Other Distribution of MODIS Data

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Other Distribution of MODIS Data

• MODIS Land Collection 5 Workshop
• Jan. 17, 2007
• Robert Wolfe
• NASA GSFC Code 614.5

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Getting MODIS Data

• Order from DAAC through EOS Data Gateway
• response is a few hours
• services (e.g. subsetting) available for some
  products
• Get data from DAAC data pools
• most recently produced data are on-line and
  available via FTP
• Get data from other sources (LAADS, Science team
  sites, MODIS Rapid Response, direct broadcast,
  etc.)

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Other Distribution

• LAADS (L1 and Cloud Mask)
• MODIS Land Rapid Response
• UMD Fire Mapper
• GLCF (VCC, VCF)
• Boston U. (Albedo Land Cover CMGs)
• Montana (NPP improved)
• etc ...

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MODLAND Websitehttp//modis-land.gsfc.nasa.gov/
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Quick LAADS Web Tour
http//ladsweb.nascom.nasa.gov/
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Browsing the Image Archive
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Search and Order
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Geographic and Parameter Subsetting

• Allows for custom design of delivered products,
  reducing bandwidth and researcher storage
  requirements
• Parameter subsetting particularly valuable for
  fat Level-3 Atmosphere products
• Involves some delay for file preparation, but
  runs rapidly in a disk-to-disk environment
• Subsetting engine is prototype for future
  custom products

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Ordering and Acquiring Data

• Availability
• L1 Atmosphere products immediately available by
  ftp
• Search and order will stage data immediately
• Exceptions
• Only last 30 days of L1B data online (request by
  POD)
• Post-processing is needed to subset by parameter
  (SDS) or geography

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LAADS FTP Access

• Directory structure
• allData/ltcollectiongt/ltproduct_namegt/
  ltyeargt/ltday_of_yeargt/ltfile_namegt
• Example
• ftp//ladsweb.nascom.nasa.gov/allData/5/MOD35_L2
  /2007/008/MOD35_L2.A2007008.0710.005.200700917362
  2.hdf
• ? Collection 5 Cloud mask Jan. 8, 2007 Granule
  0710

ftp//ladsweb.nascom.nasa.gov/
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UMD Fire Mapper

• Active fires
• Email alerts
• Subsets

http//http//maps.geog.umd.edu/
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MODIS Land Rapid Response

• Browse-and-click interface
• Calendar-based layout
• Multiple spatial resolutions, multiple band
  combinations, multiple products
• Gallery images keyword-searchable and
  georeferenced (world file available for GIS
  users)
• Link to L1 data at the LAADS

http//ladsweb.nascom.nasa.gov/
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UMD Global Land Cover Facility (GLCF)

• MODIS VCC and VCF

Goodes and Geo Projs
http//glcf.umiacs.umd.edu/data/modis
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Boston University

• BRDF/Albedo
• Land Cover and Dynamics
• CMG products in Binary Format

http//www-modis.bu.edu/
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U. Montana NPP

• Improved NPP product
• ftp access
• tiles and geotiff mosaics

http//www.ntsg.umt.edu/modis/
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http//modis-land.gsfc.nasa.gov/
Questions?