Snow Index，NDSI）及其他判别准则完成积雪识别。第4版（V004）仅提供“黄金月”数据集，该样本数据的时间范围为2002年8月29日（年积日241）至2002年10月7日（年积日280）。该“黄金月”数据集仅可通过联系国家冰雪数据中心（NSIDC）用户服务中心提出特殊申请获取。
请注意，国家冰雪数据中心（NSIDC）现已提供完整的第5版（V005）数据序列，该版本为当前可用的最高版本，也是数据质量最优的数据集。