The document discusses the HDF-EOS data format and software toolkit. It summarizes recent additions to the toolkit, including new capabilities for handling swath data and accessing metadata. Near-future development plans include additional testing and preparing the software and test data for the EOS-AM1 launch. Potential enhancements discussed include supporting new data types and sensor geometries, incorporating HDF5, and adding more sophisticated subsetting capabilities. Maintenance and user support is provided by ECS through 2022.

1. EOS
DATA INFORMATION SYSTEM
EARTH PROBES
NASA'S MISSION TO PLANET EARTH
EARTH OBSERVING SYSTEM
HDF-EOS Development Status and
Maintenance Support
Larry Klein
Space Applications Corp.
September 23, 1998

2. NASA'S MISSION TO PLANET EARTH
EARTH PROBES
DATA INFORMATION SYSTEM
Features Added Since Last
Workshop
EOS
EARTH OBSERVING SYSTEM
• Vertical subsetting for Point structure: PTdefvrtregion()
• Additional capability for handling indexed swaths (Landsat 7
overapping scenes): enhancements to SWextractregion() and
SWregionindex()
• Access for index map for subsetted swath: SWupdateindexmap()
• Function to return dimension-mapping information between Geo
and Data dimensions: SWgeomapinfo()
• Increased limit of simultaneous open swath files to 200.
• Reduction in overhead (10X) in reading grid points:
GDgetpixvalues()
• Added capability to support HDF tiling with compression.
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3. NASA'S MISSION TO PLANET EARTH
EARTH PROBES
DATA INFORMATION SYSTEM
Related Development
EOS
EARTH OBSERVING SYSTEM
• GUI-based HDF-EOS skeleton file creation: HDF-EOS
Configuration Record
- Developed by NCSA, released by ECS spring, 1998.
• Reduced ECS Science Data Processing Toolkit/HDF-EOS package
- Uses same metadata and time tool interface as standard toolkit.
- Intended for application developers and for data production
outside ECS, but archival inside.
- Will work on Windows, Macs, as well as standard UNIX
platforms.
- Is available by request on Sun, SGI, HP, Windows (95 & NT).
• EOSView V3.0 released August, 1998. Added:
- Plot filters.
- Image display for 24-bit graphics card.
- Plotting for tables larger than 1000 X 1000.
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4. NASA'S MISSION TO PLANET EARTH
EARTH PROBES
DATA INFORMATION SYSTEM
Near-Future Development
EOS
EARTH OBSERVING SYSTEM
• Intensive testing on-going with instrument data processing
software.
• Expect improvements in efficiency as system is stressed. eg.
possible simplification of metadata checking.
• Data production software and test data are nearing final launch
versions. We expect several bug fixes and regression testing.
• Final ECS version to support EOS-AM1 launch: December, 98.
• Launch currently June, 1999.
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5. NASA'S MISSION TO PLANET EARTH
EARTH PROBES
DATA INFORMATION SYSTEM
Potential Enhancements
EOS
EARTH OBSERVING SYSTEM
• Structures to accommodate other data types:
- Vertical profilers vs. imagers.
- More complex indexing schemes and services to support:
Non-sequencial scanners, e.g. helical scanners,
Multiple viewing geometries for a single sensor.
• Incorporation of HDF5.
• Optional simplified interface, e.g. file copy, write file
• Add additional projections: Currently, the toolkit supports 32
USGS projections; HDF-EOS supports 10, plus Integerized
Sinusiodal Projection. Gridded-swath added for MISR.
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6. NASA'S MISSION TO PLANET EARTH
EARTH PROBES
DATA INFORMATION SYSTEM
Potential Enhancements (cont.)
EOS
EARTH OBSERVING SYSTEM
• Add more sophisticated subsetting:
- Return data within a lat/long box rather than whole scanlines.
- Polygonal subsetting.
• Combination of graphical user interfaces for ECS inventory
metadata definition and for HDF-EOS configuration (i.e.
coordinate structural and inventory metadata).
• Your enhancement here.....
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7. NASA'S MISSION TO PLANET EARTH
EARTH PROBES
DATA INFORMATION SYSTEM
Maintenance and User Support
Responsibility
EOS
EARTH OBSERVING SYSTEM
• ECS (SAC) has the responsibility for HDF-EOS and toolkit maintenance
and user support, until October, 2002.
• We expect future releases which accommodate EOS-PM1, EOS-CHEM
instruments.
• User interaction is provided through email: pgstlkit@eos.hitc.com or
listserver: sdptoolkit@listserv.gsfc.nasa.gov or
eostools@gsfc.nasa.gov.
• Software fixes go through a formal process:
- Tracked through Non-Conformance Reports, Gov’t and DAACs have
access.
- Fixes regression-tested through configuration controlled test drivers.
- Independent Test and Quality Assurance organizations.
- Patches are released through a control board.
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