Entry_ID: NISE1
Entry_Title: Near-Real-Time SSM/I-SSMIS EASE-Grid Daily Global Ice Concentration and Snow Extent
Group: Data_Set_Citation
   Dataset_Creator: Nolin, A. W., R. Armstrong, and J. Maslanik. 
   Dataset_Title: Near-Real-Time SSM/I-SSMIS EASE-Grid Daily Global Ice Concentration and Snow Extent
   Dataset_Release_Date: 1998-01-01
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
   Version: 4
   Online_Resource: http://nsidc.org/data/nise1.html
End_Group
Group: Personnel
   Role: Technical Contact
   First_Name: NSIDC
   Last_Name: User Services
   Email: nsidc@nsidc.org
   Phone: 1 303 492-6199 x
   Fax: 1 303  492-2468 x
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: CIRES, 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Anne
   Middle_Name: W.
   Last_Name: Nolin
   Group: Contact_Address
      Address: Oregon State Univesity
      Address: Department of Geosciences
      Address: Oregon State University
      Address: 104 Wilkinson Hall
      City: Corvallis
      Province_or_State: OR
      Postal_Code: 80309-0449
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Richard
   Last_Name: Armstrong
   Email: rlax@nsidc.org
   Phone: 1 303 492-6199 
   Fax: 1 303  492-2468 
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: National Snow and Ice Data Center
      Address: CIRES 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: Colorado
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Richard
   Last_Name: Armstrong
   Email: rlax@nsidc.org
   Phone: 1 303 492-6199 
   Fax: 1 303  492-2468 
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: National Snow and Ice Data Center
      Address: CIRES 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: Colorado
      Postal_Code: 80309-0449
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Jim
   Last_Name: Maslanik
   Email: nsidc@kryos.colorado.edu
   Phone: 1 303 492-6199 
   Fax: 1 303  492-2468 
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: CIRES, 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Jim
   Last_Name: Maslanik
   Email: nsidc@kryos.colorado.edu
   Phone: 1 303 492-6199 
   Fax: 1 303  492-2468 
   Group: Contact_Address
      Address: National Snow and Ice Data Center
      Address: CIRES, 449 UCB
      Address: University of Colorado
      City: Boulder
      Province_or_State: CO
      Postal_Code: 80309
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Ice Extent
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Sea Ice Concentration
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Ice Extent
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Cover
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Sea Ice
   Variable_Level_1: Ice Extent
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Sea Ice
   Variable_Level_1: Sea Ice Concentration
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Ice Extent
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Cover
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: Antarctic
Keyword: Arctic
Keyword: DAAC
Keyword: ECS
Keyword: EOSDIS
Keyword: Global
Keyword: Global Change
Keyword: Gridded Data
Keyword: HDF-EOS
Keyword: Hierarchical Data Format
Keyword: Ice
Keyword: Ice Concentration
Keyword: NASA
Keyword: Near Real-time
Keyword: NISE
Keyword: NSIDC
Keyword: Passive Microwave
Keyword: Polar
Keyword: Remote Sensing
Keyword: Sea Ice
Keyword: Sea Ice Concentration
Keyword: Sea Ice Extent
Keyword: Snow
Keyword: Snow Extent
Sensor_Name: SSM/I > Special Sensor Microwave/Imager
Sensor_Name: SSMIS > Special Sensor Microwave Imager/Sounder
Source_Name: DMSP 5D-2/F13 > Defense Meteorological Satellite Program-F13
Source_Name: DMSP 5D-3/F17 > Defense Meteorological Satellite Program-F17
Group: Temporal_Coverage
   Start_Date: 1995-05-04
End_Group
Data_Set_Progress: in work
Group: Spatial_Coverage
   Southernmost_Latitude: -90
   Northernmost_Latitude: 90
   Westernmost_Longitude: -180
   Easternmost_Longitude: 180
End_Group
Group: Location
   Location_Category: CONTINENT
   Location_Type: ANTARCTICA
End_Group
Group: Location
   Location_Category: GEOGRAPHIC REGION
   Location_Type: ARCTIC
End_Group
Group: Location
   Location_Category: GEOGRAPHIC REGION
   Location_Type: NORTHERN HEMISPHERE
End_Group
Group: Location
   Location_Category: GEOGRAPHIC REGION
   Location_Type: SOUTHERN HEMISPHERE
End_Group
Group: Data_Resolution
   Temporal_Resolution: 1 day
End_Group
Project: EOSDIS > Earth Observing System Data Information System
Project: ESIP > Earth Science Information Partners Program
Group: Use_Constraints

   NASA provided funding for the production of this data set through the National 
   Snow and Ice Data Center (NSIDC) Distributed Active Archive Center (DAAC). 
   NSIDC requests that prospective data users tell us how the data will be used 
   and agree to contribute comments regarding the usefulness, relevance, and 
   accuracy of the data). Such feedback is essential to ensure ongoing product 
   improvement.

End_Group
Data_Set_Language: English
Originating_Center: NSIDC_DAAC
Group: Data_Center
   Data_Center_Name: NASA DAAC > NASA DAAC at the National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org/daac/index.html
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Data_Center
   Data_Center_Name: NSIDC > National Snow and Ice Data Center
   Data_Center_URL: http://nsidc.org
   Group: Personnel
      Role: Data Center Contact
      First_Name: NSIDC
      Last_Name: User Services
      Email: nsidc@nsidc.org
      Phone: 1 303 492-6199 
      Fax: 1 303  492-2468 
      Group: Contact_Address
         Address: National Snow and Ice Data Center
         Address: CIRES, 449 UCB
         Address: University of Colorado
         City: Boulder
         Province_or_State: CO
         Postal_Code: 80309-0449
         Country: USA
      End_Group
   End_Group
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 2.1 MB
   Distribution_Format: HDF-EOS
End_Group
Group: Reference

   Armstrong, R. L. and M. J. Brodzik. 2002. Hemispheric-Scale Comparison and 
   Evaluation of Passive-Microwave Snow Algorithms. Annals of Glaciology 34: 
   38-44. 

   Armstrong, R. L. and M. J. Brodzik. 2001. Recent Northern Hemisphere Snow 
   Extent: A Comparison of Data Derived from Visible and Microwave Satellite 
   Sensors. Geophysical Research Letters 28(19): 3673-3676.

   Armstrong, R. L., and M. J. Brodzik. 1995. An Earth-Gridded SSM/I Data Set for 
   Cryospheric Studies and Global Change Monitoring. Advances in Space Research 
   16: 155-63.

   Brodzik, M. J. 1998. The EASE-Grid, A Versatile Set of Equal-Area Projections 
   and Grids. Unpublished report to the National Snow and Ice Data Center, 
   Boulder, Colorado USA.

   Cavalieri, D. J., C. l. Parkinson, P. Gloersen, J. C. Comiso, and H. J. 
   Zwally. 1999. Deriving Long-Term Time Series of Sea Ice Cover from Satellite 
   Passive-Microwave Multisensor Data Sets. Journal of Geophysical Research 
   104(7): 15,803-15,814.

   Cavalieri, D. J., J. Crawford, M. Drinkwater, W. J. Emery, D. T. Eppler, L. D. 
   Farmer, M. Goodberlet, R. Jentz, A. Milman, C. Morris, R. Onstott, A. 
   Schweiger, R. Shuchman, K. Steffen, C. T. Swift, C. Wackerman, and R. L. 
   Weaver. 1992. NASA Sea Ice Validation Program for the DMSP SSM/I: Final 
   Report. NASA Technical Memorandum 104559. National Aeronautics and Space 
   Administration, Washington, D. C. 126 pages.

   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): 
   5355-69.

   Chang, A. T. C., J. L. Foster, and D. K. Hall. 1987. Nimbus-7 SMMR Derived 
   Global Snow Cover Parameters. Annals of Glaciology 9: 39-44.

   Goodison, B. E. 1989. Determination of Areal Snow Water Equivalent on the 
   Canadian Prairies Using Passive Microwave Satellite Data. IGARRS '89 
   Proceedings 3:1243-6.

   Hollinger, J . P., R. C. Lo, G . A. Poe, R. Savage, and J . L. Peirce, 1987. 
   Special Sensor Microwave/Imager User's Guide. Washington, D.C.: Naval Research 
   Laboratory.

   Knowles, K. 1992. Points, pixels, grids, and cells: A mapping and gridding 
   primer. Unpublished report to the National Snow and Ice Data Center, Boulder, 
   Colorado USA.

   National Snow and Ice Data Center. 2005. EASE-Grid Version of BU-MODIS Land 
   Cover Characterization. ftp://sidads.colorado.edu/pub/EASE/. Boulder, Colorado 
   USA: National Snow and Ice Data Center. Digital media.

   NSIDC User's Guide. 1996. DMSP SSM/I Brightness Temperatures and Sea Ice 
   Concentration Grids for the Polar Regions. 2d ed. NSIDC/DAAC, Boulder, 
   Colorado USA.

   Schwerdtfeger, W. 1976. Climate of Central and South America. World Survey of 
   Climatology 12. New York: Elsevier Scientific Publishing.

   Swift, C. T., and D. J. Cavalieri. 1985. Passive Microwave Remote Sensing for 
   Sea Ice Research. EOS 66(49): 1210-2.

   Wentz, F. J. 1992. Production of SSM/I data sets. NASA Final Report. Contract 
   NAS8-38075.

End_Group
Group: Summary

    
   









 The Near-Real-Time 
   SSM/I-SSMIS EASE-Grid Daily Global Ice Concentration and Snow Extent product 
   (Near-real-time Ice and Snow Extent, NISE) provides daily, global 
   near-real-time maps of sea ice concentrations and snow extent. The National 
   Snow and Ice Data Center (NSIDC) creates the current NISE product using 
   passive microwave data from 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. These data are not suitable for time 
   series, anomalies, or trends analyses. They are 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. Sea ice concentration and snow extent maps are provided in two 
   25 km azimuthal, equal-area projections: the Southern Hemisphere 25 km low 
   resolution (SL) and Northern Hemisphere 25 km low resolution (NL) Equal-Area 
   Scalable Earth-Grids (EASE-Grids). The NISE product is updated daily using the 
   best available data from the past five days. Data are in Hierarchical Data 
   Format - Earth Observing System (HDF-EOS) format and browse files are in GIF 
   and HDF formats. HDF-EOS data files are available from 04 May 1995 through the 
   present. Data in both formats are updated daily and are available via FTP.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/seaice/
   Description: Sea Ice Data 
End_Group
IDN_Node: USA/NASA
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 1998-01-01
Last_DIF_Revision_Date: 2014-05-15
Group: DIF_Revision_History

    Small change to which optional registration form this data set points to, so 
   no QC needed.

End_Group