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Description

This data set contains daily, gridded snow cover and albedo derived from radiance data acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) on board the Aqua satellite. Snow cover is identified using the Normalized Difference Snow Index (NDSI) and a series of screens designed to alleviate errors and flag uncertain snow cover detections.

As of August 2023, this data set is retired and no longer available for download. We recommend using <a href="https://nsidc.org/data/myd10a1/versions/61">MODIS/Aqua Snow Cover Daily L3 Global 500m SIN Grid, Version 61</a> as an alternative.

Version Description

Changes for Version 6 include:
  • Fractional Snow Cover has been replaced by Normalized Difference Snow Index (NDSI) snow cover. Fractional Snow Cover is no longer calculated;
  • The binary Snow-Covered Area (SCA) map has been discontinued;
  • Aqua MODIS band 6 data have been restored to scientific quality using a Quantitative Image Restoration (QIR) technique. Aqua now uses the same snow detection algorithm as Terra;
  • Existing data screens designed to reduce snow detection errors have been revised and several new screens have been added;
  • Data screen results, including snow detection reversals and detections with increased uncertainty, are provided in a new QA bit flag;
  • Basic pixel-level QA uses new criteria to indicate the overall quality of algorithm result;
  • Pointers are provided to locate the swaths used for each day's observation.

Product Summary

Platforms
Aqua
Instruments
MODIS
Spatial Extent

N: 90 S: -90 E: 180 W: -180

Spatial Resolution
500 Meters x 500 Meters
Location
GLOBAL
Coordinate System
CARTESIAN
Granule Spatial Representation
GEODETIC
Temporal Extent
2002-07-04 to 2023-02-25
Temporal Resolution
1 Day
Concept ID
C3091255765-NSIDC_CPRD
Data State
DEPRECATED
Number of Files/Granules
0
Processing Level
3
Published
Science Keywords
Albedo ,
Albedo ,
Snow Cover

Citation

Citation is critically important for dataset documentation and discovery. This dataset is openly shared, without restriction, in accordance with the EOSDIS Data Use and Citation Guidance.

Copy Citation

Hall, D. K., & Riggs, G. A. (2015). MODIS/Aqua Snow Cover Daily L3 Global 500m SIN Grid, Version 6 [Dataset]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MYD10A1.006 Date Accessed: 2026-06-17

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