Get Data

Polaris: Search and order tool for subsetting, reprojecting, and reformatting data.
Data Set ID:

Near-Real-Time DMSP SSMIS Daily Polar Gridded Sea Ice Concentrations, Version 1

Due to technical difficulties, there is a delay in the release of the most recent data for this product. We are working to make the data available as soon as possible. Please contact NSIDC User Services if you have any questions.

This data set provides a Near-Real-Time (NRT) map of sea ice concentrations for both the Northern and Southern Hemispheres.

Version Summary:
  • June 2016

    Starting on 1 April 2016, sea ice concentration fields are computed using F18 data.
  • March 2015

    New smaller pole hole mask used: SSMIS Pole Hole.

    New spurious ice masks: NIC Valid Ice Masks..
  • 1999

    Initial release of this data product.

Geographic Coverage

Spatial Coverage:
  • N: 90, S: 30.98, E: 180, W: -180

  • N: -39.23, S: -90, E: 180, W: -180

Spatial Resolution:
  • 25 km x 25 km
Temporal Coverage:
  • 1 January 2015 to 8 July 2016
(updated daily)
Temporal Resolution: 1 day
  • Sea Ice > Sea Ice Concentration
Platform(s) DMSP 5D-3/F17, DMSP 5D-3/F18
Sensor(s): SSMIS
Data Format(s):
  • PNG
  • Binary
Version: V1
Data Contributor(s): Jim Maslanik, Julienne Stroeve, Kenneth Knowles, Walt Meier, Donald Cavalieri

Data Citation

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Maslanik, J. and J. Stroeve. 1999, updated daily. Near-Real-Time DMSP SSMIS Daily Polar Gridded Sea Ice Concentrations, Version 1. [Indicate subset used]. Boulder, Colorado USA. NASA National Snow and Ice Data Center Distributed Active Archive Center. doi: [Date Accessed].
Questions? Please contact:

NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Contact Address:
National Snow and Ice Data Center
University of Colorado
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA