Briefs: Mechanical & Fluid Systems
Two-Stage Centrifugal Fan

Fan designs are often constrained by envelope, rotational speed, weight, and power. Aerodynamic performance and motor electrical performance are heavily influenced by rotational speed. The fan used in this work is at a practical limit for rotational speed due to motor performance characteristics, and there is no more...

Briefs: Mechanical & Fluid Systems
Combined Structural and Trajectory Control of Variable-Geometry Planetary Entry Systems

Some of the key challenges of planetary entry are to dissipate the large kinetic energy of the entry vehicle and to land with precision. Past missions to Mars were based on unguided entry, where entry vehicles carried payloads of less than 0.6 T and landed...

Briefs: Materials
Temperature-Sensitive Coating Sensor Based on Hematite

A temperature-sensitive coating, based on hematite (iron III oxide), has been developed to measure surface temperature using spectral techniques. The hematite powder is added to a binder that allows the mixture to be painted on the surface of a test specimen. The coating dynamically changes...

Briefs: Materials
Detection of Carbon Monoxide Using Polymer-Carbon Composite Films

A carbon monoxide (CO) sensor was developed that can be incorporated into an existing sensing array architecture. The CO sensor is a low-power chemiresistor that operates at room temperature, and the sensor fabrication techniques are compatible with ceramic substrates.

Briefs: Materials
Substituted Quaternary Ammonium Salts Improve Low-Temperature Performance of Double-Layer Capacitors

Double-layer capacitors are unique energy storage devices, capable of supporting large current pulses as well as a very high number of charging and discharging cycles. The performance of double-layer capacitors is highly dependent on the nature...

Briefs: Materials
Standardization of a Volumetric Displacement Measurement for Two-Body Abrasion Scratch Test Data Analysis

A limitation has been identified in the existing test standards used for making controlled, two-body abrasion scratch measurements based solely on the width of the resultant score on the surface of the material. A new, more robust method is...

Briefs: Materials
Sustainably Sourced, Thermally Resistant, Radiation Hard Biopolymer

This material represents a breakthrough in the production, manufacturing, and application of thermal protection system (TPS) materials and radiation shielding, as this represents the first effort to develop a non-metallic, nonceramic, biomaterial-based, sustainable TPS with the...

Future astrophysics and planetary experiments are expected to require large focal plane arrays with thousands of detectors. Feedhorns have excellent performance, but their mass, size,...

Briefs: Physical Sciences
Validating Phasing and Geometry of Large Focal Plane Arrays

The Kepler Mission is designed to survey our region of the Milky Way galaxy to discover hundreds of Earth-sized and smaller planets in or near the habitable zone. The Kepler photometer is an array of 42 CCDs (charge-coupled devices) in the focal plane of a 95-cm Schmidt camera onboard...

Briefs: Physical Sciences
180-GHz Interferometric Imager

A 180-GHz interferometric imager uses compact receiver modules, combined high- and low-gain antennas, and ASIC (application specific integrated circuit) correlator technology, enabling continuous, all-weather observations of water vapor with 25-km resolution and 0.3-K noise in 15 minutes of observation for...

Briefs: Physical Sciences
Maturation of Structural Health Management Systems for Solid Rocket Motors

Concepts of an autonomous and automated space-compliant diagnostic system were developed for conditioned- based maintenance (CBM) of rocket motors for space exploration vehicles. The diagnostic system will provide real-time information on the integrity of critical...

Briefs: Information Technology
Achieving Exact and Constant Turnaround Ratio in a DDS-Based Coherent Transponder

A report describes a non-standard direct digital synthesizer (DDS) implementation that can be used as part of a coherent transponder so as to allow any rational turnaround ratio to be exactly achieved and maintained while the received frequency varies. (A coherent...

Briefs: Information Technology
Surface Modeling to Support Small-Body Spacecraft Exploration and Proximity Operations

In order to simulate physically plausible surfaces that represent geologically evolved surfaces, demonstrating demanding surface-relative guidance navigation and control (GN&C) actions, such surfaces must be made to mimic the geological processes themselves. A...

One of the advantages resulting from a slow economy is the increased scrutiny placed on reducing expenses and improving efficiency. This has been the case during the past few years in the...

Articles: Sensors/Data Acquisition
Grand Prize Winner

Monika Weber, Christopher Yerino, Hazael Montanaro, Kane Siu Lung Lo, and Mark Reed, Yale University, New Haven, CT

Every year, food-borne bacteria cause thousands of infections in humans and animals. Outbreaks of...

Application Briefs: Sensors/Data Acquisition
Sensors Measure Vibroacoustic Shock During Launches
G-Link®, SG-Link®, WSDA®, and SensorCloud® wireless sensor components
MicroStrain
Williston, VT
802-862-6629
www.microstrain.com

MicroStrain provided NASA...

Application Briefs: Sensors/Data Acquisition
Data Acquisition System Monitors Lightning Strikes
Genesis HighSpeed data acquisition system and Perception software
HBM
Marlboro, MA
508-624-4500
www.hbm.com

NASA Kennedy Space Center, based in Cape Canaveral, FL,...

Articles: Research Lab
John C. Stennis Space Center

In the 1960s, NASA’s John C. Stennis Space Center, all but hidden away in the piney woods of south Mississippi, built a reputation of excellence in testing the massive first and second stages of the Saturn...

The single-photon counting imaging sensor is typically an array of silicon Geiger-mode avalanche photodiodes that are monolithically integrated with CMOS (complementary metal oxide...

Briefs: Photonics/Optics
Qualification of Fiber Optic Cables for Martian Extreme Temperature Environments

Means have been developed for enabling fiber optic cables of the Laser Induced Breakdown Spectrometer instrument to survive ground operations plus the nominal 670 Martian conditions that include Martian summer and winter seasons. The purpose of this development was...

Briefs: Photonics/Optics
Transverse Pupil Shifts for Adaptive Optics Non-Common Path Calibration

A simple new way of obtaining absolute wavefront measurements with a laboratory Fizeau interferometer was recently devised. In that case, the observed wavefront map is the difference of two cavity surfaces, those of the mirror under test and of an unknown reference surface...

Briefs: Physical Sciences
Solid-State Spectral Light Source System

A solid-state light source combines an array of light-emitting diodes (LEDs) with advanced electronic control and stabilization over both the spectrum and overall level of the light output. The use of LEDs provides efficient operation over a wide range of wavelengths and power levels, while electronic...

Everywhere we look we are bombarded with 3D. It’s in movies, in-home entertainment, digital camcorders, gaming systems, laptops, and even in our labs. What is it about 3D that is so...

Application Briefs: Photonics/Optics
Creating 3D Terrain Maps from 2D Data

Disaster relief workers, border patrol officers, wildfire fighters, and many others need up-to-date information about what they will see when they enter an area, not just sketchy topographic maps that...

Agilent Technologies (Santa Clara, CA) has introduced a compact tunable laser module for its 816x Series lightwave measurement platform. The Agilent 81960A module, which features a 200 nm/s...

Products: Photonics/Optics
High-Dynamic-Range Read Out Circuit

The NSC1101 from New Imaging Technologies (NIT) Corp. (Verrières le Buisson, France) is a high-dynamic-range read out circuit (ROIC) designed to interface with photodiode arrays. The NSC1101 has a VGA...

Products: Photonics/Optics
Test-and-Measurement Platform

New Ridge Technologies (Owings Mills, MD) has announced the expansion of its NRT-2500 product line to include the TruePhase IPLM Inline Polarimeter from OFS (Norcross, GA). The NRT-2500, a polarization control...

Products: Photonics/Optics
Green Laser Diode Modules

Power Technology (Little Rock, AR) offers a 515-nm, 20-mW green laser diode module. The laser modules have been created specifically to address the needs of high-end OEM applications requiring ultra-stable...

Products: Photonics/Optics
Linear-Array PMT Modules

Linear Array Photomultiplier tube (PMT) modules from Hamamatsu Corporation (Bridgewater, NJ) offer high cathode sensitivity, high gain, and high-speed response. The H11451 series features 8 channels in a linear...

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