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All MODIS Snow Cover Data Sets Now Available in Version 6

27 July 2016

The final four MODIS snow cover data sets are now available in Version 6 at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC):

In Version 6, Fractional Snow Cover previously used as input has been replaced by Normalized Difference Snow Index (NDSI) snow cover. In addition, the Confidence Index in the 8-day data sets has been discontinued in favor of a new Clear Index, that reports the percentage of 500 m non-cloud cells used to estimate snow cover in each Climate Modeling Grid (CMG) cell.

Also new for Version 6, a Quantitative Image Restoration technique has been utilized to restore Aqua MODIS band 6 data to scientific quality, allowing the same snow detection algorithm to be applied to both Aqua and Terra. Additional changes are described in the Version Summary on each data set’s Web page.

Reprocessing is now complete for all MODIS snow cover and sea ice data sets at NSIDC. Forward-processing will continue for all products in both Version 6 and Version 5 through the end of 2016. Version 5 forward-processing will be discontinued on 31 December, 2016.

To obtain MODIS snow cover and sea ice data, visit the MODIS Data Summaries page.

More Version 6 MODIS Snow Cover Data Sets Now Available

31 May 2016

Four more Version 6 MODIS snow cover data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC):

In Version 6, Fractional Snow Cover has been replaced by Normalized Difference Snow Index (NDSI) snow cover. In addition, a Quantitative Image Restoration technique has been utilized to restore Aqua MODIS band 6 data to scientific quality, allowing the same snow detection algorithm to be applied to both Aqua and Terra. Additional changes are described in the Version Summary on each data set’s Web page.

The entire time series for these data sets is currently being reprocessed to Version 6 by our data provider, the MODIS Adaptive Processing System (MODAPS). Users should expect limited coverage until reprocessing is complete. For additional details, see MODIS | V6 Reprocessing Plan.

Until all the data are reprocessed, NSIDC will continue to distribute both Version 5 and Version 6 of the MODIS/Terra and MODIS/Aqua snow cover data sets. All of NSIDC’s MODIS snow and sea ice data sets are available through the MODIS Data Summaries page.

MODIS Swath, 500 m Gridded Snow Cover Data Now Available in Version 6

28 April 2016

Four Version 6 MODIS snow cover data sets are now available at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC):

Data Set DOI MODIS/Terra Snow Cover 5-Min L2 Swath500m (MOD10_L2) 10.5067/MODIS/MOD10_L2.006 MODIS/Aqua Snow Cover 5-Min L2 Swath 500m (MYD10_L2) 10.5067/MODIS/MYD10_L2.006 MODIS/Terra Snow Cover Daily L3 Global 500m Grid (MOD10A1) 10.5067/MODIS/MOD10A1.006 MODIS/Aqua Snow Cover Daily L3 Global 500m Grid (MYD10A1) 10.5067/MODIS/MYD10A1.006

In Version 6, Fractional Snow Cover has been replaced by Normalized Difference Snow Index (NDSI) snow cover. Binary Snow-Covered Area has been discontinued. Version 6 also incorporates a Quantitative Image Restoration technique that restores Aqua MODIS band 6 data to scientific quality. Thus the snow detection algorithms are now the same for Aqua and Terra. Additional changes are described in the Version Summary on each data set’s Web page.

The entire time series for these data sets is being reprocessed to Version 6 by the data provider, MODIS Adaptive Processing System (MODAPS). Users should expect limited temporal coverage while reprocessing is ongoing. For additional details, see MODIS | V6 Reprocessing Plan

NSIDC will continue to distribute both Version 5 and Version 6 of the MODIS/Terra and MODIS/Aqua snow cover data sets until reprocessing is complete. To access these data, see MODIS Data Summaries.

MODIS Version 6 Sea Ice Reprocessing Complete

9 November 2015

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is pleased to announce that Version 6 (Collection 6) reprocessing is complete for our MODIS sea ice data sets. Forward–processing will continue for both Version 5 and Version 6 for approximately one year, after which Version 5 forward-processing will be discontinued. To obtain MODIS Version 6 sea ice data, visit MODIS | Data Sets | Sea Ice.

Questions? Contact NSIDC’s User Services Office.

NSIDC DAAC Releases Version 6 MODIS Sea Ice Data

29 May 2015

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) is pleased to announce that users can now obtain Version 6 (Collection 6) MODIS sea ice data.

The MODIS Version 6 sea ice extent and ice surface temperature algorithms and products are the same as Version 5; however, Version 6 updates to algorithm inputs—in particular, the L1B calibrated radiances, land and water mask, and cloud mask products—have improved the sea ice outputs. For information about forward and reprocessing schedules, see MODIS | V6 Sea Ice Reprocessing.

To obtain Version 6 sea ice data, visit the MODIS | Data Sets Web page.

Reprocessed MODIS Data Now Available

22 October 2014

The NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been informed that our data provider, MODAPS, identified corrupt files that may have impacted previously forward processed data for all MODIS snow and sea ice products. NSIDC recommends that MODIS snow and sea ice data users replace the following files:

MODIS Terra
Files from Day of Year (DOY) 256 to DOY 271, downloaded before 6 October 2014.
Files from DOY 277 to 282, downloaded before 11 October 2014.

MODIS Aqua
Files for DOY 271, downloaded before 6 October 2014.
Files from DOY 277 to 280, downloaded before 11 October 2014.

To obtain the reprocessed data, simply re-download the affected files from NSIDC. A listing of MODIS data products can be found at:
http://nsidc.org/data/modis/data_summaries/index.html

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

MODIS Data Delays

30 September 2014

NSIDC is experiencing delays receiving some MODIS data sets from our data provider. We apologize for the inconvenience. Please contact User Services if you have questions.

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.

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.

MODIS Browse Images Unavailable

21 November 2011

12,500 Browse Images from 19 June 2002 to 10 September 2002 are unavailable for MODIS/Terra Snow Cover 5-Min L2 Swath 500m (MOD10_L2) and MODIS/Terra Sea Ice Extent 5-Min L2 Swath 1km (MOD29).

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.

Power Outage at Goddard Causes MODIS Data Loss

5 October 2010

Due to a power outage at the Goddard Space Flight Facility on 22 September 2010, there were satellite data losses for the MODIS/Terra and MODIS/Aqua sea ice and snow products.

MODIS/Terra Snow Cover Daily L3 Global 500m Grid (MOD10A1) Version 4 Snow Data Product Removed from NSIDC’s Archive

8 July 2009

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.