Entry_ID: NSIDC-0116
Entry_Title: Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors
Group: Data_Set_Citation
   Dataset_Creator: Fowler, C., W. Emery, and M. Tschudi. 
   Dataset_Title: Polar Pathfinder Daily 25 km EASE-Grid Sea Ice Motion Vectors
   Dataset_Release_Date: 2013-10-31
   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/nsidc-0116.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: Mark
   Last_Name: Tschudi
   Email: mark.tschudi@colorado.edu
   Group: Contact_Address
      Address: University of Colorado
      Address: Colorado Center for Astrodynamics Research (CCAR)
      Address: 431 UCB

      City: Boulder
      Province_or_State: Colorado
      Postal_Code: 80309-0431
      Country: USA
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Charles
   Last_Name: Fowler
   Group: Contact_Address
      Address: University of Colorado at Boulder
      City: Boulder
      Province_or_State: CO
      Country: USA
   End_Group
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
   Detailed_Variable: Ice Velocity
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
   Detailed_Variable: Ice Velocity
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
   Detailed_Variable: Ice Velocity
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
   Detailed_Variable: Ice Velocity
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Ocean Winds
   Variable_Level_1: Surface Winds
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Ocean Winds
   Variable_Level_1: Surface Winds
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Ocean Winds
   Variable_Level_1: Surface Winds
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Ocean Winds
   Variable_Level_1: Surface Winds
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
   Detailed_Variable: Ice Velocity
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
   Detailed_Variable: Ice Velocity
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
   Detailed_Variable: Ice Velocity
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
   Detailed_Variable: Ice Velocity
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Oceans
   Term: Sea Ice
   Variable_Level_1: Sea Ice Motion
End_Group
ISO_Topic_Category: Climatology/Meteorology/Atmosphere
Keyword: AMSR-E
Keyword: AVHRR
Keyword: Buoys
Keyword: DAAC
Keyword: EOSDIS
Keyword: Gridded
Keyword: Gridded Data
Keyword: Ice Motion
Keyword: NASA
Keyword: NASA Pathfinder
Keyword: NCEP/NCAR Reanalysis Data
Keyword: NOAA/NASA Pathfinder
Keyword: NSIDC
Keyword: Passive Microwave
Keyword: Passive Microwave Data
Keyword: Remote Sensing
Keyword: Sea Ice Motion
Keyword: Sea Ice Velocity
Keyword: Sea Surface Wind Speeds
Keyword: SMMR
Keyword: SSM/I
Keyword: SSMIS
Keyword: Surface Winds
Keyword: wind velocity as vectors
Sensor_Name: AMSR-E > Advanced Microwave Scanning Radiometer-EOS
Sensor_Name: AVHRR > Advanced Very High Resolution Radiometer
Sensor_Name: DRIFTING BUOYS
Sensor_Name: SMMR > Scanning Multichannel Microwave Radiometer
Sensor_Name: SSM/I > Special Sensor Microwave/Imager
Sensor_Name: SSMIS > Special Sensor Microwave Imager/Sounder
Source_Name: AQUA > Earth Observing System, AQUA
Source_Name: BUOYS
Source_Name: DMSP 5D-2/F11 > Defense Meteorological Satellite Program-F11
Source_Name: DMSP 5D-2/F13 > Defense Meteorological Satellite Program-F13
Source_Name: DMSP 5D-2/F8 > Defense Meteorological Satellite Program-F8
Source_Name: DMSP 5D-3/F17 > Defense Meteorological Satellite Program-F17
Source_Name: NIMBUS-7
Source_Name: NOAA-11 > National Oceanic & Atmospheric Administration-11
Source_Name: NOAA-12 > National Oceanic & Atmospheric Administration-12
Source_Name: NOAA-14 > National Oceanic & Atmospheric Administration-14
Source_Name: NOAA-9 > National Oceanic & Atmospheric Administration-9
Group: Temporal_Coverage
   Start_Date: 1978-10-25
   Stop_Date: 2012-12-31
End_Group
Data_Set_Progress: complete
Group: Spatial_Coverage
   Southernmost_Latitude: -90
   Northernmost_Latitude: -53.2028
   Westernmost_Longitude: -180
   Easternmost_Longitude: 180
End_Group
Group: Spatial_Coverage
   Southernmost_Latitude: 48.4
   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: Location
   Location_Category: OCEAN
   Location_Type: ARCTIC OCEAN
End_Group
Group: Data_Resolution
   Latitude_Resolution: 25 km
   Longitude_Resolution: 25 km
End_Group
Project: ESIP > Earth Science Information Partners Program
Project: NOAA/NASA PATHFINDER > NOAA/NASA Pathfinder Program
Group: Quality

   Quality information for this data set varies by sensor. Refer to the data set 
   guide documentation for accuracy estimates of ice motion from each type of 
   sensor.

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: 29 - 36 KB
   Distribution_Format: PNG
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 604 - 764 KB
   Distribution_Format: Binary
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 521 - 712 KB
   Distribution_Format: Photoshop
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 14 - 319 KB
   Distribution_Format: ASCII Text (.txt)
End_Group
Group: Reference

   Cracknell, A. 1997. The Advanced Very High Resolution Radiometer. London: 
   Taylor and Francis.

   Emery, W., C. Fowler, and J. Maslanik. 1995. Satellite Remote Sensing of Ice 
   Motion, in Oceanographic Applications of Remote Sensing, ed. Motoyoshi Ikeda 
   and Frederic W. Dobson. CRC Press, Boca Raton.

   Isaaks, E., and R. M. Srivastava. 1989. An Introduction to Applied 
   Geostatistics. New York: Oxford University Press.

   Kalnay, E., M. Kanamitsu, R. Kistler, W. Collins, D. Deaven, L. Gandin, M. 
   Iredell, S. Saha, G. White, J. Woollen, Y. Zhu, A. Leetmaa, R. Reynolds, M. 
   Chelliah, W. Ebisuzaki, W. Higgins, J. Janowiak, K. Mo, C. Ropelewski, J. 
   Wang, R. Jenne, and D. Joseph. 1996. The NCEP/NCAR 40-Year Reanalysis Project. 
   Bulletin of the American Meteorological Society, 77, 437–471.

   Kidwell, K. 1995. NOAA Polar Orbiter Data User's Guide. U.S. Dept. of 
   Commerce, National Oceanic and Atmospheric Administration, NESDIS.

   Krasnopolsky, V. M., L. C. Breaker, and W. H. Gemmill. 1995. A Neural Network 
   as a Nonlinear Transfer Function Model for Retrieving Surface Wind Speeds from 
   the Special Sensor Microwave Imager. Journal of Geophysical Research, 100(C6), 
   11,033–11,045. PDF

   Maslanik, J., C. Fowler, J. Key, T. Scambos, T. Hutchinson, and W. Emery. 
   1998. AVHRR-based Polar Pathfinder Products for Modeling Applications. Annals 
   of Glaciology 25:388-392

   Rosborough, G., D. Baldwin, and W. Emery. 1994. Precise AVHRR Image 
   Navigation. IEEE Transactions in Geosciences and Remote Sensing 32(3):644-657.

   Schweiger, A., C. Fowler, J. Key, J. Maslanik, J. Francis, R. Armstrong, M. J. 
   Brodzik, T. Scambos, T. Haran, M. Ortmeyer, S. Khalsa, D. Rothrock, and R. 
   Weaver. 1999. P-Cube: A Multisensor Data Set for Polar Climate Research. 
   Proceedings on the 5th Conference on Polar Meteorology and Oceanography, 
   American Meteorological Society, Dallas, TX, 15-20 Jan., 136-141.

   Thorndike, A. S., and R. Colony. 1982. Sea Ice Motion in Response to 
   Geostrophic Winds. J. Geophys. Res. 87(C8):5845–5852, 
   doi:10.1029/JC087iC08p05845.

End_Group
Group: Summary

   

Note: An error in the computation of ice motion during the period 1 Nov 1978 – 8 Jul 1987 is being investigated. During this period, a parameter file that sets the search criteria for SMMR observations is likely incorrect. A new version of this file with adjusted parameters to match SMMR criteria is being tested. If you have questions or concerns, please contact NSIDC User Services.

Daily ice motion vectors are computed from a wide variety of sensors ranging from passive microwave radiometers, such as the Scanning Multichannel Microwave Radiometer (SMMR), to International Arctic Buoy Programme (IABP) buoy data. Daily gridded fields combine data from all sensors, from November 1978 through December 2012. Grids extend from 48.4° N to 90° N, and from 53.2° S to 90° S. Mean gridded fields include yearly, monthly, and weekly means, and a mean for the entire time series. Both daily and mean gridded fields are in 2-byte integer format, reprojected to 25 km Northern and Southern Hemisphere EASE-Grids. Browse images of mean fields are available in Portable Network Graphics (PNG) and Postscript (PS) formats. Raw ice motion vectors from each sensor are in tab-delimited ASCII text format. The complete data set is available via FTP. End_Group Group: Related_URL Group: URL_Content_Type Type: VIEW PROJECT HOME PAGE End_Group URL: http://nsidc.org/data/pathfinders/ Description: NOAA/NASA Polar Pathfinder Data End_Group IDN_Node: USA/NASA Metadata_Name: CEOS IDN DIF Metadata_Version: 9.7 DIF_Creation_Date: 2013-10-31 Last_DIF_Revision_Date: 2014-10-15 DIF_Revision_History: Minor change to summary no QC needed.