AIRS Data Support and Service at the Goddard Earth Sciences DISC DAAC

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Jianchun Qin, Liguang Wu, Michael Theobald, A. K.
Sharma, George Serafino, Sunmi Cho, Carrie
Phelps NASA Goddard Space Flight Center, Code
902 Greenbelt, Maryland 20771
AIRS Data Support and Service at the Goddard
Earth Sciences DISC DAAC
AIRS Data Provider
AIRS Data Support and Service
AIRS Data User
Data Processing Support
Data Integrity
Value-Added Data Services
User Assistance
The AIRS Data Support Team at GES DISC DAAC
provides science and data support to assist the
AIRS data user in understanding, accessing and
utilizing the AIRS data products. User
assistance includes
AIRS Data Support Team is developing,
researching, integrating on-line/off-line tools
in order to assist users in manipulating AIRS
data files.

• The AIRS data processing support involves the
  AIRS Earth Science Data Type (ESDT) management,
  integration of science software in the production
  systems (both the Planning and Data Processing
  Subsystems (PDPS) and the Simple Scalable
  Script-based Scientific Processor - Mission
  (S4PM)), monitoring data production, and trouble
  shooting.
• ESDT Support
• AIRS Descriptors verification and updates
• ESDT installations and checkout in ECS
  operations
• EOS Data Gateway (EDG) Valids processing,
  submission and updates
• EDG testing and checkout for new products
• Coordinating the public release of AIRS
  products
• Science Software Integration Test (SSIT)
  Support
• Goddard Automation Tools for Enhanced SSIT
  (GATES) is a suite of tools for automating,
  standardizing, and documenting SSIT activities.
  Activities of GATES include
• Development of SSIT Tools
• Maintenance of AIRS SSIT Documents
• Development of Web Forms for Controlled
  Integration
• AIRS Test Summary Reports
• Maintenance of AIRS SSIT Agreement
• Replacement of PDPS by S4P-Mission
• Due to the successful deployment of S4PM for
  MODIS processing, ESDIS requested the
  incorporation of AIRS into S4PM.
  Implementation is scheduled for October 2001 -
  February 2002 as follows
• L1 Implementation 1 October - 15 November
• L1 Testing 29 October - 15 December
• L2 Implementation 1 December - 15 January

• The AIRS Data Support Team assists the Data
  Producer by performing data integrity checks.
  These checks fall into three categories
  production, ingest and distribution checks.
• Production
• Production tools are helpful in checking the
  production at each stage. Data gaps due to
  data/system problems can be determined by these
  tools. Data integrity checks are also performed
  in the production stream and metadata validation
  to identify problems with science algorithms and
  corrupted data, and to ensure proper database
  population of attributes.
• Data Ingest
• Metadata check tools are used to compare the
  metadata before and after the ingestion. This
  includes validation of all the attributes and ECS
  Core metadata quality check.
• Distribution
• Distribution tools are designed to help many
  aspects of distribution system including the
  statistics of the data distributed to different
  users on different media. These tools are
  helpful in determining the most popular data
  products and media.
• Other QA Support
• Application of MUSE/QAMUT (QA Metadata Update
  Tool)
• Identifying problems through tool development
  and team players knowledge of the data
• Data production and distribution tools are
  listed as
• AIRS L0 Data Monitor
• AIRS Data Production Monitor
• AIRS Data Production Request Monitor
• AIRS Shipping Monitor
• AIRS Data Distribution Monitor
• AIRS Data Archive Monitor
• AIRS Data Inventory Monitor

• Informational webpages which provide access to
• Various technical documents
• Readme, AIRS Guide, DIFs
• Product ordering and distribution
• Sample imagery
• HDF-EOS format information
• Online data tools
• AIRS Science Team web links
• Contact information
• http//daac.gsfc.nasa.gov/atmodyn/airs/
• AIRS Data Access
• DAAC Search and Order
• Enables users to request data efficiently through
  hierarchical architecture. Shows temporal
  coverage, number of items, average item size,
  description and
• browse images for the AIRS
• data products available. At
• certain levels of the hierarchy,
• spatial, temporal, orbital and

• Channel/variable subsetting and restructuring
• The web-based AIRS on-the-fly/on-demand subsetter
  performs channel and variable subsetting and
  restructuring for AIRS Level 1A, Level1B and
  Level2 data products. One can narrow down
  criteria to subset data files with desired
  channels and variables and download the subsetted
  file.

• Data mining
• Integrate and run user-provided data reduction
  algorithms to routinely generate value-added
  products. This type of procedure, so-called
  knowledge discovery from data bases (KDD),
  provides an external subsystem that interfaces
  with GES DISC DAAC system in a manner similar to
  that of other data producers.

• Data format and tools support
• AIRS data users will need certain tools to get
  full use out of AIRS data which is in HDF-EOS
  format. Tools that are available for reading,
  displaying and manipulating AIRS data will be
  tested and recommended to AIRS users as they
  become available. AIRS users can have a list of
  those tools from the AIRS Data Support web page.
  In addition, the AIRS Data Support Team will
  provide programs in various computer languages
  (e.g., C, FORTRAN, IDL, MATLAB) for this purpose.

• On-line data visualization and analysis
• The HTML/CGI interfaces interacting with data
  analysis software, such as IDL, allow users to
  search, select, analyze and manipulate

data, and assure data contents such as domain,
parameters, data quality, physical features prior
to ordering data product. The vertical profiling
feature will be particularly useful with AIRS
data.
Web snapshots of monitoring tools are courtesy
ECS.