Entry_ID: MYD10_L2
Entry_Title: MODIS/Aqua Snow Cover 5-Min L2 Swath 500m
Group: Data_Set_Citation
   Dataset_Creator: Hall, D. K., V. V. Salomonson, and G. A. Riggs. 
   Dataset_Title: MODIS/Aqua Snow Cover 5-Min L2 Swath 500m
   Dataset_Release_Date: 2006-12-18
   Dataset_Release_Place: Boulder, Colorado USA
   Dataset_Publisher: NSIDC: National Snow and Ice Data Center
   Version: 5
   Online_Resource: http://nsidc.org/data/myd10_l2.html
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Dorothy
   Middle_Name: K.
   Last_Name: Hall
   Group: Contact_Address
      Address: NASA Goddard Space Flight Center (GSFC)
      Address: National Aeronautics and Space Administration (NASA) Goddard Space Flight Center (GSFC)
      Address: Mail stop 614.1
      City: Greenbelt
      Province_or_State: MD
      Postal_Code: 20771
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: Vince
   Middle_Name: V.
   Last_Name: Salomonson
   Email: vincent.salomonson@utah.edu
   Phone: 1 801 585-9492 
   Group: Contact_Address
      Address: University of Utah
      Address: Department of Meteorology
      Address: University of Utah
      Address: Department of Meteorology
      Address: 135 S 1460 E, Rm 809
      City: Salt Lake City
      Province_or_State: UT
      Postal_Code: 84112
      Country: US
   End_Group
End_Group
Group: Personnel
   Role: Investigator
   First_Name: George
   Middle_Name: A.
   Last_Name: Riggs
   Email: George.A.Riggs@nasa.gov
   Phone: 1 301 614-5650 
   Group: Contact_Address
      Address: NASA Goddard Space Flight Center (GSFC)
      Address: Science Systems and Applications, Inc.
      Address: NASA Goddard Space Flight Center (GSFC)
      Address: Science Systems and Applications, Inc.
      Address: Code 614.1
      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: Snow/Ice
   Variable_Level_1: Lake Ice
   Detailed_Variable: Fractional Snow Cover
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Cryosphere
   Term: Snow/Ice
   Variable_Level_1: Lake Ice
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: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Lake Ice
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Cover
   Detailed_Variable: Fractional Snow Cover
End_Group
Group: Parameters
   Category: EARTH SCIENCE
   Topic: Terrestrial Hydrosphere
   Term: Snow/Ice
   Variable_Level_1: Snow Cover
End_Group
ISO_Topic_Category: Imagery/Base Maps/Earth Cover
Keyword: Antarctic
Keyword: Arctic
Keyword: Climatology
Keyword: DAAC
Keyword: ECS
Keyword: EOSDIS
Keyword: EOS PM-1
Keyword: Global Change
Keyword: Lake Ice
Keyword: NASA
Keyword: NSIDC
Keyword: Polar
Keyword: Remote Sensing
Keyword: Snow
Keyword: Snow Cover
Keyword: Snow On Ice
Keyword: Swath
Sensor_Name: MODIS > Moderate-Resolution Imaging Spectroradiometer
Sensor_Name: SPECTRORADIOMETERS
Source_Name: AQUA > Earth Observing System, AQUA
Group: Temporal_Coverage
   Start_Date: 2002-07-04
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: GEOGRAPHIC REGION
   Location_Type: GLOBAL LAND
End_Group
Group: Data_Resolution
   Latitude_Resolution: 500 m
   Longitude_Resolution: 500 m
   Temporal_Resolution: 00:05:00
End_Group
Project: EOSDIS > Earth Observing System Data Information System
Project: ESIP > Earth Science Information Partners Program
Group: Quality

   Quality indicators for MODIS snow data can be found in three places:

       * AutomaticQualityFlag and the ScienceQualityFlag metadata objects and 
   their corresponding explanations: AutomaticQualityFlagExplanation and 
   ScienceQualityFlagExplanation located in the CoreMetadata.0 global attributes  
   * Custom local attributes associated with each SDS, for example snow cover * 
   Snow Cover Pixel QA data field.

   These quality indicators are generated during production or in post-production 
   scientific and quality checks of the data product. For more information on 
   local and global attributes, go to one of the following links:

       * MOD10L2 and MYD10L2 Local Snow Cover Attributes, Version 5     * MOD10L2 
   and MYD10L2 Global Attributes, Version 5

   The AutomaticQualityFlag is automatically set according to conditions for 
   meeting data criteria in the snow mapping algorithm. In most cases, the flag 
   is set to either Passed or Suspect, and in rare instances, it may be set to 
   Failed. Suspect means that a significant percentage of the data were anomalous 
   and that further analysis should be done to determine the source of anomalies. 
   The AutomaticQualityFlagExplanation contains a brief message explaining the 
   reason for the setting of the AutomaticQualityFlag. The ScienceQualityFlag and 
   the ScienceQualityFlagExplanation maybe updated after production, either after 
   an automated QA program is run or after the data product is inspected by a 
   qualified snow scientist. Content and explanation of this flag are dynamic so 
   it should always be examined if present in the external metadata file.

   The snow algorithm identifies missing data and reports them in the output 
   product. Certain expected anomalous conditions may exist with the input data 
   such as a few missing lines or unusable data from the MODIS sensor. In these 
   cases, the snow algorithm makes no snow decision for an affected pixel. 
   Summary statistics are calculated for these conditions and reported as Valid 
   EV Obs Band x percent and Saturated EV Obs Band 1 percent local attributes 
   Riggs, Hall, and Salomonson 2006). In addition to these data values, the 
   product contains quality information at the pixel level.

   The Snow Cover Pixel QA data field provides additional information on 
   algorithm results for each pixel within a MODIS scene and is used as a measure 
   of usefulness for snow-cover data. The QA data are stored as coded integer 
   values and tell if algorithm results were nominal, abnormal, or if other 
   defined conditions were encountered for a pixel (Riggs, Hall, and Salomonson 
   2006). For example, intermediate checks for theoretical bounding of 
   reflectance data and the NDSI ratio are made in the algorithm. In theory, 
   reflectance values should lie within the 0-100 percent range, and the NDSI 
   ratio should lie within the -1.0 to +1.0 range. Summary statistics are kept 
   for pixels that exceed these theoretical limits; however, the test for snow is 
   done regardless of violations of these limits.

   The NASA Goddard Space Flight Center: MODIS Land Quality Assessment Web site 
   provides updated quality information for each product.

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: 0.5 - 10 MB
   Distribution_Format: HDF-EOS
End_Group
Group: Distribution
   Distribution_Media: FTP
   Distribution_Size: 0.5 - 10 MB
   Distribution_Format: Geographic Tagged Image File Format (GeoTIFF) (.geotiff)
End_Group
Group: Multimedia_Sample
   File: http://nsidc.org/data/modis/images/myd10_l2.2004015.sample.gif
   Caption: Sample Image
   Description: MYD10_L2 Version 4 Data, 15 January 2004
End_Group
Group: Multimedia_Sample
   File: http://nsidc.org/data/modis/images/myd10_l2.2004015.sample.gif
   Caption: MYD10_L2 Version 4 Data, 15 January 2004
End_Group
Group: Reference

   Diner, D. J., J. V. Martonchik, C. Borel, S. A. W. Gerstl, H. R. Gordon, Y. 
   Knyazikhin, R. Myneni, B. Pinty, and M. M. Verstraete. 1999. MISR Level-2 
   Surface Retrieval Algorithm Theoretical Basis Document. Pasadena, CA: Jet 
   Propulsion Laboratory.

   
Earth Science Data and Information System (ESDIS). 1996. EOS Ground System 
   (EGS) Systems and Operations Concept. Greenbelt, MD: Goddard Space Flight 
   Center.

   
Hall, Dorothy K., J. L. Foster, D. L. Verbyla, A. G. Klein, and C. S. Benson. 
   1998. Assessment of Snow Cover Mapping Accuracy in a Variety of Vegetation 
   Cover Densities in Central Alaska. Remote Sensing of the Environment 66:129-137.

   
Hall, Dorothy K. and J. Martinec. 1985. Remote Sensing of Ice and Snow. 
   London: Chapman and Hall.

   
Hall, Dorothy K., George A. Riggs, and Vincent V. Salomonson. September 
   2001a. Algorithm Theoretical Basis Document (ATBD) for the MODIS Snow-, Lake 
   Ice- and Sea Ice-Mapping Algorithms. Greenbelt, MD: Goddard Space Flight Center.

   
Hall, Dorothy K., J. L. Foster, Vincent V. Salomonson, A. G. Klein, and J. Y. 
   L. Chien. 2001b. Development of a Technique to Assess Snow-Cover Mapping 
   Accuracy From Space. IEEE Transactions on Geoscience and Remote Sensing 
   39(2):232-238.

   
Hapke, B. 1993. Theory of Reflectance and Emittance Spectroscopy. Cambridge: 
   Cambridge University Press.  Klein, A. MODIS Snow Albedo Prototype. 2003.

   
Klein, A. G., and Julienne. Stroeve. 2002. Development and Validation of a 
   Snow Albedo Algorithm for the MODIS Instrument. Annals of Glaciology 34:45-52. 

   
Klein, A. G., Dorothy K. Hall, and George A. Riggs. 1998. Improving 
   Snow-Cover Mapping in Forests Through the Use of a Canopy Reflectance Model. 
   Hydrologic Processes 12(10-11):1723-1744. 

   Markham, B. L. and J. L. Barker. 1986. Landsat MSS and TM Post-Calibration 
   Dynamic Ranges, Exoatmospheric Reflectances and At-Satellite Temperatures. 
   EOSAT Technical Notes 1:3-8.

   
MODIS Characterization and Support Team (MCST). 2000. MODIS Level-1B Product 
   User's Guide for Level-1B Version 2.3.x Release 2. MCST Document 
   #MCM-PUG-01-U-DNCN.

   
Pearson II, F. 1990. Map Projections: Theory and Applications. Boca Raton, 
   FL: CRC Press, Inc.

   
Riggs, George A., Dorothy K. Hall, and Vincent V. Salomonson. January 2003. 
   MODIS Snow Products User Guide for Collection 4 Data Products.

   
Riggs, George A., Dorothy K. Hall, and Vincent V. Salomonson. December 2006. 
   MODIS Snow Products User Guide to Collection 5. PDF 
   http://nsidc.org/data/docs/daac/modis_v5/dorothy_snow_doc.pdf. 2.8 MB.

    Wiscombe, W. J. and S. G. Warren. 1980. A Model for the Spectral Albedo of 
   Snow I: Pure Snow. Journal of the Atmospheric Sciences 37:2712-2733.

End_Group
Group: Summary

   The MODIS/Aqua Snow Cover 5-Min L2 Swath 500m (MYD10_L2) data set contains 
   snow cover and Quality Assessment (QA) data, latitudes and longitudes in 
   compressed Hierarchical Data Format-Earth Observing System (HDF-EOS) format, 
   and corresponding metadata. Latitude and longitude geolocation fields are at 5 
   km resolution while all other fields are at 500 m resolution. Version 5 
   (V005), the latest version of the Moderate Resolution Imaging 
   Spectroradiometer (MODIS) data available has two separate snow fields. The 
   first field, snow cover, classifies each cloud-free land or inland water body 
   pixel as snow-covered or snow-free, the second field, fractional snow cover, 
   provides the percent of snow cover within each pixel for land and inland water 
   bodies. MODIS snow cover data are based on a snow mapping algorithm that 
   employs a Normalized Difference Snow Index (NDSI) and other criteria tests.

End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/daac/modis/
   Description: MODIS DAAC page at NSIDC
End_Group
Group: Related_URL
   Group: URL_Content_Type
      Type: VIEW PROJECT HOME PAGE
   End_Group
   URL: http://nsidc.org/data/modis/
   Description: MODIS Data at NSIDC
End_Group
Metadata_Name: CEOS IDN DIF
Metadata_Version: 9.7
DIF_Creation_Date: 2006-12-18
Last_DIF_Revision_Date: 2013-11-14
DIF_Revision_History: Removed data disruption notice.