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Delay Tolerant Link State Routing MACHETE Model

NASA’s Jet Propulsion Laboratory, Pasadena, California This software models the Delay Tolerant Link State Routing protocol. It runs inside the QualNet network simulator, and allows injecting of external bundles when running in emulation mode. It leverages QualNet’s library of networking protocols and JPL’s CCSDS models.

Posted in: Briefs, Electronics & Computers

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Extendable Uniform Remote Operations Planning Architecture (EUROPA) 2.1

Ames Research Center, Moffett Field, California The EUROPA planning system is a general-purpose, reusable, artificial intelligence software system for automatically generating plans for performing complex activities in parallel, in accordance with constraints on activities and their interactions. One part of the system input is a domain model, which describes the subsystems in question, their possible activities, and the associated constraints. The other part is a plan request, consisting of a set of activities and constraints among them. Given these two inputs, the system will try to find a complete plan that allows all aspects of the plan request to be done, while satisfying the constraints specified in the domain model. This functionality includes the capability of verifying that a plan satisfies all constraints. The system is designed to allow different techniques to be used to complete or verify plans.

Posted in: Briefs, Electronics & Computers

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Acoustic Emission Analysis Applet (AEAA) Software

This program has application for any pressure vessel acoustic emission data where advanced analysis is needed. John H. Glenn Research Center, Cleveland, Ohio Vendor software supplied with commercial acoustic emission equipment is incapable of performing the analysis required to characterize damage and make decisions on remaining life for NASA composite overwrapped pressure vessels (COPVs). The Acoustic Emission Analysis Applet (AEAA) software, currently a post-processing capability, will, in the second phase of the program, be modified to work in-situ in order to allow near-real-time decision-making on COPV damage and remaining life. Ultimately, this software will be utilized in-situ in pseudo-real time to monitor COPVs on space vehicles.

Posted in: Briefs, TSP, Electronics & Computers

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Software-Defined Beacon Receiver Implementation Using Frequency Estimation Algorithms

This algorithm yields a more accurate measurement of frequency and signal power than conventional approaches. John H. Glenn Research Center, Cleveland, Ohio The objective of this work was to develop a robust, cost-effective receiver with maximum dynamic range to track the frequency and power variation of a beacon signal. The result was the development of a frequency estimation algorithm that yields a more accurate measurement of frequency and signal power than conventional approaches like a simple FFT (fast Fourier transform) peak search with bin summing, or a phase locked loop (PLL).

Posted in: Briefs, TSP, Electronics & Computers

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CT-CURS: Computed Tomography Cylinder Data Unwrapping-Reslicing & Analysis, v2

John H. Glenn Research Center, Cleveland, Ohio The software for NASA’s Northstar Systems computed tomography (CT) and Picometrix Terahertz CT systems do not have the ability to unwrap and reslice cylindrical CT data to allow top-to-bottom, 2D sheet views of the data. Therefore, it is difficult to size flaws laterally (although viewing slices in the slice view plane allows sizing flaws in the depth [exterior-to-interior] direction). The unwrapped and resliced view would greatly facilitate inspection assessments.

Posted in: Briefs, TSP, Electronics & Computers

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NTTS Search and Reporting

Ames Research Center, Moffett Field, California The NASA Technology Transfer System (NTTS) is a NASA-created technology transfer workflow management system, a schema-less database management system used to track the life-cycle of NASA inventions. It is built on XDB, a NASA homegrown XML database. Because of its schema-less approach to store data, NTTS can host a cluster of distributed XDB nodes, referred to as GridXML data-storage framework (GDX). NTTS stores data associated with different modules like Invention Disclosures, Patent Applications, Contract Grants, and Partnership Agreements, etc. Different communities at NASA use a module or a group of modules to manage their domain workflow. With volumes of heterogeneous data stored in different modules on a schema-less storage framework, the challenge is to provide a flexible query Application Programming Interface (API) to perform traditional relational-model queries. This challenge is addressed by the NTTS Search API, the product of this invention.

Posted in: Briefs, Electronics & Computers

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Products of Tomorrow: June 2015

The technologies NASA develops don’t just blast off into space. They also improve our lives here on Earth. Life-saving search-and-rescue tools, implantable medical devices, advances in commercial aircraft safety, increased accuracy in weather forecasting, and the miniature cameras in our cellphones are just some of the examples of NASA-developed technology used in products today.

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