peter posted on October 24, 2011 09:47
INNOVIM is extremely proud of its staff scientists who continue to produce groundbreaking research and valuable published knowledge in their fields of study.
Two such examples are Dr. Suraiya Ahmad and Dr. Levon Avanov. Both contributed to papers which will be presented at the American Geophysical Union (AGU) Fall Meeting 2011. Dr. Avanov is a first author and will appear at the conference as a presenter. The AGU meeting will be held in San Francisco on Dec. 5-9, 2011.
Dr. Ahmad represents INNOVIM at NASA Goddard Space Flight Center. She is a co-author in a work titled A Semantic Representation of Product Quality and Evidence for Satellite Data. Other authors listed are Stephan Zednik, Gregory G. Leptoukh, Peter Arthur Fox, Christopher Lynnes and Patrick West.
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ABSTRACT: There is growing interest within the broad research community to leverage satellite data for cross-disciplinary analysis and to make use of the data in ways unanticipated by the data provider. Poorly documented or publicized product quality information is a significant barrier to the successful or confident integration of satellite data for many users. Researchers seek clearly and consistently characterized product quality to facilitate assessment of product fitness-for-use. We argue that data product discovery mechanisms should be augmented with facilities to present product quality information; targeted to provide a condensed and clear view of product quality and to support comparison with quality of other like products.
We propose a method of provisioning product quality into aspects (e.g. completeness, consistency, accuracy, bias) and displaying computed and inferred facts as evidence to help characterize one or more aspects of the product quality. We describe the product quality ontology developed to facilitate this characterization of product quality. Finally, we illustrate the utility of this approach by showing how we have applied it to presenting product quality for the NASA MODIS Aerosol data product within a prototype implementation of the NASA Giovanni Data Access and Analysis Tool.
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Dr. Avanov also represents INNOVIM at NASA GSFC. He is the first author on the paper titled Dual Electron Spectrometer for Magnetospheric Multiscale Mission: results of the comprehensive tests of the Engineering Test Unit. Other authors include Ulrik Gliese, Albert Mariano, Corey Tucker, Alexander Barrie, Dennis J. Chornay, Craig James Pollock, Joseph T. Kujawski, Glyn A. Collinson, Quang T. Nguyen, Craig R. Auletti, Traci P. Rosnack, Michael A. Zeuch, Kent Christian, Victor L. Bigio, Kimathi N. Tull, Alan M. Rucker, Nga T. Cao, Darrell L. Smith, James V. Lobbel and Arthur D. Jacques.
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ABSTRACT: The Magnetospheric Multiscale mission (MMS) is designed to study fundamental phenomena in space plasma physics such as a magnetic reconnection. The mission consists of four spacecraft, equipped with identical scientific payloads, allowing for the first measurements of fast dynamics in the critical electron diffusion region where magnetic reconnection occurs and charged particles are demagnetized. The MMS orbit is optimized to ensure the spacecraft spend extended periods of time in locations where reconnection is known to occur: at the dayside magnetopause and in the magnetotail. In order to resolve fine structures of the three dimensional electron distributions in the diffusion region (reconnection site), the Fast Plasma Investigation’s (FPI) Dual Electron Spectrometer (DES) is designed to measure three dimensional electron velocity distributions with an extremely high time resolution of 30 ms. In order to achieve this unprecedented sampling rate, four dual spectrometers, each sampling 180 x 45 degree sections of the sky, are installed on each spacecraft. We present results of the comprehensive tests performed on the DES Engineering & Test Unit (ETU). This includes main parameters of the spectrometer such as energy resolution, angular acceptance, and geometric factor along with their variations over the 16 pixels spanning the 180-degree tophat Electro Static Analyzer (ESA) field of view and over the energy of the test beam. A newly developed method for precisely defining the operational space of the instrument is presented as well. This allows optimization of the trade-off between pixel to pixel crosstalk and uniformity of the main spectrometer parameters.
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