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2008 Fall AGU Meeting: Earth science data system presentations

The Goddard Earth Sciences DISC has a tradition of excellence in utilizing cutting-edge techniques and methods to enable scientists to find and use remote-sensing geophysical data...

The Goddard Earth Sciences DISC has a tradition of excellence in utilizing cutting-edge techniques and methods to enable scientists to find and use remote-sensing geophysical data. Six presentations at the 2008 Fall AGU meeting highlight the DISC's technological expertise.

Six presentations at the 2008 Fall AGU meeting are related to data system improvements, new capabilities for Earth science data systems, and the recovery of historical cloud data.

(Note:   summaries of presentations with GES DISC staff as either first authors or co-authors are included in this news article.)

"Semantic Web Data Discovery of Hydrology and Other Earth Science Data at NASA Goddard Earth Sciences DISC"  updates the improvements to the GES DISC Mirador system, a keyword-based data search and access web interface.  The initial objective of the current enhancement effort is to develop an interface that presents users with multiple "views", such as Project, Instrument, Earth Science Parameter, or Application, which are applied to all the available data in Mirador. Starting with any of these top level views, users can simply and quickly navigate down any of the trees to find data of interest. The key semantic technology behind these tree structures is an ontology based on the Global Change Master Directory (GCMD) Directory Interchange Format (DIF).  Once fully realized, the Semantic Mirador will enable interoperability with other semantically-based data discovery and service frameworks.  Authors:  Richard Strub, Mahbaleshwara Hegde, Chris Lynnes, Hongliang Fang, Bill Teng. 

This presentation is a poster scheduled for Monday, December 15, at 0800, in Moscone Center Hall D, Session IN11B, poster 1031.

Link to session abstracts

"Provenance in Data Interoperability for Multi-Sensor Intercomparison"  considers a large number of factors that affect data interoperability.   One of the key aspects of data interoperability is the provenance of the data, i.e. its origin (sensor), how it was processed, and how its quality was assessed.   The application of semantic web technology enables the encoding of this information into a "well-structured, machine-readable ontology and rulesets".  The various methods by which provenance information can be transmitted are described.  The advantages and disadvantages of a system in which provenance information is embedded with the data payload.   Authors:  Chris Lynnes, Greg Leptoukh, Steve Berrick, Suhung Shen, Ana Prados, Peter Fox, Wenli Yang, Min Min, Daniel Holloway, Yonsook Enloe.

This presentation is a poster scheduled for Monday, December 15, at 0800, in Moscone Center Hall D, Session IN11C, poster 1041.

Link to session abstracts

"Operational Interoperable Web Coverage Service for Earth Observing Satellite Data: Issues and Lessons Learned"  describes the use of the Web Coverage Service (WCS) interoperable interface protocol.    The presentation outlines how the WCS system provides serves data client requests.   Different strategies for WCS implementation are available to data providers, each of which presents challenges.  The case study will examine issues and lessons learned in providing NASA's AIRS Level 2 atmospheric products, which are in satellite swath CRS and in 6-minute segment granule files, as virtual global coverages.  Authors:   Wenli Yang, Min Min, Yuqi Bai, Chris Lynnes, Dan Holloway, Yonsook Enloe, Liping Di.

This is an oral presentation scheduled for Monday, December 15, at 0930, in Moscone Center Room 3020.

Link to session abstracts

"Earth Science Mining Web Services" highlights a new Earth Science data mining methodology allowing data to be mined "at the source", eliminating the need for network data transfers.  The methodology was developed by collaboration between the GES DISC and scientists at the University of Alabama-Huntsville.   The system linked several pre-existing technologies (including the GES DISC S4PM processing engine and the UAH-developed ADaM data mining toolkit), with the main goal to give users control over the data they want to process while mining data at the data source (using the server's resources) rather than transferring the full volume over the internet.  Authors:  Long Pham, Chris Lynnes, Mahabaleshwara Hegde, Sara Graves, Rahul Ramachandran, Manil Maskey, Ken Keiser.

This presentation is a poster scheduled for Wednesday, December 17, at 0800, in Moscone Center Hall D, Session IN31 A, poster 1129.

Link to session abstracts

"Issues in Data Fusion for Use in an Interactive Online Analysis System using MODIS Terra and Aqua Daily Aerosol Data"   describes a continuing evaluation of methods to allow merging of complementary satellite mission data at the global and regional level.   The goal is to enable data merging within the Giovanni system.    The data product used for evaluation is MODIS Aerosol Optical Thickness (AOT).   Three methods (SIM, MLE, and WPC) are evaluated.   Causes of gaps in daily AOT maps are analyzed, and the capability of each method to reduce gaps with and without spatial interpolation is characterized.    The results indicate that merging can provide complete spatial fields with acceptable errors.   Authors:   Arun Gopalan, Viktor Zubko, and Greg Leptoukh.

This presentation is a poster scheduled for Wednesday, December 17, at 1340, in Moscone Center Hall D, session IN33B, poster 1170.

Link to session abstracts

 

" The Value of Cloud Top and Surface Temperature Observations from the 1966 Nimbus II High Resolution Infrared Radiometer Historical Data Record"  examines historical atmospheric data from the Nimbus II HRIR instrument.  The data was recovered from 7-track magnetic tapes.  The presentation analyzes the value of these data with respect to Earth science research, and also evaluates the potential for recovering other historical data for long-term archiving and improved data access.   Authors:  John Moses and Jean-Jacques Bedet.

This presentation is a poster scheduled for Friday, December 19, at 0800, in Moscone Center Hall D, Session IN51B, poster 1160.

Link to session abstracts

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Last updated: Nov 18, 2009 01:04 PM ET
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