• On 16 April 2025, the “Order Files” option of NSIDC DAAC’s Data Access Tool was 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 herehttp://nasa.github.io/earthdata-download/.
    Additionally, the “Order History” page (http://nsidc.org/order-history) will also be removed two weeks after this update, on 30 April 2025.

Data Access Tool

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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:
NSIDC-0477
Data Set Summary:
This data set, part of the NASA Making Earth System Data Records for Use in Research Environments (MEaSUREs) program, contains a global record of the daily freeze/thaw status of the landscape. The record is derived from radiometric brightness temperatures acquired between 1979 and 2021 by four satellite-based, passive microwave sensors: the Scanning Multichannel Microwave Radiometer (SMMR), the Special Sensor Microwave/Imager (SSM/I), the Special Sensor Microwave Imager/Sounder (SSMIS), and the Advanced Microwave Scanning Radiometer 2 (AMSR2).