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  <Entry_ID>G02201</Entry_ID>
  <Entry_Title>International Polar Year Historical Data and Literature</Entry_Title>
  <Data_Set_Citation>
    <Dataset_Creator>Coburn, E., R. Duerr, E. Schlagel, and A. Wallace. </Dataset_Creator>
    <Dataset_Title>International Polar Year Historical Data and Literature</Dataset_Title>
    <Dataset_Release_Date>2011-08-01</Dataset_Release_Date>
    <Dataset_Release_Place>Boulder, Colorado USA</Dataset_Release_Place>
    <Dataset_Publisher>NSIDC: National Snow and Ice Data Center</Dataset_Publisher>
    <Online_Resource>http://nsidc.org/data/g02201.html</Online_Resource>
    <Dataset_DOI>http://dx.doi.org/10.7265/N5FT8HZS</Dataset_DOI>
  </Data_Set_Citation>
  <Personnel>
    <Role>Data Author</Role>
    <First_Name>Elizabeth</First_Name>
    <Last_Name>Coburn</Last_Name>
    <Email>coburn@nsidc.org</Email>
    <Contact_Address>
      <Address>Cooperative Institute for Research in Environmental Sciences, CU Boulder</Address>
      <Address>National Snow and Ice Data Center</Address>
    </Contact_Address>
  </Personnel>
  <Personnel>
    <Role>Data Author</Role>
    <First_Name>Ruth</First_Name>
    <Last_Name>Duerr</Last_Name>
    <Email>rduerr@nsidc.org</Email>
    <Phone>1 303 735-0136 x</Phone>
    <Contact_Address>
      <Address>Cooperative Institute for Research in Environmental Sciences, CU Boulder</Address>
      <Address>National Snow and Ice Data Center</Address>
      <Address>449 University of Colorado at Boulder</Address>
      <City>Boulder</City>
      <Province_or_State>Colorado</Province_or_State>
      <Postal_Code>80027</Postal_Code>
      <Country>USA</Country>
    </Contact_Address>
  </Personnel>
  <Personnel>
    <Role>Data Author</Role>
    <First_Name>Elizabeth</First_Name>
    <Last_Name>Schlagel</Last_Name>
    <Email>schlagel@nsidc.org</Email>
    <Contact_Address>
      <Address>Cooperative Institute for Research in Environmental Sciences, CU Boulder</Address>
      <Address>National Snow and Ice Data Center</Address>
    </Contact_Address>
  </Personnel>
  <Personnel>
    <Role>Data Author</Role>
    <First_Name>Allaina</First_Name>
    <Last_Name>Wallace</Last_Name>
    <Email>allainaw@nsidc.org</Email>
    <Contact_Address>
      <Address>Cooperative Institute for Research in Environmental Sciences, CU Boulder</Address>
      <Address>National Snow and Ice Data Center</Address>
    </Contact_Address>
  </Personnel>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Atmosphere</Topic>
    <Term>Aerosols</Term>
    <Variable_Level_1>Dust/Ash/Smoke</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Atmosphere</Topic>
    <Term>Aerosols</Term>
    <Variable_Level_1>Particulate Matter</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Atmosphere</Topic>
    <Term>Atmospheric Electricity</Term>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Atmosphere</Topic>
    <Term>Atmospheric Electricity</Term>
    <Variable_Level_1>Atmospheric Conductivity</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Atmosphere</Topic>
    <Term>Atmospheric Electricity</Term>
    <Variable_Level_1>Electric Field</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Atmosphere</Topic>
    <Term>Atmospheric Pressure</Term>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Atmosphere</Topic>
    <Term>Atmospheric Temperature</Term>
    <Variable_Level_1>Air Temperature</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Frozen Ground</Term>
    <Variable_Level_1>Periglacial Processes</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Frozen Ground</Term>
    <Variable_Level_1>Permafrost</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Glaciers/Ice Sheets</Term>
    <Variable_Level_1>Ablation Zones/Accumulation Zones</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Glaciers/Ice Sheets</Term>
    <Variable_Level_1>Glacier Elevation/Ice Sheet Elevation</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Glaciers/Ice Sheets</Term>
    <Variable_Level_1>Glaciers</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Glaciers/Ice Sheets</Term>
    <Variable_Level_1>Ice Sheets</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Sea Ice</Term>
    <Variable_Level_1>Ice Depth/Thickness</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Sea Ice</Term>
    <Variable_Level_1>Ice Growth/Melt</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Sea Ice</Term>
    <Variable_Level_1>Sea Ice Elevation</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Sea Ice</Term>
    <Variable_Level_1>Snow Depth</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Cryosphere</Topic>
    <Term>Snow/Ice</Term>
    <Variable_Level_1>Permafrost</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Land Surface</Topic>
    <Term>Frozen Ground</Term>
    <Variable_Level_1>Periglacial Processes</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Land Surface</Topic>
    <Term>Frozen Ground</Term>
    <Variable_Level_1>Permafrost</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Oceans</Topic>
    <Term>Ocean Temperature</Term>
    <Variable_Level_1>Water Temperature</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Oceans</Topic>
    <Term>Salinity/Density</Term>
    <Variable_Level_1>Salinity</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Oceans</Topic>
    <Term>Sea Ice</Term>
    <Variable_Level_1>Ice Depth/Thickness</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Oceans</Topic>
    <Term>Sea Ice</Term>
    <Variable_Level_1>Ice Growth/Melt</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Oceans</Topic>
    <Term>Sea Ice</Term>
    <Variable_Level_1>Sea Ice Elevation</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Oceans</Topic>
    <Term>Sea Ice</Term>
    <Variable_Level_1>Snow Depth</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Paleoclimate</Topic>
    <Term>Ice Core Records</Term>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Paleoclimate</Topic>
    <Term>Land Records</Term>
    <Variable_Level_1>Glaciation</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Solid Earth</Topic>
    <Term>Geomorphology</Term>
    <Variable_Level_1>Glacial Landforms/Processes</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Solid Earth</Topic>
    <Term>Seismology</Term>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Solid Earth</Topic>
    <Term>Seismology</Term>
    <Variable_Level_1>Seismic Profile</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Sun-earth Interactions</Topic>
    <Term>Ionosphere/Magnetosphere Dynamics</Term>
    <Variable_Level_1>Aurorae</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Sun-earth Interactions</Topic>
    <Term>Ionosphere/Magnetosphere Dynamics</Term>
    <Variable_Level_1>Electric Fields/Electric Currents</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Sun-earth Interactions</Topic>
    <Term>Solar Activity</Term>
    <Variable_Level_1>Cosmic Rays</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Sun-earth Interactions</Topic>
    <Term>Solar Activity</Term>
    <Variable_Level_1>Solar Flares</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Sun-earth Interactions</Topic>
    <Term>Solar Activity</Term>
    <Variable_Level_1>Solar Radio Wave Emissions</Variable_Level_1>
  </Parameters>
  <Parameters>
    <Category>EARTH SCIENCE</Category>
    <Topic>Terrestrial Hydrosphere</Topic>
    <Term>Snow/Ice</Term>
    <Variable_Level_1>Permafrost</Variable_Level_1>
  </Parameters>
  <ISO_Topic_Category>Climatology/Meteorology/Atmosphere</ISO_Topic_Category>
  <Sensor_Name>
    <Short_Name>BALANCE</Short_Name>
  </Sensor_Name>
  <Sensor_Name>
    <Short_Name>CAMERAS</Short_Name>
  </Sensor_Name>
  <Sensor_Name>
    <Short_Name>COMPASSES</Short_Name>
  </Sensor_Name>
  <Sensor_Name>
    <Short_Name>HYGROTHERMOGRAPHS</Short_Name>
  </Sensor_Name>
  <Sensor_Name>
    <Short_Name>INTERFEROMETERS</Short_Name>
  </Sensor_Name>
  <Sensor_Name>
    <Short_Name>MAGVAR</Short_Name>
    <Long_Name>Magnetic Variometer</Long_Name>
  </Sensor_Name>
  <Sensor_Name>
    <Short_Name>MULTILENS CAMERAS</Short_Name>
  </Sensor_Name>
  <Sensor_Name>
    <Short_Name>THERMOMETERS</Short_Name>
  </Sensor_Name>
  <Sensor_Name>
    <Short_Name>VISUAL OBSERVATIONS</Short_Name>
  </Sensor_Name>
  <Source_Name>
    <Short_Name>AIRCRAFT</Short_Name>
  </Source_Name>
  <Source_Name>
    <Short_Name>GROUND-BASED OBSERVATIONS</Short_Name>
  </Source_Name>
  <Source_Name>
    <Short_Name>GROUND STATIONS</Short_Name>
  </Source_Name>
  <Temporal_Coverage>
    <Start_Date>1882-01-01</Start_Date>
    <Stop_Date>2007-12-31</Stop_Date>
  </Temporal_Coverage>
  <Data_Set_Progress>complete</Data_Set_Progress>
  <Spatial_Coverage>
    <Southernmost_Latitude>-90</Southernmost_Latitude>
    <Northernmost_Latitude>90</Northernmost_Latitude>
    <Westernmost_Longitude>-180</Westernmost_Longitude>
    <Easternmost_Longitude>180</Easternmost_Longitude>
  </Spatial_Coverage>
  <Location>
    <Location_Category>CONTINENT</Location_Category>
    <Location_Type>ANTARCTICA</Location_Type>
  </Location>
  <Location>
    <Location_Category>CONTINENT</Location_Category>
    <Location_Type>NORTH AMERICA</Location_Type>
    <Location_Subregion1>CANADA</Location_Subregion1>
  </Location>
  <Location>
    <Location_Category>CONTINENT</Location_Category>
    <Location_Type>NORTH AMERICA</Location_Type>
    <Location_Subregion1>GREENLAND</Location_Subregion1>
  </Location>
  <Location>
    <Location_Category>CONTINENT</Location_Category>
    <Location_Type>NORTH AMERICA</Location_Type>
    <Location_Subregion1>MEXICO</Location_Subregion1>
  </Location>
  <Location>
    <Location_Category>CONTINENT</Location_Category>
    <Location_Type>NORTH AMERICA</Location_Type>
    <Location_Subregion1>UNITED STATES OF AMERICA</Location_Subregion1>
    <Location_Subregion2>ALASKA</Location_Subregion2>
  </Location>
  <Location>
    <Location_Category>CONTINENT</Location_Category>
    <Location_Type>NORTH AMERICA</Location_Type>
    <Location_Subregion1>UNITED STATES OF AMERICA</Location_Subregion1>
    <Location_Subregion2>CALIFORNIA</Location_Subregion2>
  </Location>
  <Location>
    <Location_Category>CONTINENT</Location_Category>
    <Location_Type>NORTH AMERICA</Location_Type>
    <Location_Subregion1>UNITED STATES OF AMERICA</Location_Subregion1>
    <Location_Subregion2>MICHIGAN</Location_Subregion2>
  </Location>
  <Location>
    <Location_Category>CONTINENT</Location_Category>
    <Location_Type>SOUTH AMERICA</Location_Type>
  </Location>
  <Location>
    <Location_Category>CONTINENT</Location_Category>
    <Location_Type>SOUTH AMERICA</Location_Type>
    <Location_Subregion1>CHILE</Location_Subregion1>
  </Location>
  <Location>
    <Location_Category>GEOGRAPHIC REGION</Location_Category>
    <Location_Type>ARCTIC</Location_Type>
  </Location>
  <Location>
    <Location_Category>OCEAN</Location_Category>
    <Location_Type>ARCTIC OCEAN</Location_Type>
  </Location>
  <Location>
    <Location_Category>OCEAN</Location_Category>
    <Location_Type>SOUTHERN OCEAN</Location_Type>
    <Location_Subregion1>ROSS SEA</Location_Subregion1>
  </Location>
  <Access_Constraints>Copyrighted material are subject to fair use restrictions.</Access_Constraints>
  <Use_Constraints>Publications, images, data files, and other materials from the National Snow and Ice Data Center, the National Center for Atmospheric Research, the Institute of Arctic and Alpine Research, and the University of Colorado holdings are available to the public if cited correctly using NSIDC's Use and Copyright Policies.  The image holdings (photographs) of the Carnegie Institution for Science in Washington, D.C. are available for preview only but may be made available upon request.</Use_Constraints>
  <Data_Set_Language>English</Data_Set_Language>
  <Originating_Center>NSIDC_ARC</Originating_Center>
  <Data_Center>
    <Data_Center_Name>
      <Short_Name>NSIDC</Short_Name>
      <Long_Name>National Snow and Ice Data Center</Long_Name>
    </Data_Center_Name>
    <Data_Center_URL>http://nsidc.org</Data_Center_URL>
    <Personnel>
      <Role>Data Center Contact</Role>
      <First_Name>NSIDC</First_Name>
      <Last_Name>User Services</Last_Name>
      <Email>nsidc@nsidc.org</Email>
      <Phone>1 303 492-6199 </Phone>
      <Fax>1 303  492-2468 </Fax>
      <Contact_Address>
        <Address>National Snow and Ice Data Center</Address>
        <Address>CIRES, 449 UCB</Address>
        <Address>University of Colorado</Address>
        <City>Boulder</City>
        <Province_or_State>CO</Province_or_State>
        <Postal_Code>80309-0449</Postal_Code>
        <Country>USA</Country>
      </Contact_Address>
    </Personnel>
  </Data_Center>
  <Data_Center>
    <Data_Center_Name>
      <Short_Name>NSIDC_NOAA</Short_Name>
      <Long_Name>NSIDC National Oceanic and Atmospheric Administration</Long_Name>
    </Data_Center_Name>
    <Data_Center_URL>http://nsidc.org/noaa/</Data_Center_URL>
    <Personnel>
      <Role>Data Center Contact</Role>
      <First_Name>NSIDC NOAA</First_Name>
      <Last_Name>User Services</Last_Name>
      <Email>nsidc@nsidc.org</Email>
      <Phone>1 303 492-6199 </Phone>
      <Fax>1 303  492-2468 </Fax>
      <Contact_Address>
        <Address>National Snow and Ice Data Center</Address>
        <Address>CIRES, 449 UCB</Address>
        <Address>University of Colorado</Address>
        <City>Boulder</City>
        <Province_or_State>CO</Province_or_State>
        <Postal_Code>80309-0449</Postal_Code>
        <Country>USA</Country>
      </Contact_Address>
    </Personnel>
  </Data_Center>
  <Data_Center>
    <Data_Center_Name>
      <Short_Name>NSIDC_ARC</Short_Name>
      <Long_Name>NSIDC Roger G. Barry Archives and Resource Center </Long_Name>
    </Data_Center_Name>
    <Data_Center_URL>http://nsidc.org/rocs/</Data_Center_URL>
    <Personnel>
      <Role>Data Center Contact</Role>
      <First_Name>NSIDC ARC</First_Name>
      <Last_Name>User Services</Last_Name>
      <Email>nsidc@nsidc.org</Email>
      <Phone>1 303 492-6199 x</Phone>
      <Fax>1 303  492-2468 x</Fax>
      <Contact_Address>
        <Address>National Snow and Ice Data Center CIRES, 449 UCB University of Colorado</Address>
        <City>Boulder</City>
        <Province_or_State>CO</Province_or_State>
        <Postal_Code>80309-0449</Postal_Code>
        <Country>USA</Country>
      </Contact_Address>
    </Personnel>
  </Data_Center>
  <Distribution>
    <Distribution_Media>FTP</Distribution_Media>
    <Distribution_Size>50 - 120 MB</Distribution_Size>
    <Distribution_Format>TIFF</Distribution_Format>
  </Distribution>
  <Distribution>
    <Distribution_Media>Online (HTTP)</Distribution_Media>
    <Distribution_Size>129 MB</Distribution_Size>
    <Distribution_Format>MPEG</Distribution_Format>
  </Distribution>
  <Distribution>
    <Distribution_Media>Online (HTTP)</Distribution_Media>
    <Distribution_Size>4 - 15 KB</Distribution_Size>
    <Distribution_Format>JPEG</Distribution_Format>
  </Distribution>
  <Distribution>
    <Distribution_Media>Online (HTTP)</Distribution_Media>
    <Distribution_Size>50 - 120 MB</Distribution_Size>
    <Distribution_Format>TIFF</Distribution_Format>
  </Distribution>
  <Distribution>
    <Distribution_Media>Online (HTTP)</Distribution_Media>
    <Distribution_Size>550 MB</Distribution_Size>
    <Distribution_Format>PDF</Distribution_Format>
  </Distribution>
  <Distribution>
    <Distribution_Media>Online (HTTP)</Distribution_Media>
    <Distribution_Size>90 - 120 MB</Distribution_Size>
    <Distribution_Format>MPEG</Distribution_Format>
  </Distribution>
  <Reference>Duerr, R., Parsons, M., Weaver, R. 2004. The International Polar Year: Making Data and Information Available for the Long Term. Presented at the AGU, San Francisco, CA, USA. 

Duerr, R., Howard, A. 2007. The International Polar Years: Creating Access to 125 Years of Polar Research. Presented at the Annual Conference of the Special Libraries Association. Denver, CO, USA.

Goodwin, R. et al. 2008. The International Polar Year Publications Database: A Progress Report. Presented at the 22nd Polar Libraries Colloquy, Edmonton, Canada. Goodwin, R., Tahirkheli, S., Lane, H., Duerr, R., Wallace, A., Dheerendra, P. T. 2010. The International Polar Year Publications Database: The First 4000. Presented at the 23rd Polar Libraries Colloquy, Bremerhaven, Germany. 

Hicks, G. 2010. Polar Libraries Using E-Science Communication During the 4th International Polar Year 2007-2008. Presented at the 23rd Polar Libraries Colloquy, Bremerhaven, Germany. 

Hicks, G., Sommer, S. 2006. International Polar Year Information Resources: Science Librarians Behind the Scenes and in the Field. Presented at the American Geophysical Union Fall Meeting, San Francisco, CA, USA.

Howard, A. 2007. The Reason for DAHLI: Making the Holdings of Historic IPY Information Accessible to All. Presented at the GSA Annual Meeting, Denver, CO, USA.

Howard, A. M., Duerr, R. 2006. Discovery and Access of Historic Literature of the IPYs (DAHLI): rescuing records and publications of early IPY ventures. Presented at the 21st Polar Libraries Colloquy, Rome, Italy. 

Howard, A., Duerr, R. 2006. NOAAs Climate Database Modernization Program at the National Snow and Ice Data Center. Presented at the 21st Polar Libraries Colloquy, Rome, Italy.</Reference>
  <Summary>The International Polar Year Historical Data and Literature collection (formerly known as the Discovery and Access of Historic Literature from the IPYs (DAHLI) project) is an online data collection consisting primarily of photographs, publications, and observational data records from, and relating to, the first two International Polar Years (IPY) 1882-83 and 1932-33 and the International Geophysical Year (IGY)1957-58. Examples of data contained in observational records include, but are not limited to: air  magnetic vertical intensity, air conductivity, atmospheric-electric observations, auroral log data,  potential-gradient electrographic data, dust counts, and meteorological observations.  Photographs  within the collection include those from the Wilkes Station in Antarctica, the USGS survey of Fletchers  Ice Island, and the DTM Geophysical Laboratory Library.  Publications within this collection primarily  consist of government (national and international) bulletins and reports on activities during the  International Polar and International Geophysical years.  Other data include audio files of interviews  recorded during NCARs Oral Histories Project, and a video on Drifting Station Alpha during the IGY,  published by NSIDC.

Data were contributed by several institutions:  the University of Colorado Libraries, the Carnegie  Institution of Washington, National Snow and Ice Data Center (NSIDC), and The National Center for  Atmospheric Research (NCAR). 

The data collection contains approximately 800 digital objects, formats of these objects include:  PDF,  TIFF, JPEG, MP3, and MPEG.  Most objects are freely accessible and downloadable, except where prohibited by  copyright.  

Temporal coverage of this data collection is between the years 1882 and 1958.  Geographical coverage  is global, with data originating from Europe, Asia, North America, and South America and relating  primarily to specific glaciers and other locations in North America (Alaska and Canada) and Antarctica.

All materials without use constraints are accessible by the public through the ROCS Archives Catalog.   Reference images and PDFs of publications and data are available for immediate viewing and download.  Please request high resolution TIFF image files through the &lt;a href="/rocs/archives- catalog/index.php"&gt;Archives catalog&lt;/a&gt;.</Summary>
  <Related_URL>
    <URL_Content_Type>
      <Type>VIEW PROJECT HOME PAGE</Type>
    </URL_Content_Type>
    <URL>http://www.nsidc.org/rocs/analog_archives/access.html</URL>
    <Description>Access ROCS Materials</Description>
  </Related_URL>
  <Related_URL>
    <URL_Content_Type>
      <Type>VIEW PROJECT HOME PAGE</Type>
    </URL_Content_Type>
    <URL>http://classic.ipy.org/development/history.htm</URL>
    <Description>History of the IPYs</Description>
  </Related_URL>
  <Related_URL>
    <URL_Content_Type>
      <Type>VIEW PROJECT HOME PAGE</Type>
    </URL_Content_Type>
    <URL>http://nsidc.org/rocs/analog_archives/access.html/</URL>
    <Description>ROCS: Accessing Materials</Description>
  </Related_URL>
  <Metadata_Name>CEOS IDN DIF</Metadata_Name>
  <Metadata_Version>9.7</Metadata_Version>
  <DIF_Creation_Date>2011-08-01</DIF_Creation_Date>
  <Last_DIF_Revision_Date>2013-04-02</Last_DIF_Revision_Date>
  <DIF_Revision_History>Changed the Originating Data Center from NSIDC_ROCS to NSIDC_ARC. </DIF_Revision_History>
</DIF>
