Tech Briefs

Electronics & Software

Access our comprehensive library of technical briefs on electronics and software, from engineering experts at NASA and major government, university, and commercial laboratories.

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Briefs: Electronics & Computers
Designing automotive electronics presents numerous technical challenges, including the need to protect against electrical hazards. The three major sources of electrical hazards in...
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Briefs: Sensors/Data Acquisition
A Resistive, High-Voltage, Differential Input Interface in a 3.3-V BiCMOS 0.5-μm Process for Extreme Environments
Wide-temperature and extreme-environment electronics are crucial to future missions. These missions will not have the weight and power budget for heavy harnesses and large, inefficient warm boxes. In addition, extreme-environment...
Briefs: Electronics & Computers
Precision Current Input With Well-Defined Current Limiting for Extreme Environment Applications
Wide temperature and extreme environment electronics are crucial to future missions. These missions will not have the weight and power budget for heavy harnesses and large, inefficient warm boxes. In addition, extreme environment electronics, by their...
Briefs: Software
Large Computer-Generated Hologram with Software-Generated Calibration Wavefront Map
This technology enables accurate calibration of a large Computer Generated Hologram (CGH) fabricated without great accuracy, such that the CGH still measures an aspheric surface to an excellent accuracy of a couple of nm rms. The goal is the creation of software for...
Briefs: Sensors/Data Acquisition
Negative Dielectric Constant Material Based on Ion-Conducting Materials
Metamaterials, or artificial negative index materials (NIMs), have generated great attention due to their unique and exotic electromagnetic properties. A negative dielectric constant material, which is an essential key for creating the NIMs, was developed by doping ions into a...
Briefs: Propulsion
Complex pressure systems are utilized during testing in the propulsion branch as well as during the propellant loading stage of a mission. Keeping track of the state of such a system becomes more...
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Briefs: Software
Habitat Demonstration Unit Core Avionics Software
The Habitat Demonstration Unit Core Avionics Software (HDU-CAS) is designed to provide the required functionality for an engineering prototype of a highly autonomous space habitat element, and to provide an opportunity for new software technologies to be tested in an environment that provides that...
Briefs: Information Technology
Multicore ROCKSTER
ROCKSTER (Rock Segmentation Through Edge Regrouping) is a rock detection algorithm that analyzes 2D geologic scenes and identifies rocks and other targets of interest. A multicore ROCKSTER enables long-range autonomous rover traverse science to be performed efficiently and to make use of multicore or parallel computing...
Briefs: Software
Non-Binary Protograph-Based LDPC Codes with Near-Capacity Thresholds
Binary protograph codes are state-of-the-art codes over the binary field Galois Field GF(2). These codes were invented by JPL in 2003 and proposed to CCSDS (Consultative Committee for Space Data Systems) recently as a channel-coding standard for space communications. It is...
Briefs: Information Technology
Dynamically Configurable Pipeline
The Dynamically Configurable Pipeline is a concept for the rapid implementation of pipelined computational algorithms in configurable hardware such as field programmable gate arrays (FPGAs). The approach, especially in its phase-coherent incarnation, allows a high level of sharing of floating-point resources among...
Briefs: Information Technology
Frame Synchronization Without Attached Sync Markers
In communications systems, there must be a method to identify the beginning of a message at the receiving end, to know when the data stream of a specified structure begins. This is conventionally done by inserting attached sync markers (ASMs) between codewords, and looking for these ASMs in the...
Briefs: Information Technology
Scalable ParaView for Extreme Scale Visualization
Work has been focused on identifying bottlenecks in visualization pipelines that make the visualization and analysis of large datasets in real time difficult to attain. The innovators leveraged ParaView, an open-source visualization application and framework, to provide custom solutions for users of...
Briefs: Information Technology
Explicit Filtering Leading to Grid-Spacing-Independent and Discretization-Order-Independent Large Eddy Simulation Solutions
Numerical simulations for turbulent flows using the most promising methodology, Large Eddy Simulation (LES), are grid-spacing and discretization-order dependent. This means that the solution is not trustworthy and cannot be...
Briefs: Software
Explicit Filtering Leading to Grid-Independent and Discretization-Order-Independent Large Eddy Simulation
To validate simulations, one must trust that they are independent of the numerical aspects. A very promising, relatively new methodology for simulating turbulent flows, called Large Eddy Simulation (LES), has some issues in this respect. The...
Briefs: Aerospace
Mars Science Laboratory Second-Chance Flight Software
Mars lander spacecraft, beginning with Mars Pathfinder (MPF), have been designed to tolerate flight computer resets during the entry, descent, and landing (EDL) phase despite having only a single flight computer. This capability was enabled by a predictable, non-dynamic EDL architecture. The...
Briefs: Information Technology
Multi-User Investigation Organizer
InvestigationOrganizer (IO) is a Web-based information system that integrates the generic functionality of a database, a document repository, a semantic hyper-media browser, and a rule-based inference system with specialized modeling and visualization functionality to support mishap investigations. The semantic...
Briefs: Information Technology
Unit Conversion Macro for TecPlot Solutions for CFD
The invention is a TecPlot macro, which is a computer program in the TecPlot programming language that processes CFD (computational fluid dynamics) solutions in TecPlot format. The TecPlot data is in SI units (International System of Units) [same as CFD solutions]. This invention converts the SI...
Briefs: Electronics & Computers
PATTERNS: Panoptic Aspect Time Triggered Ethernet Robust Network Scheduler, Version 1.0
The PATTERNS scheduling tool was created to test the multi-plane concept of a Time Triggered Ethernet (TTE) network. The TTE network interface cards used in the Orion vehicle contain three physical network ports, referred to as planes. Each plane exists to serve...
Briefs: Electronics & Computers
Electromagnetic Waves Transformed from a Coherent to a Quasi-Coherent Nature
The transformation of naturally occurring electromagnetic waves called “chorus” from a coherent nature to a quasi-coherent nature when propagating a distance from its source was demonstrated. The aim of the mission was to study the energizing of electrons by the waves...
Briefs: Electronics & Computers
An Earth-Observing, Frequency-Agile Radar Receiver for RFI Mitigation
The Soil Moisture Active Passive (SMAP) mission will have the first L-band radar/radiometer sensor suite dedicated to global measurements of soil moisture. For the radar sensor, the requirements for achieving high backscatter measurement accuracy from low-Earth orbit present a...
Briefs: Sensors/Data Acquisition
Wireless Electrical Devices Using Floating Electrodes
A wireless, connection-free, open circuit technology can be used for developing electrical devices like sensors that need no physical contact with the properties being measured. At the core of the technology is the SansEC (Sans Electrical Connections) circuit that is damage-resilient and...
Briefs: Sensors/Data Acquisition
Web-Enabled and Automatic Ground Processing Infrastructure Servicing the UAVSAR Airborne Missions
The UAVSAR (Uninhabited Aerial Vehicle Synthetic Aperture Radar) ground data processing infrastructure facilitates a wide range of mission operational processes through a centralized database, Web-enabled interfaces, and background automation. By...
Briefs: Energy
Variable-Sweep-Wing Aircraft Configuration
Efficient aircraft designs are increasingly desired in order to support the continued growth of the air transportation industry. Continued expansion of this vital mode of transportation is threatened due to concerns over ever-increasing emissions, noise, and the demand for fuel. Current airport runway,...
Briefs: Communications
Automatic Dependent Surveillance Broadcast System for Traffic Situational Awareness
An integrated communications and control system for unmanned aircraft systems (UAS) utilizes automatic dependent surveillance broadcast (ADS-B) technology. The prime objective of this system is to address safety concerns related to UAS sharing airspace with...
Briefs: RF & Microwave Electronics
A variety of antenna tuning techniques exist for conventionally constructed antenna structures, such that when an antenna is converted from a design to an actual fabricated structure, slight adjustments can be...
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Briefs: Communications
Protograph-Based LDPC Bit-Interleaved Coded Modulation
Bandwidth and power-coded modulation schemes are very desirable for many applications in high-data-rate transmission over a given allocated bandwidth. The goal is to design such coded modulation system for a given throughput with the lowest possible signal-to-noise ratio for not only a channel...
Briefs: Communications
Flight Imagery Recorder Locator (FIRLo) and High-Temperature Radome
LDSD (Low Density Supersonic Decelerator) is a Mars EDL (entry, descent, and landing) Technology Development Project that launches three test vehicles out of the Pacific Missile Range Facility in Kauai. On the test vehicle, most mission science data can be recorded safely on land;...
Briefs: Communications
Policy negotiation is the process of determining the “best” communication protocol that satisfies all requirements of all parties involved. The main challenge here is how to reconcile the various (and...
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Briefs: Physical Sciences
A Continuous-Flow, Microfluidic, Microwave-Assisted Chemical Reactor
In industrial synthetic chemistry laboratories, reactions are generally carried out using batch-mode methodologies, stepwise reactions, and purifications to generate a final product. Each step has an associated yield of both the reaction itself and of the final purification that...

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