Award Data

The objective of this effort is to demonstrate a prototype model of a flight-critical system using AbTech's AIM network synthesis tool and NASA's CLIPS production rule system and to demonstrate the ability of an AIM generated polynomial network to reliably perform sensitivity analysis using variable components of this flight critical system. The resulting adaptive test generation, analysis, and co ...

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The National Aeronautics and Space Administration (NASA) has identified the need for representation, indexing, storage, and retrieval of reusable software components. To address this need, American Research Corporation of Virginia proposes the development of an icon-based software component access system using a model based on the theory of partially ordered sets. Project objectives include develo ...

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The specific proposed innovation is the use of an active radiometer in place of conventional radar techniques for measuring rainfall over the earth's surface from satellite platforms. This technique provides a substantial savings in data acquisition time that can be used to increase the scan rate and to improve the spatial resolution (i.e. reduce the footprint) of the measurements. This will provi ...

When interpreting chemical changes from measurements made on moving platforms it is important to remove signatures due to the motion of the air. This has proved difficult on existing manned aircraft such as the ER-2, necessitating post-processing of the data prior to interpretation. Digital flight control systems offer the possibility to receive signals from onboard scientific payload instruments ...

We propose to design a state-of-the-art active radar calibrator which will be used for absolute calibration of the TRMM Rain Radar. During Phase I, we investigate several architectures and perform design evaluations with the ultimate objective of designing an improved radar calibrator with unprecedented accuracy and stability, yet optimized for cost and complexity. The active calibrator will be op ...

Software testing is one of the most problematic phases of software development. This stems from the inability to gain acceptable confidence that a piece of software will not fail after deployment. Mutation testing is one form of white-box software testing that holds promise in assuring that a piece of software does not contain faults after testing is complete. Mutation testing does this by mutatin ...

The proposed innovation is a CASE tool advisor that will enable NASA to automatically produce higher testability code; this will allow NASA to assess their software systems to higher levels of reliability with fewer test cases. The objectives of this study are to determine how testable current CASE generated code is, decide where a testability advisor might reside, and determine the feasibility of ...

We propose to create an integrated code environment for atmospheric photochemical modeling codes that will allow both scientists and data analysts to tailor photochemical reaction schemes within a windows-oriented user environment, to compile and execute the codes, and to inspect the results without actual editing of source codes. The innovative aspect of this proposed development is the design an ...