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Normalized-Difference Snow Index (NDSI)The Normalized-Difference Snow Index (NDSI) has a long history. 'The use of ratioing visible (VIS) and near-infrared (NIR) or short-wave infrared (SWIR) channels to separate snow and clouds was documented in the literature beginning in the mid-1970s. A considerable amount of work on this subject was conducted at, and published by, the Air Force Geophysics Laboratory (AFGL). The objective of the AFGL work was to discriminate snow cover from cloud cover using an automated algorithm to improve global cloud analyses. Later, automated methods that relied on the VIS/NIR ratio were refined substantially using satellite data In this section we provide a brief history of the use of the NDSI for mapping snow cover.
Document ID
Acquisition Source
Goddard Space Flight Center
Document Type
Book Chapter
Hall, Dorothy K.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Riggs, George A.
(Science Systems and Applications, Inc. Lanham, MD, United States)
Date Acquired
August 25, 2013
Publication Date
May 6, 2010
Publication Information
Publication: Encyclopedia of Snow, Ice and Glaciers
Subject Category
Meteorology And Climatology
Distribution Limits
Public Use Permitted.
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