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Next Generation Transport Phenomenology Modeling Tool for Terrestrial and Planetary Applications
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| In this project, previously developed and validated codes for modeling photoelectron and auroral electron transport and related optical emissions for the upper atmosphere are being reengineered and incorporated into a middleware framework based on the CORBA Component Model (CCM), which allows coarse grain parallelization and distributed computing, among other things. Specifications have been written for each of the transport solutions, which provide descriptions of the solution techniques at a level of detail not previously available. The reengineered versions are written primarily in Java, while the original legacy versions were written in FORTRAN 77. Although there have been concerns that Java is slower than FORTRAN, these concerns have been allayed, since the actual difference in processing speed has been found to be within a factor of 2, which can be offset by the parallel processing capability. Certain legacy models are incorporated directly using wrappers rather than being rewritten. The new software is embedded in the Enterprise Java CORBA Component Model, an implementation of the CCM that was developed at CPI. The new modeling software offers improved maintainability, more extensive code reuse where similar algorithms are used in different models, and greater flexibility for studying terrestrial and planetary atmospheres. It is being added to a more general suite of open source software called Aeronomy Modeling Phenomenology Tool (APMT), which also includes a photochemistry model developed under a previous AISR project. |
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