Articles: Sensors/Data Acquisition
Collaborative Platforms Aid Emergency Decision-Making

NASA runs and partners in many missions dedicated to monitoring the Earth, and the tools used in these missions continuously return data on everything from shifts in temperature, to cloud...

A high-temperature-capable widebandgap semiconductor power module package, coupled with a new high-temperature- capable bonding process...

Briefs: Electronics & Computers
Methods for Mitigating Space Radiation Effects, Fault Detection and Correction, and Processing Sensor Data

The Integrated Modular Avionics (IMA) architecture being developed for space applications requires that sensor data be autonomously sampled and transmitted to the system network. This transmission needs to occur on a predetermined, fixed...

Briefs: Electronics & Computers
Quad First Stage Processor: A Four-Channel Digitizer and Digital Beam-Forming Processor

A 4-channel digitizer was designed, built, and tested. The very large, complex board enables SweepSAR. The proposed Deformation, Eco-Systems, and Dynamics of Ice Radar (DESDynl-R) Lband SAR instrument employs multiple digital channels to optimize resolution...

Briefs: Electronics & Computers
Compact Ka-Band Antenna Feed with Double Circularly Polarized Capability

NASA has an interest in utilizing the Ka-band frequency allocation. One of the main reasons for migrating to Kaband is the need for higher frequency bandwidth to enable higher data rates. A dual circular polarized wideband antenna for Ka-band communications applications was...

Briefs: Mechanical & Fluid Systems
CubeSat Deployable Log Periodic Dipole Array

The antenna is composed of two main deployable structural components that help it achieve the large packing factor necessary to fit within the small volume of the CubeSat. The primary component of...

Briefs: Robotics, Automation & Control
Protective Sleeve for a Pyrotechnic Reefing Line

A metallic sleeve provides protection and guidance for the actuating lanyard pull of a parachute system reefing line cutter. This device ensures that the reefing line cutter is not damaged...

Briefs: Robotics, Automation & Control
Metabolic Heat Regenerated Temperature Swing Adsorption

Two fundamental problems facing the development of a portable system to sustain life on extraterrestrial surfaces are (1) heat rejection and (2) rejection of metabolically produced CO2 to an environment with a ppCO2 of 0.4 to 0.9 kPa as is present on Mars. Portable...

Briefs: Physical Sciences
Variable Camber Aerodynamic Control Surfaces and Active Wing Shaping Control

A new concept of aircraft aerodynamic control surfaces has been developed in connection with another new concept of active wing shaping control for reducing aircraft drag that will result in less fuel burn. The first concept is referred to as a variable camber...

In order to study atmospheric or evolved gases, it is highly advantageous for an instrument (e.g. mass spectrometer (MS), thermal conductivity detector (TCD)) to simplify the gas stream with a...

Briefs: Software
360° Visual Detection and Object Tracking on an Autonomous Surface Vehicle

This software addresses the problem of an autonomous vehicle patrolling a region for objects of interest using multiple cameras. The system must identify and track the objects over time and localize their positions in the world. It implements an autonomous perception and...

Briefs: Physical Sciences
Simulation of Charge Carrier Mobility in Conducting Polymers

Electric conduction in polymers is one of the key elements in avoiding catastrophic internal electrostatic discharge in dielectrics during space missions. This software package enables the simulation of carrier mobility for any given site concentration, which is a material design...

Briefs: Software
Observational Data Formatter Using CMOR for CMIP5

The current software has been developed to work on NASA instrument datasets, an upgrade over similar software that only worked on datasets from climate model output. NASA is attempting to reformat satellite data to fit the specific and highly detailed data format and metadata requirements for...

Briefs: Information Technology
Examination and A Priori Analysis of a Direct Numerical Simulation Database for High-Pressure Turbulent Flows

A previously created direct numerical simulation (DNS) database of mixing of species under supercritical pressure has been examined and analyzed for the purpose of understanding the modeling requirements in the context of large eddy...

Briefs: Information Technology
Propellant Loading Physics Model for Fault Detection Isolation and Recovery

A Fault Detection, Isolation and Recovery (FDIR) system needs some internal concept of how the monitored system operates. This “operating concept” needs mathematical logic to represent the cause and effect relationship between constituent components of the system,...

Briefs: Information Technology
Probabilistic Guidance for Swarms of Autonomous Agents

Available guidance approaches for large numbers (i.e., swarms) of artificial agents are currently very limited. Swarms in nature (e.g., bees, birds, ants) typically contain hundreds to thousands of agents. The problem is how to mimic nature, and develop guidance laws for artificial (manmade)...

Briefs: Information Technology
Future Air-Traffic Management Concepts Evaluation Tool

In the United States, as many as 7,000 commercial and private aircraft may be in the air simultaneously at any given time and date, and the total number of commercial flights in a given 24-hour period generally exceeds 50,000. To maintain the safety and efficiency of air travel, this...

Briefs: Imaging
Reducing Drift in Stereo Visual Odometry

Visual odometry (VO) refers to the estimation of vehicle motion using onboard cameras. A common mode of operation utilizes stereovision to tri angulate a set of image features, track these over time, and infer vehicle motion by computing the apparent point cloud motion with respect to the cameras. It has...

Briefs: Imaging
Resource-Constrained Application of Support Vector Machines to Imagery

Machine learning techniques have shown considerable promise for automating common visual inspection tasks. For example, Support Vector Machine (SVM) classifiers that have been learned from labeled training data deliver strong detection performance both for finding human faces...

Since its inception, projection has been the dominant technology for displaying large, high-resolution images. Over the years, projectors have evolved to keep pace with advances in computer...

High-speed photography is as much of an engineering tool as an oscilloscope, spectrum analyzer, or logic analyzer. The photographic technique enables us to visualize and analyze motion, especially...

Robomotive and other humanoid robots equipped with 3D vision sensors are playing an increasing role in industrial automation, including in smaller binpicking set-ups where parts are...

Briefs: Imaging
Reducing Drift in Stereo Visual Odometry

Visual odometry (VO) refers to the estimation of vehicle motion using onboard cameras. A common mode of operation utilizes stereovision to tri angulate a set of image features, track these over time, and infer vehicle motion by computing the apparent point cloud motion with respect to the cameras. It has...

Briefs: Imaging
Technique for Finding Retro-Reflectors in Flash LIDAR Imagery

Orbital rendezvous and docking of two spacecraft is a topic of continued interest to NASA. For crewed missions, it is frequently the case that the target is cooperative (i.e., is equipped with some sort of navigation aid). If one of the relative navigation instruments is a Flash...

Briefs: Imaging
Novel Hemispherical Dynamic Camera for EVAs

A novel optical design for imaging systems is able to achieve an ultra-wide field of view (UW-FOV) of up to 208°. The design uses an integrated optical design (IOD). The UW-FOV optics design reduces the wasted pixels by 49% when compared against the baseline fisheye lens. The IOD approach results in a...

Articles: Photonics/Optics
Demystifying Spectroscopy

Spectroscopy techniques date back to Isaac Newton’s first studies of light and today provide researchers with a better understanding of what happens at the atomic and molecular level when matter interacts with...

Application Briefs: Photonics/Optics
Hyperspectral Imaging What is it? How does it work?

Hyperspectral imaging has grown increasingly popular over the past ten years in military, industrial, and scientific arenas. The ability to precisely characterize the color of a viewed...

Products: Photonics/Optics
White Light Measurement Solution

Hexagon Metrology (North Kingston, RI) has released WLS qFLASH, a compact white light solution (WLS), a non-contact, stereo vision system used to quickly capture 3D measurements on the shop floor. The...

Products: Photonics/Optics
Optical Coatings

L-3 Applied Optics Center (Dallas, TX), part of L-3 Communications, Warrior Systems, recently coated thirteen large optical elements for a major national telescope. The largest of the elements was over 27 inches in diameter...

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