NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC)

Quarterly processing is complete for both the AMSR-E/Aqua Daily EASE-Grid Brightness Temperatures and AMSR-E/Aqua Daily Global Quarter-Degree Gridded Brightness Temperatures data sets.

NSIDC announces the release of Validated 12 (V12-Stage 1) AMSR-E Level-3 sea ice products.

NSIDC announces the release of a new data set containing Co-Registered AMSR-E, QuikSCAT, and WMO Data.

The DMSP SSM/I daily, polar gridded brightness temperatures now extend through 29 April 2009.

Quarterly processing is complete for both the AMSR-E/Aqua Daily EASE-Grid Brightness Temperatures and AMSR-E/Aqua Daily Global Quarter-Degree Gridded Brightness Temperatures data sets.

Processing of some SSM/I data is temporarily suspended due to the recent loss of the Defense Meteorological Satellite Program (DMSP) F-13 satellite.

The AMSR-E Science Investigator-led Processing System (SIPS) team re-initialized the multi-year sea ice mask on 05 October 2009 for Version 11 (V11) of the AMSR-E/Aqua Daily L3 12.5 km Brightness Temperatures, Sea Ice Concentration, and Snow Depth Polar Grids (AE_SI12) product. Re-initializing the multi-year sea ice mask will ensure that the

NSIDC has recently updated the Sea Ice Concentrations from Nimbus-7 SMMR and SSM/I DMSP Passive Microwave Data - Preliminary, and the Near-Real-Time DMSP SSM/I Daily Polar Gridded Sea Ice Concentrations.

Both the AMSR-E/Aqua Daily EASE-Grid Brightness Temperatures and AMSR-E/Aqua Daily Global Quarter-Degree Gridded Brightness Temperatures data sets have been updated.

NSIDC has adjusted the algorithm used in the Near-Real-Time SSM/I-SSMIS EASE-Grid Daily Global Ice Concentration and Snow Extent (NISE) Version 4 product.

NSIDC would like to report an error currently in two near-real-time data products: the Near-Real-Time DMSP SSM/I Daily Polar Gridded Brightness Temperatures and the Near-Real-Time DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures. A calibration problem in the F17 37H GHz channel is causing a bias of 3 to 4 Kelvin lower than should be reported for the 37H GHz channel.

As of 01 September 2009, the processing stream for the Near-Real-Time DMSP SSM/I-SSMIS Pathfinder Daily EASE-Grid Brightness Temperatures data set has been switched from the SSM/I sensor on board the Defense Meteorological Satellite Program (DMSP) F13 satellite to the SSMIS sensor on the DMSP-F17 satellite.

As of 28 August 2009, the processing stream for the Near-Real-Time Ice and Snow Extent (NISE) product has been switched from the SSM/I sensor on board the Defense Meteorological Satellite Program (DMSP) F13 satellite to the SSMIS sensor on the DMSP-F17 satellite.

All AMSR-E Level-3 Land, Sea Ice, and Snow data from 19 June 2002, the beginning of the AMSR-E mission, through the present now use the most up-to-date algorithm.

NSIDC is pleased to announce that reprocessing is complete for AMSR-E/Aqua L2A Global Swath Spatially-Resampled Brightness Temperatures (AE_L2A) and AMSR-E/Aqua Daily L2B Surface Soil Moisture, Interpretive Parms, and QC EASE-Grids (AE_Land) data products.

The AMSR-E/Aqua Daily EASE-Grid Brightness Temperatures and AMSR-E/Aqua Daily Global Quarter-Degree Gridded Brightness Temperatures data sets have
been updated.

On 17 July 2009, the MODIS/Terra Snow Cover Daily L3 Global 500m Grid (MOD10A1) Version 4 (V004) snow data product will be removed from NSIDC's archive.

NSIDC is pleased to announce the release of Validated 11 (V11-Stage 1) AMSR-E Level-3 sea ice products as of 29 May 2009. The algorithm for V11 corrected an error introduced in the V10 algorithm which caused the snow depth on sea ice parameter to be overestimated by a factor of approximately two.

NSIDC has officially switched its processing stream for near-real-time passive microwave brightness temperatures from the SSM/I sensor on board the Defense Meteorological Satellite Program (DMSP) F13 satellite to the SSMIS sensor on the DMSP-F17 satellite. This change in the processing stream was necessary due to a failing recorder on F13.

Version 4 MODIS snow and sea ice data products have been removed from NSIDC's archive. NSIDC will retain a small amount of MODIS Version 4 data from each data set for use in comparisons with other data versions. This is referred to as a golden month.