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Description
This global Level-2 (L2) product provides daily sea ice extent and ice surface temperature. The data are derived from Level-1B radiances acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) on board the Terra satellite. Each data granule contains 5 minutes of swath data observed at a resolution of 1000 m.
The terms "Version 61" and "Collection 6.1" are used interchangeably in reference to this release of MODIS data.
Version Description
The C61 science algorithm is the same as the C6 algorithm. Any improvement to the C61 product compared to the C6 product comes from enhancements to the calibration approach used to generate the input products and from updates to the polarization correction used in C61 reprocessing.
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.
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Hall, D., & Riggs, G. (2021). MODIS/Terra Sea Ice Extent 5-Min L2 Swath 1km, Version 61 [Data set]. NASA National Snow and Ice Data Center Distributed Active Archive Center. https://doi.org/10.5067/MODIS/MOD29.061 Date Accessed: 2026-05-02
Hall, Dorothy, and George Riggs. “MODIS/Terra Sea Ice Extent 5-Min L2 Swath 1km, Version 61.” NASA National Snow and Ice Data Center Distributed Active Archive Center, 2021. doi:10.5067/MODIS/MOD29.061. Date Accessed: 2026-05-02
Hall, Dorothy, and George Riggs. MODIS/Terra Sea Ice Extent 5-Min L2 Swath 1km, Version 61. NASA National Snow and Ice Data Center Distributed Active Archive Center, 2021, doi:10.5067/MODIS/MOD29.061. Date Accessed: 2026-05-02