Entry_ID: AE_SI12
Entry_Title: AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow Depth Polar Grids
Group: Data_Set_Citation
   Dataset_Creator: Cavalieri, D. J., T. Markus, and J. C. Comiso. 
   Dataset_Title: AMSR-E/Aqua Daily L3 12.5 km Brightness Temperature, Sea Ice Concentration, & Snow Depth Polar Grids
   Dataset_Release_Date: 2003-01-01
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC DAAC: NASA DAAC at the National Snow and Ice Data Center
   Version: 2
   Online_Resource: http://nsidc.org/data/ae_si12.html
   Dataset DOI: http://dx.doi.org/10.5067/AMSR-E/AE_SI12.002
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Donald
   Middle_Name: J.
   Last_Name: Cavalieri
   Email: Donald.J.Cavalieri@nasa.gov
   Phone: 1 301 614-5901 x
   Fax: 1 301  614-5644 x
   Group: Contact_Address
      Address: NASA Goddard Space Flight Center
      Address: Laboratory for Hydrospheric Processes
      Address: NASA/GSFC
      Address: Mail Code: 615
      City: Greenbelt
      Province_or_State: MD
      Postal_Code: 20771
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Donald
   Middle_Name: J.
   Last_Name: Cavalieri
   Email: Donald.J.Cavalieri@nasa.gov
   Phone: 1 301 614-5901 x
   Fax: 1 301  614-5644 x
   Group: Contact_Address
      Address: NASA Goddard Space Flight Center
      Address: Laboratory for Hydrospheric Processes
      Address: NASA/GSFC
      Address: Mail Code: 615
      City: Greenbelt
      Province_or_State: MD
      Postal_Code: 20771
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Josephino 'Joey'
   Middle_Name: C.
   Last_Name: Comiso
   Email: josefino.c.comiso@nasa.gov
   Phone: 1 301 614-5708 
   Group: Contact_Address
      Address: Laboratory for Hydrospheric Processes
      Address: Cryospheric Sciences Branch
      Address: NASA/Goddard Space Flight Center
      Address: Code 614
      City: Greenbelt
      Province_or_State: MD
      Postal_Code: 20771
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Thorsten
   Last_Name: Markus
   Email: thorsten.markus@nasa.gov
   Phone: 1 301 614-5882 
   Group: Contact_Address
      Address: Goddard Space Flight Center
      Address: NASA/Goddard Space Flight Center
      Address: Instrumentation Sciences Branch
      Address: Code 614.6
      City: Greenbelt
      Province_or_State: MD
      Postal_Code: 20771
      Country: USA
   End_Group
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: 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: Sea Ice
   Variable_Level_1: Snow Depth
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: Oceans
   Term: Sea Ice
   Variable_Level_1: Snow Depth
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Spectral/Engineering
   Term: Microwave
   Variable_Level_1: Brightness Temperature
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Spectral/Engineering
   Term: Microwave
   Variable_Level_1: Microwave Imagery
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: AE_SI12
Keyword: AMSR-E
Keyword: Aqua
Keyword: BRIGHTNESS TEMPERATURES
Keyword: DAAC
Keyword: EOSDIS
Keyword: EOS PM-1
Keyword: Imagery
Keyword: Modified Bootstrap Algorithm
Keyword: Modified NASA Team Algorithm
Keyword: NASA
Keyword: NSIDC
Keyword: Passive Microwave Radiation
Keyword: Polar Sea Ice
Keyword: Radiance
Keyword: Remote Sensing
Keyword: Sea Ice Concentrations
Keyword: Sea Ice Extent
Keyword: Snow cover over sea ice
Keyword: Snow Depth Over Sea Ice
Keyword: Tbs
Sensor_Name: AMSR-E > Advanced Microwave Scanning Radiometer-EOS
Source_Name: AQUA > Earth Observing System, AQUA
Group: Temporal_Coverage
   Start_Date: 2002-06-19
   Stop_Date: 2011-10-03
End_Group
Data_Set_Progress: in work
Group: Spatial_Coverage
   Southernmost_Latitude: -90
   Northernmost_Latitude: -39.23
   Westernmost_Longitude: -180
   Easternmost_Longitude: 180
End_Group
Group: Spatial_Coverage
   Southernmost_Latitude: 30.98
   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: POLAR
End_Group
Group: Data_Resolution
   Latitude_Resolution: 12.5 km
   Longitude_Resolution: 12.5 km
   Temporal_Resolution: 1 day
End_Group
Project: EOS > Earth Observing System
Project: ESIP > Earth Science Information Partners
Project: EOSDIS > Earth Observing System Data Information System Data and Information System
Group: Quality

   Weather filters are employed for the Level-3 sea ice products to eliminate 
   spurious sea ice concentrations over open ocean resulting from varying 
   atmospheric emission. The weather filters are based on threshold values for 
   the spectral gradient radio and thresholds derived from TB differences. Sea 
   ice products are checked to see if ice concentration values fall within 
   reasonable limits. Diagnostics are based in part on satellite sea ice 
   climatology developed since the Scanning Multichannel Microwave Radiometer 
   (SMMR) era in 1978.

End_Group
Data_Set_Language: English
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: 60 MB
   Distribution_Format: HDF-EOS
End_Group
Group: Reference

   Cavalieri, D. and J. Comiso. 2000. Algorithm Theoretical Basis Document for 
   the AMSR-E Sea Ice Algorithm, Revised December 1. Landover, MD, USA: Goddard 
   Space Flight Center.

   Cavalieri, D.J., K.M. St. Germain, and C.T. Swift. 1995. Reduction of weather 
   effects in the calculation of sea ice concentration with the DMSP SSM/I. 
   Journal of Glaciology 41(139): 455-464.

   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.

   Colbeck, S. C. 1982. An Overview of Seasonal Snow Metamorphism. Reviews of 
   Geophysics Space Physics 20:45-61.

   Comiso, J., D. Cavalieri, and T. Markus. 2003. Sea ice concentration, ice 
   temperature, and snow depth using AMSR-E data. IEEE Transactions on Geoscience 
   and Remote Sensing 41(2): 243-252.

   Comiso, J., and K. Steffen. 2001. Studies of Antarctic sea ice concentrations 
   from satellite data and their applications. Journal of Geophysical Research 
   106(C12): 31,361-31,385.

   Comiso, J. C., D. J. Cavalieri, C. L. Parkinson, and P. Gloersen. 1997. 
   Passive Microwave Algorithms for Sea Ice Concentration - A Comparison of Two 
   Techniques. Remote Sensing of the Environment 60: 357-384. Comiso, J.C. 1995. 
   SSM/I ice concentrations using the Bootstrap Algorithm. NASA RP 1380, 50 pp.

   Conway, D. 2002. Advanced Microwave Scanning Radiometer - EOS Quality 
   Assurance Plan. Huntsville, AL: Global Hydrology and Climate Center. Eppler, 
   D. T. and 14 others. 1992. Passive Microwave Signatures of Sea Ice, in 
   Microwave Remote Sensing of Ice. Geophysical Monograph Series 68: 47-71. AGU, 
   Washington, D.C.

   Fraser R. S., Gaut, N. E., Reifenstein, E. C., and H. Sievering. 1975. 
   Interaction Mechanisms Within the Atmosphere Including the Manual of Remote 
   Sensing. American Society of Photogrammetry 181-233. Falls Church, VA.

   Gloersen P. and D.J. Cavalieri. 1986. Reduction of weather effects in the 
   calculation of sea ice concentration from microwave radiances. Journal of 
   Geophysical Research 91(C3):3913-3919.

   Kelly, R. E., A. T. C. Chang, L. Tsang, and J. L. Foster. 2003. A Prototype 
   AMSR-E Global Snow Area and Snow Depth Algorithm. IEEE Transactions Geoscience 
   Remote Sensing 41: 230-242.

   Kummerow, C. 1993. On the accuracy of the Eddington approximation for 
   radiative transfer in the microwave frequencies. Journal of Geophysical 
   Research 98: 2757-2765. Markus, Thorsten and Donald J. Cavalieri. 2008. 
   Supplement AMSR-E Algorithm Theoretical Basis Document: Sea Ice Products. 
   Greenbelt, MD, USA: Goddard Space Flight Center. (view pdf)

   Markus, T. and D. Cavalieri. 1998. Snow depth distribution over sea ice in the 
   Southern Ocean from satellite passive microwave data. Antarctic Sea Ice: 
   Physical Processes, Interactions, and Variability. Antarctic Research Series 
   74:19-39. Washington, DC, USA: American Geophysical Union. 

   Markus, T., and D. Cavalieri. 2000. An enhancement of the NASA Team sea ice 
   algorithm. IEEE Transactions on Geoscience and Remote Sensing 38: 1387-1398.  
   Matzler, C., R. O. Ramseier, and E. Svendsen. 1984. Polarization Effects in 
   Sea-ice Signatures. IEEE Journal of Oceanic Engineering 9: 333-338.

   Pearson, F. 1990. Map projections: Theory and applications. CRC Press. Boca 
   Raton, Florida. 372 pages.

   Snyder, J.P. 1987. Map projections - a working manual. U.S. Geological Survey 
   Professional Paper 1395. U.S. Government Printing Office. Washington, D.C. 383 
   pages.

   Snyder, J. P. 1982. Map Projections Used by the U.S. Geological Survey. U.S. 
   Geological Survey Bulletin 1532.

   
For more information regarding related publications, see the Research Using 
   AMSR-E Data Web page.

End_Group
Group: Summary

   The Advanced Microwave Scanning Radiometer - Earth Observing System (AMSR-E) 
   instrument on the NASA Earth Observing System (EOS) Aqua satellite, provides 
   global passive microwave measurements of land, ocean, and atmospheric 
   variables for the investigation of water and energy cycles.

   This Level-3 gridded product (AE_SI12) includes brightness temperatures at 
   18.7 through 89.0 GHz, sea ice concentration, and snow depth over sea ice. 
   Data are mapped to a polar stereographic grid at 12.5 km spatial resolution. 
   Sea ice concentration and brightness temperatures include daily ascending 
   averages, daily descending averages, and daily averages; snow depth over sea 
   ice data is a five-day running average. Data are stored in HDF-EOS format and 
   are available from 19 June 2002 to present via FTP.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/amsre/
   Description: AMSR-E Data at NSIDC
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/amsre/index.html
   Description: AMSR-E web site at NSIDC
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://wwwghcc.msfc.nasa.gov/AMSR/
   Description: NASA AMSR-E web site
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 Products at NSIDC
End_Group
IDN_Node: AMD, CEOS, ARCTIC
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2003-01-01
Last_DIF_Revision_Date: 2014-04-16
DIF_Revision_History:  added doi