Data set updates: AMSR-E/AMSR2 Unified L3 Daily Brightness Temperatures and Sea Ice Polar Gridded Data

The AMSR-E/AMSR2 Unified L3 Daily 6.25 km Polar Gridded 89 GHz Brightness Temperatures, Version 1, the AMSR-E/AMSR2 Unified L3 Daily 12.5 km Brightness Temperatures, Sea Ice Concentration, Motion & Snow Depth Polar Grids, Version 1, and the AMSR-E/AMSR2 Unified L3 Daily 25 km Brightness Temperatures & Sea Ice Concentration Polar Grids, Version 1 data sets, available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC), have been updated. This update includes the addition of the AMSR-E derived data, with each product now covering the temporal range of June 2002 - present (with a gap in data from October 2011 - July 2012, between the end of the AMSR-E mission and the beginning of AMSR2).
Additionally, the pre-existing AMSR2 data for each product has been reprocessed to address some minor issues with the file metadata. This change may impact users of the 12.5 km product that use certain tools (e.g., Panoply) to plot variables located in the root of the file. For more information on these updates, please visit the AMSR Unified Version History page: https://nsidc.org/data/amsru/version-history

These data sets contain average daily horizontally and vertically polarized brightness temperatures, sea ice concentrations, and snow depths over sea ice on 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.

The NSIDC DAAC provides access to documentation and data from the following locations:

AMSR-E/AMSR2 Unified L3 Daily 6.25 km Polar Gridded 89 GHz Brightness Temperatures, Version 1
Data set DOI: https://doi.org/10.5067/NX1R09ORNOZN

AMSR-E/AMSR2 Unified L3 Daily 12.5 km Brightness Temperatures, Sea Ice Concentration, Motion & Snow Depth Polar Grids, Version 1
Data set DOI: https://doi.org/10.5067/RA1MIJOYPK3P

AMSR-E/AMSR2 Unified L3 Daily 25 km Brightness Temperatures & Sea Ice Concentration Polar Grids, Version 1
Data set DOI: https://doi.org/10.5067/TRUIAL3WPAUP