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MODIS/Terra Snow Cover 8-Day L3 Global 500m ISIN Grid V001
Entry ID: MOD10A21

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Abstract: Snow cover products from the Moderate Resolution Imaging Spectroradiometer
(MODIS) include level 2 swath data and level 3 gridded daily and eight-day
composites, at 500 m resolution. A snow mapping algorithm, based on the
Normalized Difference Snow Index (NDSI) and other criteria tests, is used to
process MODIS data.

The eight day level 3 product (MOD10A21) contains fields for maximum
snow cover extent over an eight day compositing period, and a
chronology of snow occurrence observations. This 500 m product
consists of 1200 km by 1200 km tiles of data gridded in an integerized
sinusoidal map projection. Snow cover data and supporting attributes
are in HDF-EOS format, and are available by ftp.
Related URL
Description: MODIS Snow and Ice Products at NSIDC DAAC Page
Geographic Coverage
Spatial coordinates   
  N: 90.0   S: -90.0   E: 180.0   W: -180.0

Data Set Citation
Dataset Originator/Creator: G. Riggs, D. Hall, V. Salomonson
Dataset Title: MODIS/Terra Snow Cover 8-Day L3 Global 500m ISIN Grid V001
Dataset Release Date: 2000
Dataset Release Place: Boulder, CO U.S.A.
Dataset Publisher: National Snow and Ice Data Center (NSIDC)
Online Resource:
Temporal Coverage
Start Date: 2000-09-13
Data Resolution
Latitude Resolution: 500 m
Longitude Resolution: 500 m
Temporal Resolution: 8-Day
Data Set Progress
Originating Center
Data Center
NASA National Snow and Ice Data Center Distributed Active Archive Center Supplemental Info
Data Center URL:
Dataset ID: MOD10A21

Data Center Personnel
Phone: +1 (303) 492-6199
Fax: +1 (303) 492-2468
Email: nsidc at
Contact Address:
National Snow and Ice Data Center
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
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Distribution Media: ftp
Distribution Size: 11.6 MB
Distribution Format: HDF-EOS
Fees: unknown
Contact Address:
National Aeronautics and Space Administration (NASA) Goddard Space Flight Center (GSFC)
Mail stop 614.1
City: Greenbelt
Province or State: MD
Postal Code: 20771
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EOS Ground System (EGS) Systems and Operations Concept. 1996. Earth Science
Data and Information System (ESDIS), Goddard Space Flight Center, National
Aeronautics and Space Administration.

Hall, D.K., A.B. Tait, G.A. Riggs, and V.V. Salomonson. 1998.
Algorithm Theoretical Basis Document (ATBD) for the MODIS Snow-, Lake
Ice- and Sea Ice-Mapping Algorithms (Version 4.0). Electronic version
is ... View entire text
Extended Metadata Properties
(Click to view more)

Creation and Review Dates
DIF Creation Date: 1999-11-18
Last DIF Revision Date: 2004-06-03
Future DIF Review Date: 2002-01-03

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