Data Announcements

Reprocessing Complete for AMSR-E/Aqua L2B Global Swath Surface Precipitation GSFC Profiling Algorithm, Version 3

3 February 2016

The AMSR-E Science Investigator-led Processing System (SIPS) has completed reprocessing of the “AMSR-E/Aqua L2B Global Swath Surface Precipitation GSFC Profiling Algorithm” data set to Version 3. Both Version 2 and 3 data are available for six months, after which, Version 2 will be discontinued.

For more information access to the data, refer to the AMSR-E Web site.

AMSR-E Updates L2B Rain Product

20 November 2015

The AMSR-E Science Investigator-led Processing System (SIPS) has updated the AMSR-E L2B rain data  set, AMSR-E/Aqua L2B Global Swath Surface Precipitation GSFC Profiling Algorithm, to Version 3.

Version 3 utilizes the GPROF 2010 Version 2 algorithm and Version 3 Level-2A Brightness Temperatures as input. Version 3 now includes both rain and solid precipitation rates and types, as well as ISO lineage metadata.

Reprocessing from the beginning of the mission onward is currently underway for these data sets and you will be notified when reprocessing is complete. Further details and data access are available at http://nsidc.org/data/amsre/index.html. If you have any questions, please contact NSIDC User Services at nsidc@nsidc.org.

Version 2 AMSR-E Sea Ice data unavailable after 16 February 2015 from the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC)

10 February 2015

Version 2 of the AMSR-E Sea Ice data sets will only be available from NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) until 16 February 2015 through the Data Pool or Reverb.

  • AMSR-E/Aqua Daily L3 6.25 km 89 GHz Brightness Temperature Polar Grids
  • AMSR-E/Aqua Daily L3 12.5 km Brightness Temperatures, Sea Ice Concentration, & Snow Depth Polar Grids
  • AMSR-E/Aqua Daily L3 25 km Brightness Temperatures & Sea Ice Concentration Polar Grids

 

For Version 3 AMSR-E Sea Ice data, go to the AMSR-E Data Sets Web page. If you have any questions, please contact NSIDC User Services Office.

Reprocessing Complete for Version 3 AMSR-E Sea Ice Data at NSIDC DAAC

2 September 2014

The AMSR-E Science Investigator-led Processing System (SIPS) has completed reprocessing of the AMSR-E sea ice data sets to Version 3. The following data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

Changes to the Version 3 algorithm for these data include:

  • Use of the most recent version (Version 3) of the “AMSR-E/Aqua L2A Global Swath Spatially-Resampled Brightness Temperatures” data as input
  • An improved Antarctic land mask
  • Inclusion of ISO lineage metadata

The new Antarctic land mask includes an updated ice shelf definition, created by the National Ice Center Science Department in June 2011, as well as an updated shoreline developed from ENVISAT and RADARSAT imagery from October 2009 to April 2010. Also, due to inconsistencies between surface type classifications determined from a land flag in the input L2A data and surface type classifications determined from the updated land mask, this updated Version no longer uses the L2A land flag and thus only uses the updated land mask for surface type classification in the southern hemisphere sea ice concentration algorithm.

For further details and data access, please see the AMSR-E Web site at the NSIDC DAAC ( http://nsidc.org/data/amsre/index.html).

Data Acknowledgements
Data authors: D. J. Cavalieri, T. Markus, J. C. Comiso
Data center: NSIDC DAAC ( http://earthdata.nasa.gov )
Sponsor: NASA EOSDIS ( http://earthdata.nasa.gov )

If you have any questions, please contact the User Services Office at nsidc@nsidc.org

AMSR-E Updates Sea Ice Products

2 July 2014

The AMSR-E Science Investigator-led Processing System (SIPS) has updated the following AMSR-E sea ice data sets to Version 3:

Changes to the Version 3 algorithm for these data include:

  • Uses Version 3 of the AMSR-E/Aqua L2A Global Swath Spatially-Resampled Brightness Temperatures data as input
  • Improved Antarctic land mask: Includes an updated ice shelf definition created by the National Ice Center Science Department in June 2011, and an updated shoreline developed from ENVISAT and RADARSAT imagery from October 2009 to April 2010. Also, this updated version no longer uses the L-2A land flag and only uses the updated land mask for surface type classification in the southern hemisphere sea ice concentration algorithm.
  • Inclusion of ISO lineage metadata

Reprocessing from the beginning of the mission onward is currently underway for these data sets and you will be notified when reprocessing is complete. Further details and data access are available at http://nsidc.org/data/amsre/index.html. If you have any questions, please contact NSIDC User Services at nsidc@nsidc.org.

NSIDC Web Site and FTP Server Down for System Maintenance

29 May 2014

From 4:30 p.m. Wednesday, June 04 until noon Friday, June 06  (USA Mountain Time), our Web site and FTP server will be unavailable due to system maintenance. We apologize for any inconvenience this may cause you.

Beginning 10 Feb. 2014, AMSR-E/Aqua L2A Global Swath Spatially-Resampled Brightness Temperatures Version 2 No Longer Available

4 February 2014

Beginning 10 Feb. 2014, Version 2  AMSR-E/Aqua L2A Global Swath Spatially-Resampled Brightness Temperatures will no longer be available from NSIDC.

Version 3 of the AMSR-E/Aqua L2A Global Swath Spatially-Resampled Brightness Temperatures data set, which uses the most up-to-date algorithm, will remain available.

Data FTP URL Change

22 January 2014

Notice to Users of AMSR-E, GLAS, IceBridge, MODIS and NISE Data.

The FTP location for accessing AMSR-E, GLAS, IceBridge, MODIS, and NISE data changed in October from n4ftl01u.ecs.nasa.gov to n5eil01u.ecs.nsidc.org. Redirects that were previously put in place for users connecting to n4ftl01u.ecs.nasa.gov were removed. Users connecting to our FTP through a script or through an FTP download program should change the host name to n5eil01u.ecs.nasa.gov in order to continue retrieving data. Please contact NSIDC User Services with any questions.

Land Surface Emissivity Data from AMSR-E/Aqua Now Available

26 August 2013

Global, monthly land surface emissivity data from the Advanced Microwave Scanning Radiometer – Earth Observing System (AMSR-E) are now available at NSIDC. These data complement existing passive microwave measurements from the Special Sensor Microwave Imager (SSM/I) and Advanced Microwave Sounding Unit (AMSU) by offering land emissivity from 18.7, 23.8, 36.5, and 89.0 GHz, as well from two lower frequencies: 6.9 and 10.65 GHz. According to Principal Investigator, Hamidreza Norouzi, observations from the lower C- and X-band frequencies are able to penetrate deeper into the soil layer.

To access the data and documentation, see the AMSR-E/Aqua Monthly Global Microwave Land Surface Emissivity Web page.

 

Reprocessing Complete for AMSR-E Version 3 Brightness Temperatures

26 July 2013

Version 3 reprocessing is now complete for the AMSR-E/Aqua Level-2A Global Swath Spatially-Resampled Brightness Temperatures (AE_L2A) data set. Changes to the Version 3 algorithm for these data include:

  • Improved Radio Frequency Interference (RFI) flagging and recalibration according to the Remote Sensing Systems (RSS) Version 7 standard. The RSS Version 7 algorithm involves intercalibration with other microwave radiometers, calibration with an improved Radiative Transfer Model (RTM), improved calibration over land, and several other calibration adjustments.
  • An additional 18 days of data, spanning 01 June 2002 through 18 June 2002.

More information regarding AMSR-E L2A Version 3 algorithm changes is available on the AMSR-E Data Versions page. For documentation and data access, see the data set catalog page.

Please contact NSIDC User Services with questions you have regarding these or other NSIDC data.

Reprocessing Underway for AMSR-E/Aqua L2A Data

14 June 2013

Updated Version 3 brightness temperature data are now available for the AMSR-E/Aqua Level-2A Global Swath Spatially-Resampled Brightness Temperatures (AE_L2A) data set. Changes to the Version 3 algorithm for these data include:

  • Improved Radio Frequency Interference (RFI) flagging and recalibration according to the Remote Sensing Systems (RSS) Version 7 standard. The RSS Version 7 algorithm involves intercalibration with other microwave radiometers, calibration with an improved Radiative Transfer Model (RTM), improved calibration over land, and several other calibration adjustments.
  • An additional 18 days of data, spanning 01 June 2002 through 18 June 2002.

More information regarding AMSR-E L2A Version 3 algorithm changes is available on the AMSR-E Data Versions page. For documentation and data access, see the product catalog page.

Please contact NSIDC User Services with questions you have regarding these or other NSIDC data.