MODIS/Aqua Snow Cover 8-Day L3 Global 500m Grid (MYD10A2) contains data fields for maximum snow cover extent over an eight-day compositing period and a chronology of snow occurrence observations in HDF-EOS format, along with corresponding metadata. MYD10A2 consists of 1200 km by 1200 km tiles of 500 m resolution data gridded in a sinusoidal map projection. 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 3 (V003) is the Golden Month, which is a sample of V003 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.