Landsat Fractional Snow Covered Area Product是一套30米的雪比例产品（含云掩膜）
、
该产品包括2部分。一是雪比例产品fSCA，产品文件说明
LXSS_US_HHHVVV_YYYYMMDD_yyyymmdd_CCC_VVV_PACKAGE.tar
(e.g., LE07_CU_003011_200008285_20170918_C01_V01_SNOW.tar)
L Landsat
X Sensor (“C” = OLI/TIRS, “E” = ETM+, “T” = TM)
SS Satellite (“08” = Landsat 8, “07” = Landsat 7, “05” = Landsat 5, “04” = Landsat 4)
US Regional grid of the U.S. (“CU” = CONUS, “AK” = Alaska)
HHH Horizontal tile number
VVV Vertical tile number
YYYY Acquisition year
MM Acquisition month
DD Acquisition day
yyyy ARD tile Production year
mm ARD tile Production month
dd ARD tile Production day
CCC Level 1 Collection number (“C01”, “C02”, etc.)
VVV Analysis Ready Data (ARD) Version number (“V01”, “V02”, etc.)
PACKAGE Data package (“SNOW” = Fractional Snow Covered Area package)产品内容是云比例，缩放因子0.001。
二是云掩膜产品REVCM，产品文件说明
LXSS_US_HHHVVV_YYYYMMDD_yyyymmdd_CCC_VVV_PRODUCT.ext
(e.g., LE07_CU_003011_200008285_20170918_C01_V01_REVCM.tif)
L Landsat
X Sensor (“C” = OLI/TIRS, “E” = ETM+, “T” = TM)
SS Satellite (“08” = Landsat 8, “07” = Landsat 7, “05” = Landsat 5, “04” = Landsat 4)
US Regional grid of the U.S. (“CU” = CONUS, “AK” = Alaska)
HHH Horizontal tile number
VVV Vertical tile number
YYYY Acquisition year
MM Acquisition month
DD Acquisition day
yyyy ARD tile Production year
mm ARD tile Production month
dd ARD tile Production day
CCC Level 1 Collection number (“C01”, “C02”)
VVV Analysis Ready Data (ARD) Version number (“V01”, “V02”)
PRODUCT Data product (“SNOW” = Fractional Snow Covered Area, “REVCM” = Revised Cloud Mask)
ext File extension (“.tif” = GeoTIFF, “.xml” = Extensible Markup Language)产品内容说明
数据下载，使用EarthExplorer，在 Landsat 类别下, Landsat Collection 1 Level-3 子类, 选择 Fractional Snow Covered Area.
但该产品仅覆盖美西和阿拉斯加地区。
该产品用户手册链接
该产品覆盖区域链接