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Briefs: Information Technology
Simple RunTime eXecutive (SRTX)
Simple RunTime eXecutive (SRTX) software provides scheduling and publish/subscribe data transfer services. The scheduler allows dynamic allocation of real-time periodic and asynchronous tasks across homogeneous multi core/multiprocessor systems. Most real-time systems assign tasks to specific cores on an a priori...
Briefs: Information Technology
v-Anomica: A Fast Support Vector-Based Novelty Detection Technique
Outlier or anomaly detection refers to the task of identifying abnormal or inconsistent patterns from a dataset. While they may seem to be undesirable entities, identifying them has many potential applications in fraud and intrusion detection, medical research, and safety-critical...
Briefs: Information Technology
Self-Stabilizing Distributed Clock Synchronization Protocol for Arbitrary Digraphs
A report describes a self-stabilizing distributed clock synchronization protocol in the absence of faults in the system. It is focused on the distributed clock synchronization of an arbitrary, non-partitioned digraph ranging from fully connected to 1-connected...
Briefs: Software
Precision Navigation Strategies for Primitive Solar-System-Body Sample Return Missions
This project investigated advanced navigation strategies required to approach, perform proximity operations, and return a sample from an asteroid or comet. An optimized navigation strategy for a notional mission to a near-Earth asteroid was developed to serve as...
Briefs: Information Technology
Orbit Determination Toolbox 2012a (v5.0)
The Orbit Determination Toolbox (ODTBX) 2012a (v5.0) is an advanced mission simulation and analysis tool used for concept exploration, proposal, early design phase, or rapid design center environments: the emphasis is on flexibility, but it has enough fidelity to produce credible results. ODTBX v5.0 includes...
Briefs: Software
Design and Construction of Protograph-Based LDPC Codes
Writing (recording) to a storage device and reading from it can be considered as a noisy channel. A storage device such as magnetic recoding and optical recording can be modeled as a partial response channel. Partial-response techniques are a special case of precoding technique where the...
Briefs: Information Technology
Spitzer Integrated Resource Planning and Scheduling System (SIRPASS)
This decision support system provides an integrated platform for assessing the quality of Spitzer scheduling options. The application aids in scheduling instrument selection, assigns schedule times to specific observation requests, and generates stored sequence products destined...
Briefs: Software
Tracking a Scene on Earth from Space Using the Adaptive Cross-Correlation Algorithm
A software program enables a user to track a scene or a spot on Earth from space (such as from the ISS) using an innovative algorithm. This robust and highly accurate software allows a scene to be tracked that can be not only the shifted version of a previous scene,...
Briefs: Information Technology
Automated Scheduling of Personnel to Staff Operations for the Mars Science Laboratory
The task of producing Mars Science Laboratory (MSL) personnel schedules is daunting. Through automation, the labor and number of mistakes made are reduced when compared to the manual process. This software not only allows for common constraints to be expressed,...
Briefs: Information Technology
Area Coverage Path Planning Using Divided Grid-Graphs
Planning area coverage observations is a challenge in an architecture with a framing imager affixed to a bus that can be moved, and a mirror or other device that allows for small, but fast, observation of adjacent areas along the boresight of a telescope. The telescope boresight can slew slowly...
Briefs: Information Technology
Shape Sensing Using Multicore Fiber Optic Cable and Parametric Curve Solutions
Apaper reports a method of converting distributed curvature measurements into a three-dimensional shape by combining elastic rod theory and differential geometry to arrive at a three-dimensional solution of the Frenet-Serret formulas. A new method of calculating the...
Briefs: Information Technology
Encoders and Decoders for the AR4JA LDPC Codes
Low-Density Parity-Check (LDPC) codes are the best error-correcting codes known for a wide variety of communications applications. The AR4JA code family encompasses encoders and decoders for nine error-correcting codes. These include Accumulate, Repeat-by-4, and Jagged Accumulate (AR4JA) codes...
Briefs: Information Technology
Explicitly Filtered Large Eddy Simulation for Prediction of a Conserved Scalar
The prediction of a conserved scalar is important in many fields of study. For example, in modeling of combustion processes, if a conserved scalar exists, the mathematical problem can be greatly simplified. Inert gases transported in mixtures of other gases are also...
Briefs: Information Technology
Dictionary Management System
The Dictionary Management System (DMS) is a Web-based tool to develop and store a project command and telemetry dictionary. The dictionary defines a project’s flight/ground interface. In recent years, dictionaries have become very large, making it hard to maintain traditional methods of flat-file storage and manual...
Briefs: Information Technology
National Vulnerability Database (NVD) Query Tool
Currently, there are no programmatic methods to query the NIST National Vulnerability Database (NVD) without downloading the entire database in XML format, parsing the content, loading the resulting data into a self-hosted database, and then developing an interface for querying the content. This tool...
Briefs: Test & Measurement
The deleterious effects of microgravity are undeniable: reduced bone mineral density, muscle atrophy, vascular remodeling, etc. These health issues...
Briefs: Test & Measurement
The primary function of a window is to allow observation of, and protection from, a potentially hazardous environment. Yet, from the window designer’s point of view,...
Briefs: Test & Measurement
Measurement of O-phthalaldehyde (OPA)
O-phthalaldehyde (OPA) is a high-level disinfectant commonly used, for example, for sterilization of heat-sensitive medical instruments; it demonstrates effective microbicidal activity against a wide range of microorganisms (including mycobacteria, gramnegative bacteria, and spores). On the International Space...
Briefs: Test & Measurement
Fire safety in space vehicles is of utmost importance, especially for manned flight. On the International Space Station (ISS), events that may lead to fires, especially smoldering, must be...
Briefs: Test & Measurement
Decomposition Technique for Remaining Useful Life Prediction
Technology has been developed that provides a way to compute the remaining useful life (RUL) of a component or system. The estimation of the RUL of a degraded or faulty component is at the center of condition-based maintenance, and prognostics and health management. It gives operators a...
Briefs: Test & Measurement
Researchers at NASA’s Armstrong Flight Research Center have developed and tested a new strain gage that makes significant strides in the state of the art, particularly salient given the...
Briefs: Manufacturing & Prototyping
Additive manufacturing (AM, also informally known as 3D printing) is a relatively new process for fabricating net- shaped parts from a...
Briefs: Manufacturing & Prototyping
Manufacturing reliable, high-performing parts and components that have extended lifecycles is crucial for the pneumatics and hydraulics industry. From springs to fittings, the performance of each...
Briefs: Electronics & Computers
NUMIT2.0
Internal electrostatic discharge (IESD) can cause spacecraft failure and anomalies related to the space environment, but it is very hard to predict when IESD might happen. Therefore, assessment of the IESD at a given space environment and a given dielectric geometry is important for spacecraft reliability.
Briefs: Manufacturing & Prototyping
Reusable Integrated Instrument Control and Computing Platform
ISAAC (Instrument Shared Artifact for Computing) offers adaptability, computation power, I/O bandwidth, digital interface standards, and data processing capability in a single, common, low-mass/power, and small-form-factor platform with significantly reduced, nonrecurring cost and risk...
Briefs: Electronics & Computers
Next-generation synthetic aperture radar (SAR) remote sensing platforms utilize new concepts such as the SweepSAR techniques that provide increased swath size, high...
Briefs: Electronics & Computers
Eliminating Wires in Making Electrical Connections to a Stack of Electron and Ion Optical Components
Making electrical connections inside a vacuum chamber to a stack of electron and ion optical components using the conventional approach of...
Briefs: Electronics & Computers
Graphene Composite Materials for Supercapacitor Electrodes
In recent years, electrochemical capacitors, or supercapacitors, have gained the most intense interest as an alternative to traditional energy storage devices such as batteries. The demands of the potential supercapacitor applications range from plug-in hybrid electric vehicles (PHEVs) to...
Briefs: Electronics & Computers
Integrated, Radiation-Hardened Radio Frequency Digitizer and Signal Processing Electronics
Imaging LiDAR systems such as Goddard’s Reconfigurable Solid-state LiDAR (GRSSLi) must collect and process reflected pulses of light in order to correctly assemble a three-dimensional image of the scene. These pulses of light generally range from 2-5...
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