G. Bryan Bailey

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Ordering ASTER Data and Products from the Land
Processes DAAC

• G. Bryan Bailey
• Bhaskar Ramachandran
• Zheng Zhang
• USGS EROS Data Center
• Sioux Falls, SD 57198

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Presentation Outline

• LP DAAC Overview Bryan
  Bailey
• Historical and Functional Perspective
• Role with ASTER Data and Products
• Policy Considerations/Changes
• ASTER Data and Product Distribution Statistics
• Ordering ASTER Data and Products Bhaskar
  Ramachandran
• Routine
• On-Demand
• User Support Information Zheng Zhang
• DAAC User Services Functions
• Frequently Asked Questions

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LP DAAC Historical and Functional Perspective

• NASAs Earth Observing System EOS is comprised of
  three main parts...
• Space Measurement System
• EOS Data and Information System (EOSDIS)
• Scientific Research Program
• The LP DAAC is one of eight NASA DAACs that are
  key components of the EOSDIS.
• The primary functions of the DAACs are to
  process, archive, and distribute EOS data and
  products. DAACs also have important user
  support responsibilities.
• The EOS Data Gateway (EDG) is the principal tool
  for users to access EOS data and products.

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LP DAAC Role with ASTER Data and Products

• Receive (via tape) L1A L1B data from Japan, and
  then ingest and archive those data.
• Distribute L1A L1B data to users who order via
  the EDG.
• On demand (i.e., when ordered by a user), produce
  and distribute (via ftp) higher-level ASTER
  standard data products. The ASTER DEM is
  archived and can be ordered via the EDG.
• Support users of ASTER data and products.
• Other Responsibilities
• Host and operate the ASTER Expedited Data System.
• Host and support the ASTER Data Acquisition
  Request (DAR) Tool.
• Supplementary L1B data and L1B browse production.

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ASTER Data Flow
TDRSS White Sands
TERRA Satellite
Expedited Stream
Production Stream
Goddard DAAC
EOS Data Operations
ASTER GDS - Japan
LP DAAC at EDC
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Policy Considerations/Changes L1B Production

• Producing L1B data is not a primary role of the
  LP DAAC.
• However, the original L1B production strategy
  defined by the U.S. and Japan resulted in fewer
  L1B data sets being produced from L1A data than
  many users hoped would be available.
• Consequently, the LP DAAC recently implemented a
  system for supplementary production of L1B data.
  The DAAC will -
• generate L1Bs from L1As acquired prior to
  February 1, 2002.
• generate L1Bs only from L1As for which no
  GDS-produced L1B exists.
• At the same time, the DAAC implemented a
  capability to generate a higher-resolution browse
  image for L1B data. Eventually, all L1B data
  available from the LP DAAC will have associated
  700 x 830 pixel browse images.

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New L1B VNIR Browse Image

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New L1B SWIR Browse Image
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New L1B TIR Browse Image
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Policy Considerations/Changes - Pricing

• Prior to August 2002, all ASTER data products
  were available from the LP DAAC to all users
  without charge.
• Certain factors necessitated a change in that
  policy. Currently
• most users pay 55 per scene for L1A L1B data
  and decor. products.
• a 5/per order shipping fee also is applied to
  hard media orders.
• NASA and affiliated users, as well as
  educational users, receive all ASTER data and
  products at no charge.
• The DAACs data pool also contains ASTER data
  over the United States and territories that are
  free to all users.
• The charging policy resulted in a dramatic drop
  in the number of ASTER data granules ordered from
  the DAAC. In general, only about 5 to 15 of
  L1A L1B data distributed by the DAAC are
  purchased by customers.

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