On Wednesday, April 25 from 9:00 a.m. to 12:00 p.m. (USA Mountain Time), the following data collections will not be available due to planned system maintenance: AMSR-E, Aquarius, High Mountain Asia, IceBridge, ICESat/GLAS, MEaSUREs, MODIS, NISE, SMAP, and VIIRS. 

Data Announcements

NSIDC Data Viewer Tool being Decommissioned

17 August 2017

On 1 September 2017, the NSIDC Data Viewer tool will be decommissioned; thus, permanently unavailable for any future use. There are no plans to replace it at this time.

AMSR-E/AMSR2 Unified L2B Half-Orbit 25 km EASE-Grid Surface Soil Moisture, Version 1 Released

6 February 2017

The Science Investigator-led Processing System (SIPS) has released the AMSR-E/AMSR2 Unified L2B Half-Orbit 25 km EASE-Grid Surface Soil Moisture data set. This data set provides a long-term data record (23 July 2002 through present) using a combination of AMSR-E and AMSR2 data with reprocessed AMSR-E L1R brightness temperatures. Backprocessing is ongoing, with data available from 23 July 2012 to date.

These data are available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC).

Data set DOI: http://dx.doi.org/10.5067/IKQ0G7ODMLC7

NSIDC Polaris Search and Order being Retired 15 February 2017

2 February 2017

THE NSIDC Polaris Search and Order tool will be retired on 15 February 2017. Please contact NSIDC User Services via email: nsidc@nsidc.org with questions.

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.

AMSR2 Brightness Temperature Data Now Available at JAXA

13 May 2013

Brightness Temperature data products from the Advanced Microwave Scanning Radiometer 2 (AMSR2) onboard the Global Change Observation Mission 1st – Water (GCOM-W1) satellite have recently been released by the Japan Aerospace Exploration Agency (JAXA). For additional information and access to the data, visit the GCOM-W JAXA EROC Web site.

Reprocessing of AMSR-E Sea Ice Products

15 November 2012

NSIDC has been notified of an error in AMSR-E sea ice data products that caused valid data in the Southern Hemisphere to be obscured by a land mask. The products and algorithms affected by this error are:

AMSR-E/Aqua Daily L3 12.5 km Tb, Sea Ice Concentration, and Snow Depth Polar Grids, V14
AMSR-E/AQUA Daily L3 25 km Tb, Sea Ice Temperature, & Sea Ice Conc. Polar Grids, V14
AMSR-E/Aqua Daily L3 6.25 km Sea Ice Drift Polar Grids, B03

During the recent V14 algorithm processing, an improved land mask for Antarctica was incorrectly implemented in the AMSR-E 12.5 km and 25 km sea ice products, which caused portions of valid data to be masked between approximately 65° W longitude and 68° E longitude. The AMSR-E sea ice drift product was also affected by this error since the 12.5 km sea ice data are used as an input.

Both the 12.5 km and 25 km sea ice products with the V14 algorithm have been replaced with data using the V12 and V13 algorithm. The sea ice drift data with the B03 algorithm have been replaced with data using the B01 algorithm. In the meantime, the error is being corrected in the V14 algorithm code, and all data will be reprocessed. We will notify registered data users when reprocessing begins. Please contact NSIDC User Services with inquiries regarding these products.

AMSR-E Sea Ice Products Updated

12 September 2012

pdates are complete for following AMSR-E data products:
AMSR-E/AQUA Daily L3 6.25 km 89GHz Brightness Temperature Polar Grids
AMSR-E/Aqua Daily L3 12.5 km Tb, Sea Ice Concentration, and Snow Depth Polar Grids
AMSR-E/AQUA Daily L3 25 km Tb, Sea Ice Temperature, & Sea Ice Conc. Polar Grids
Algorithm updated to: Validated 14 – Stage 1
Summary of updates: Includes an improved land mask for Antarctica, created from a National Ice Center (NIC) landmask shapefile. The NIC shapefile is the newest ice shelf definition, completed by NIC Science Department in June 2011. The shoreline was developed from ENVISAT and RADARSAT imagery from October 2009 until April 2010.

AMSR-E/Aqua Daily L3 100 km Sea Ice Drift Polar Grids
Algorithm updated to: Beta 03
Summary of updates: Includes browse imagery. Reprocessing will span entire AMSR-E mission. Users should note that the Beta 02 algorithm was not publicly released.

Reprocessing from the beginning of the mission onward is currently underway for these products. We will notify registered users when reprocessing is complete. Please contact NSIDC User Services with inquiries regarding these products.

Reprocessing Complete for AMSR-E/Aqua L1A Data

21 August 2012

The Japan Aerospace Exploration Agency (JAXA) has completed reprocessing of the AMSR-E/Aqua L1A Raw Observation Counts data set to Version 3. These Version 3 data are now available from the beginning of the AMSR-E mission through 04 October 2011, when the AMSR-E sensor stopped operating. The new version includes improved geometric accuracy and a switch to a new HDF version, from 4.2r1 to 4.2r4.

Also included with Version 3 are an additional 18 days of data spanning 01 June 2002 through 18 June 2002, which were previously unavailable. An assessment of these data collected during the initial AMSR-E evaluation period indicated that the quality of the observations is high enough to release to AMSR-E data users. Since it contains the most up-to-date algorithm available, we recommend working with Version 3 data set. For information and ordering options, see the product catalog page.

NSIDC will continue to distribute the Version 2 AMSR-E/Aqua L1A Raw Observation Counts data set until 15 February 2013, when it will be removed from the archive.

Please contact NSIDC User Services with inquiries regarding these products.

AMSR-E Instrument Failure

4 October 2011

As of 06:58 UTC on 04 October 2011, the AMSR-E instrument on board the Aqua satellite stopped producing data due to a problem with the rotation of its antenna.

New AMSR-E/Aqua L1A Data Available

30 September 2011

On 28 September 2011, Version 3 (V003) of the AMSR-E/Aqua L1A Raw Observation Counts data set was released by the Japan Aerospace Exploration Agency (JAXA).

NSIDC Releases Enhanced SSM/I and AMSR-E Brightness Temperatures

15 August 2011

A new data set is available at NSIDC, the Enhanced-Resolution SSM/I and AMSR-E Daily Polar Brightness Temperatures.

AMSR-E Sea Ice Drift Data Now Available from NSIDC

14 July 2011

NSIDC has released a new sea ice data set, the AMSR-E/Aqua Daily L3 6.25 km Sea Ice Drift Polar Grids.

Updated AMSR-E/Aqua Brightness Temperatures Available

25 May 2011

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.

Preliminary Level-3 AMSR-E Data to be Discontinued

29 April 2011

On 02 May 2011, NSIDC will discontinue distribution of Preliminary Level-3 AMSR-E data.

Updated AMSR-E Brightness Temperatures Available

11 February 2011

On 26 January 2011, the AMSR-E/Aqua L2A Global Swath Spatially-Resampled Brightness Temperatures were updated to V11 (Validated 11 – Stage 3).

New RSS Data Feed Available for AMSR-E and MODIS Products

27 October 2010

Data users can now subscribe to receive new AMSR-E and MODIS data via an RSS data feed as soon as they are ingested at NSIDC.

Updated L2 AMSR-E Data Released, Available Sooner

25 October 2010

Updated Level-2 AMSR-E data products were released by the AMSR-E Science Investigator-led Processing System (SIPS) on 20 October 2010. NSIDC is also pleased to announce that AMSR-E Level-2 products are now available only 20 hours from the time of observation.

Preliminary Level-2 AMSR-E Data to be Discontinued, Standard Level-2 AMSR-E Data Available Sooner

4 October 2010

Preliminary Level-2 Advanced Microwave Scanning Radiometer – Earth Observing System (AMSR-E) data will be discontinued on 18 October 2010. Also beginning on this date, the latency of standard Level-2 AMSR-E science products will be reduced from five days to 20 hours from the time of observation.

AMSR-E Sea Ice Products Updated, Concentration Difference Corrected

3 September 2010

New versions of the Advanced Microwave Scanning Radiometer – Earth Observing System (AMSR-E) Level-3 sea ice data products were released by the AMSR-E Science Investigator-led Processing System (SIPS) on 27 August 2010.

Updated Level-3 AMSR-E Products Released

3 September 2010

Updated Advanced Microwave Scanning Radiometer – Earth Observing System (AMSR-E) Level-3 data products were released by the AMSR-E Science Investigator-led Processing System (SIPS) on 27 August 2010.

AMSR-E Level-3 Ocean Products Updated to V04

20 May 2010

AMSR-E Level-3 ocean products have been updated to Validated 4 (V04-Stage 1). The new V04 algorithm incorporates measures to further reduce Radio Frequency Interference (RFI), and the products now include an RFI angle grid as a parameter.

AMSR-E/Aqua Brightness Temperatures Updated

27 April 2010

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.

V12-Stage 1 AMSR-E Level-3 Sea Ice Products Now Available

2 April 2010

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

New Combined AMSR-E, QuikSCAT, and WMO Data Set

25 March 2010

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

AMSR-E/Aqua Brightness Temperatures Updated

21 January 2010

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.

“Snow Depth on Sea Ice” Parameter Corrected for the 2009/2010 Winter Sea Ice Season in AE_SI12 Product

10 November 2009

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

AMSR-E/Aqua Brightness Temperatures Updated

15 October 2009

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.

Reprocessing Complete for two AMSR-E Data Products: AE_L2A and AE_Land

27 July 2009

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.

Reprocessing Complete for AMSR-E Level-3 Land, Sea Ice, and Snow Data Products

27 July 2009

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.

Quarterly Processing of AMSR-E/Aqua Brightness Temperatures Complete

16 July 2009

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.

Release of Validated 11 AMSR-E Level-3 Sea Ice Products

8 June 2009

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.

Beginning 10 June 2009, Version 1 AMSR-E Data Will No Longer Be Available

20 May 2009

Beginning 10 June 2009, Version 1 AMSR-E data will no longer be available from NSIDC.

Reprocessing has Begun for AMSR-E Level-3 Land, Sea Ice, and Snow Data Products

13 May 2009

Reprocessing has begun for AMSR-E Level-3 Land, Sea Ice, and Snow data products.

Quarterly Processing of AMSR-E/Aqua Brightness Temperatures Complete

23 April 2009

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. This update extends the time series of both data sets to 31 March 2009. The data in this update are still considered Version 3.

Complete Collection of Soil Moisture Experiment 2003 (SMEX03) Data Sets Available

8 April 2009

NSIDC is pleased to announce that AMSR-E Soil Moisture Validation data have been updated to include all data sets for the Soil Moisture Experiment 2003 (SMEX03) campaign.

Tiepoints Used in Algorithm May Result in a Relative Change in Sea Ice Area and Extent

6 April 2009

Two recent improvements in tiepoints used in the AMSR-E standard sea ice concentration algorithm may result in a relative change in sea ice area and extent for users working with multiple versions of the data.

Distribution of AMSR-E, MODIS, GLAS, and NISE Data on Hard Media No Longer Available After 11 March 2009

25 February 2009

Beginning 11 March 2009, NSIDC will no longer offer distribution on hard media (CD-ROM, DVD,
DLT) for AMSR-E, MODIS, GLAS, or NISE data sets.

AMSR-E Level-2 and Level-3 Land and Level-3 Snow Products Validated

15 December 2008

Beginning on 01 December 2008, AMSR-E Level-2 and Level-3 Land products and Level-3 Snow products are Stage 1 validated.

AMSR-E Level-3 Reprocessing Complete

7 October 2008

Reprocessing is complete for all AMSR-E/Aqua Level-3 products. Data from 19 June 2002 (the start of the AMSR-E mission) to present are now Version 2, the validated or transitional version of the algorithm.

AMSR-E Level-2B Reprocessing Complete

7 October 2008

Reprocessing is complete for all AMSR-E/Aqua Level-2B products. Data from 19 June 2002 (the start of the AMSR-E mission) to present are now Version 2, the validated or transitional version of the algorithm.

AMSR-E/Aqua Daily L3 12.5 km data now available for Google Earth

16 September 2008

NSIDC is pleased to announce that sea ice concentrations from AMSR-E/Aqua Daily L3 12.5 km Brightness Temperatures, Sea Ice Concentration, and Snow Depth Polar Grids (AE_SI12) were created as .kml files for use in Earth browsers, such as Google Earth. These files include the latest 30-day, 60-day, and 90-day animations of the daily sea ice concentrations and sea ice extent in the Arctic.

Reprocessing of all AMSR-E Level 3 sea ice products

15 August 2008

Reprocessing is underway for all AMSR-E Level 3 sea ice products with data from 19 June 2002, the start of the AMSR-E mission, and will continue through 5 July 2008.

Select Version 2 AMSR-E Level 3 snow products removed from NSIDC archives

5 August 2008

Due to an error in an ancillary data file, the following Version 2 AMSR-E Level 3 snow products were removed from NSIDC’s archives: AMSR-E/Aqua Daily L3 Global Snow Water Equivalent EASE-Grids (AE_DySno); AMSR-E/Aqua 5-Day L3 Global Snow Water Equivalent EASE-Grids (AE_5DySno); AMSR-E/Aqua Monthly L3 Global Snow Water Equivalent EASE-Grids (AE_MoSno).

Version 2 AMSR-E Level 3 data now available

4 August 2008

As of 06 July 2008, Version 2 of AMSR-E Level 3 land, rain, ocean, snow, and sea ice products are now available at NSIDC, and are considered Transitional (T) or Validated (V).