Near-Real-Time DMSP SSM/I-SSMIS Daily Polar Gridded Sea Ice Concentrations

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Entry ID

NSIDC-0081

Summary

This data set provides a near-real-time (NRT) map of sea ice concentrations for both the Northern and Southern Hemispheres. The near-real-time passive microwave brightness temperature data are acquired with the Special Sensor Microwave Imager/Sounder (SSMIS) on board the Defense Meteorological Satellite Program (DMSP) F17 satellite. The SSMIS instrument is the next generation Special Sensor Microwave/Imager (SSM/I) instrument. SSMIS data are received daily from the Comprehensive Large Array-data Stewardship System (CLASS) at the National Oceanic and Atmospheric Administration (NOAA) and are gridded onto a polar stereographic grid. Investigators generate sea ice concentrations from these data using the NASA Team algorithm.

These data are stored as one-byte flat scaled binary arrays with one byte per pixel, at a resolution of 25 km. For each data file, a corresponding PNG image file is provided. These data are available via FTP for the most recent three to six months and are retained on the FTP site until NSIDC's Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I Passive Microwave Data (preliminary data) become available for the same time period.

These data are primarily meant to provide a best estimate of current ice and snow conditions based on information and algorithms available at the time the data are acquired. Near-real-time products are not intended for operational use in assessing sea ice conditions for navigation and should be used with caution in extending the sea ice time series in NSIDC's Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I Passive Microwave Data.

Geographic Coverage

 

Spatial Coordinates:
N: -39.23°     S: -90°     E: 180°     W: -180°    
N: 90°     S: 30.98°     E: 180°     W: -180°    

Data Set Citation

Dataset Creator: Maslanik, J. and J. Stroeve.
Dataset Title: Near-Real-Time DMSP SSM/I-SSMIS Daily Polar Gridded Sea Ice Concentrations
Dataset Release Date: 1999-01-01updated daily
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/nsidc-0081.html

Temporal Coverage

Start Date: 2014-01-01
Stop Date: 2014-10-23

Start Date: 2014-01-01
Stop Date: 2014-10-23

Data Resolution

Latitude Resolution: 25 km
Longitude Resolution: 25 km
Temporal Resolution: 1 day

Location Keywords

  • CONTINENT ANTARCTICA
  • GEOGRAPHIC REGION ARCTIC
  • GEOGRAPHIC REGION POLAR

Science Keywords

  • Cryosphere Sea Ice Sea Ice Concentration
  • Cryosphere Sea Ice Sea Ice Concentration
  • Oceans Sea Ice Sea Ice Concentration
  • Oceans Sea Ice Sea Ice Concentration

Ancillary Keywords

  • Antarctic
  • Arctic
  • DMSP
  • Gridded Data
  • Ice
  • Ice Concentration
  • Near Real-time
  • Passive Microwave
  • Polar
  • Polar Stereographic
  • Remote Sensing
  • Sea Ice
  • Sea Ice Concentration
  • SMMR
  • Special Sensor Microwave Imager/Sounder
  • SSM/I
  • SSMIS

ISO Topic Category (View Definitions)

  • Climatology/Meteorology/Atmosphere
  • Oceans

Platform

  • DMSP 5D-2/F13 Defense Meteorological Satellite Program-F13
  • DMSP 5D-2/F15 Defense Meteorological Satellite Program-F15
  • DMSP 5D-3/F17 Defense Meteorological Satellite Program-F17

Instrument

  • SSM/I Special Sensor Microwave/Imager
  • SSMIS Special Sensor Microwave Imager/Sounder

Project

  • EOSDIS Earth Observing System Data Information System
  • ESIP Earth Science Information Partners Program

Quality

This near-real-time sea ice concentration (NRTSI) data set is created using brightness temperatures from NOAA's Comprehensive Large Array-data Stewardship System (CLASS) in order to provide the product within one to two days following data acquisition. These brightness temperatures do not receive the same level of quality control as the DMSP SSM/I-SSMIS Daily Polar Gridded Brightness Temperatures product created at NSIDC.

Additionally, these NRTSI data may be missing swaths and contain erroneous ice over ocean that was missed by the weather filters.

Use Constraints

These data are intended to facilitate time-sensitive research dependent upon precise detection of seasonal polar sea ice formation and break up. These data are primarily meant to provide a best estimate of current ice and snow conditions based on information and algorithms available at the time the data are acquired. Near-real-time products are not intended for operational use in assessing sea ice conditions for navigation and should be used with caution in extending the sea ice time series. For historical SMMR and SSM/I sea ice concentration data, please see Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I Passive Microwave Data.

Data Set Progress

in work

Originating Center

NSIDC_DAAC

Data Center

NASA DAAC at the National Snow and Ice Data Center
Data Center URL: http://nsidc.org/daac/index.html

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

National Snow and Ice Data Center
Data Center URL: http://nsidc.org

Data Center Personnel

Name: NSIDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Distribution

Distribution Media: FTP
Distribution Format: PNG

Distribution Media: FTP
Distribution Size: 102.7 KB
Distribution Format: Binary

Distribution Media: FTP
Distribution Size: 133.3 KB
Distribution Format: Binary

Personnel

Jim Maslanik
Role: INVESTIGATOR
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@kryos.colorado.edu
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309

Jim Maslanik
Role: INVESTIGATOR
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@kryos.colorado.edu
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309

Julienne Stroeve
Role: INVESTIGATOR
Email: stroeve@nsidc.org
Contact Address:

  • CIRES
  • National Snow and Ice Data Center
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309

Kenneth Knowles
Role: INVESTIGATOR
Contact Address:

  • National Snow and Ice Data Center
  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Walt Meier
Role: INVESTIGATOR
Email: walter.n.meier@nasa.gov
Contact Address:

  • NASA Goddard Space Flight Center

City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA

Donald J. Cavalieri
Role: INVESTIGATOR
Phone: 1 301 614-5901 x
Fax: 1 301 614-5644 x
Email: Donald.J.Cavalieri@nasa.gov
Contact Address:

  • NASA Goddard Space Flight Center
  • Laboratory for Hydrospheric Processes
  • NASA/GSFC
  • Mail Code: 615

City: Greenbelt
Province or State: MD
Postal Code: 20771
Country: USA

NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@nsidc.org
Contact Address:

  • National Snow and Ice Data Center
  • CIRES, 449 UCB
  • University of Colorado

City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA

Related URL

VIEW PROJECT HOME PAGE
Sea Ice Data at NSIDC

VIEW RELATED INFORMATION
Near-Real-Time SSM/I EASE-Grid Daily Global Ice Concentration and Snow Extent

VIEW RELATED INFORMATION
Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I Passive Microwave Data

VIEW RELATED INFORMATION
Sea Ice Index

Reference

Cavalieri, D. J., P. Gloersen, and W. J. Campbell. 1984. Determination of Sea Ice Parameters with the NIMBUS-7 SMMR. Journal of Geophysical Research 89(D4):5355-5369.

Cavalieri, D. J., C. I. Parkinson, P. Gloersen, and H. J. Zwally. 1997. Arctic and Antarctic Sea Ice Concentrations from Multichannel Passive-Microwave Satellite Data Sets: October 1978 to December 1996, User's Guide. NASA Technical Memorandum 104647. 17 pages.

For a complete list of references, see the References and Related Publications section in the documentation for NSIDC's Sea Ice Concentrations from Nimbus-7 SMMR and DMSP SSM/I Passive Microwave Data.

Metadata Name and Version

Metadata Name: CEOS IDN DIF
Metadata Version: 9.7

Creation and Review Dates

DIF Creation Date: 1999-01-01
Last DIF Revision Date: 2014-08-28

Metadata Views

DIF Text-Only

Directory Interchange Format (DIF) in plain text

DIF XML

Directory Interchange Format (DIF) in Extensible Markup Language (XML)

FGDC HTML

U.S. Federal Geographic Data Committee (FGDC) Content Standard for Digital Geospatial Metadata (CSDGM)

ISO HTML

International Organization for Standardization (ISO) 19115:2003 Geographic Information Metadata

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