• In mid-April 2025, the “Order Files” option of NSIDC DAAC’s Data Access Tool will be retired and replaced with Earthdata Download. Earthdata Download is a native desktop application that enables efficient direct download for orders of any size. To use this new download option, you must install the new version release of Earthdata Download (v1.0.4) available herehttps://nasa.github.io/earthdata-download/.
    Additionally, the “Order History” page (https://nsidc.org/order-history) will also be removed two weeks after this update, at the end of April 2025.

Data Access Tool

Use the selectors below to search and filter by time range and/or geographic area

Selected Data Set Information

Note: To select a different data set, close this window (or tab) and navigate to the data set landing page you want.

Data Set ID:
AU_SI25
Data Set Summary:
This data set reports average daily horizontally and vertically polarized brightness temperatures and sea ice concentrations on 25 km resolution north and south polar stereographic grids. The data are derived from observations acquired by the Advanced Microwave Scanning Radiometer (AMSR) for EOS (AMSR-E) and AMSR2 instruments that have been spatially resampled by the Japan Aerospace Exploration Agency (JAXA) to unify the AMSR-E and AMSR2 missions. Brightness temperatures are available at 6.9 GHz, 10.7 GHz, 18.7 GHz, 23.8 GHz, 36.5 GHz and 89.0 GHz for ascending and descending orbits, and as a single daily average. Sea ice concentrations are generated with the Enhanced NASA Team (NT2) algorithm; a separate variable reports the daily sea ice concentration difference between the legacy AMSR Basic Bootstrap Algorithm (ABA) and the NT2.

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Note: Blue-green overlay shows the dataset coverage, unless it is global.
Data provided by:
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    CesiumNSIDC Data Access UI v2.0.0
    files selected (~0 MB)
    '*' match multiple characters; '?' match one character; ',' combine queries; Example: *2019??01*,*2020??01*
    File Name
    Size (MB)
    Start Time
    End Time
    files selected (~0 MB)
    Download Python script (requires Python 2 or 3).
    Once processed, your Orders page will display one or more zip files and a list of file URLs.
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    Orders >2000 files will be fulfilled via Earthdata Search. Also use this option to apply customizations (e.g. subset, reformat). Your current order will be transferred intact for completion.