Briefs: Information Technology
Optimal Control Via Self-Generated Stochasticity

The problem of global maxima of functionals has been examined. Mathematical roots of local maxima are the same as those for a much simpler problem of finding global maximum of a multi-dimensional function. The second problem is instability — even if an optimal trajectory is found, there is no...

Briefs: Information Technology
Surface Contact Model for Comets and Asteroids

A contact force model was developed for use in touch and go (TAG) surface sampling simulations on small celestial bodies such as comets and asteroids. In TAG scenarios, a spacecraft descending toward the surface of a small body comes into contact with the surface for a short duration of time,...

Briefs: Mechanical & Fluid Systems
Dust Mitigation Vehicle

A document describes the development and demonstration of an apparatus, called a “dust mitigation vehicle,” for reducing the amount of free dust on the surface of the Moon. The dust mitigation vehicle would be used to pave surfaces on the Moon to prevent the dust from levitating or adhering to surfaces.

Briefs: Materials
Optical Coating Performance for Heat Reflectors of the JWST-ISIM Electronic Component

A document discusses a thermal radiator design consisting of lightweight composite materials and low-emittance metal coatings for use on the James Webb Space Telescope (JWST) structure. The structure will have a Thermal Subsystem unit to provide passive cooling...

Briefs: Information Technology
SpaceCube Demonstration Platform

A document discusses how the HST SM4 SpaceCube flight spare was modified to create an experiment called the SpaceCube Demonstration Platform (SC DP) for use on the MISSE7 Space Station payload (in collaboration with NRL). It is designed to serve as an on-orbit platform for demonstrating advanced fault tolerance...

Briefs: Physical Sciences
Aperture Mask for Unambiguous Parity Determination in Long Wavelength Imagers

A document discusses a new parity pupil mask design that allows users to unambiguously determine the image space coordinate system of all the James Webb Space Telescope (JWST) science instruments by using two out-of-focus images. This is an improvement over existing...

Briefs: Physical Sciences
Spaceflight Ka-Band High-Rate Radiation-Hard Modulator

A document discusses the creation of a Ka-band modulator developed specifically for the NASA/GSFC Solar Dynamics Observatory (SDO). This flight design consists of a high-bandwidth, Quadriphase Shift Keying (QPSK) vector modulator with radiation-hardened, high-rate driver circuitry that...

Briefs: Medical
Enabling Disabled Persons To Gain Access to Digital Media

A report describes the first phase in an effort to enhance the NaviGaze software to enable profoundly disabled persons to operate computers. (Running on a Windows-based computer equipped with a video camera aimed at the user’s head, the original NaviGaze software processes the user’s...

Articles: Sensors/Data Acquisition
Protecting Signal Integrity in Industrial Environments

Data communications in industrial environments can present special problems. Lines must be run over long distances, often ranging from thousands of feet to several miles, indoors and...

Creo Direct v17 modeling design software
PTC Corp.
Needham, MA

There are several robotic arms on the International Space...

Application Briefs: Electronics & Computers
Network Connectivity Enables Climate Research
Summit® X650 40-GbEswitch
Extreme Networks
Santa Clara, CA

Some of the largest data sets in existence are related to weather research, and...

Articles: Sensors/Data Acquisition
Goddard Space Flight Center

Goddard Space Flight Center’s (GSFC) primary role is to develop science and technology to support unmanned missions to study the Earth, Sun, solar system, and universe. GSFC is responsible for several of...

NASA needs a sensor system to characterize damage from Micro-meteoroid and Orbital Debris (MMOD), corrosion, or to perform configuration verification when there...

Generally speaking, sensor manufacturers are driven to improve performance (i.e. offering greater sensitivity, smaller packages, more features) and lower costs. The prioritization of these...

New high definition (HD) television cameras are being integrated into industrial environments to assist in the inspection of a variety of manufactured products. HDTV technology is...

Spaceflight system electronic devices must survive a wide range of radiation environments with various particle types including energetic protons, electrons,...

A test port designed as part of a fiber-optic-coupled laser altimeter receiver optical system allows for the back-illumination of the optical system for alignment verification, as well as...

Briefs: Physical Sciences
Phase Retrieval System for Assessing Diamond Turning and Optical Surface Defects

An optical design is presented for a measurement system used to assess the impact of surface errors originating from diamond turning artifacts. Diamond turning artifacts are common by-products of optical surface shaping using the diamond turning process (a...

Products: Photonics/Optics
Product of the Month - White Light Sensor

Hexagon Metrology (North Kingston, RI) has announced the manual Cognitens WLS400M and the automated Cognitens WLS400A measurement systems. The white light measurement products use digital stereo...

Products: Photonics/Optics
Thermal Imager

NEC Avio Infrared Technologies (San Fernando, CA) has introduced its InfReC R300 high-definition thermal imager, which includes thermal movie recording to SD card in radiometric format, thermal/visible integrated images in...

Products: Photonics/Optics
CMOS Linear Image Sensor

The S11108 CMOS linear image sensor from Hamamatsu Corp. (Bridgewater, NJ) offers sensitivity of 50 V/(lx•s). An amplifier is embedded in each pixel of the CMOS sensor. The S11108, which features a spectral...

Products: Photonics/Optics
CW Diode Laser Modules

Coherent (Santa Clara, CA) has expanded its CUBE product line of CW, visible diode laser modules with three new wavelengths: 488nm (50 mW), 685nm (40 mW), and 730nm (30 mW). The compact CUBE laser heads measure...

Products: Photonics/Optics
LED Driver ICs

Power Integrations (San Jose, CA) has added seven LED driver ICs to its LinkSwitch-PH line. The ICs (LNK413-LNK419) are suitable for lighting applications ranging from 3W bulbs to 55W fluorescent lighting fixture...

Products: Photonics/Optics
Optical Module Controller

Maxim Integrated Products (Sunnyvale, CA) has introduced the DS1878, a small form factor pluggable (SFP+) controller with a digital laser diode driver (LDD) interface. The state-machine-based device controls...

Products: Photonics/Optics
4-Leaded RGB LED

Lumex (Palatine, IL) has announced the global launch of the through-hole QuasarBrite 4-Leaded RGB LED. With a 120° viewing angle, the QuasarBrite 4-Leaded RGB LED is ideally suited for applications that require high...

Products: Photonics/Optics
Optical Filters for Avionics

Precision Glass & Optics (PG&O) (Santa Ana, CA) announces the design and development of custom optical filters for PRP Optoelectronics (Towcester, England), independent manufacturer of LED-based display...

Products: Photonics/Optics
Photovoltaic Metallization Paste

DuPont Microcircuit Materials (MCM) (Research Triangle Park, NC) has introduced DuPont™ Solamet® PV701 photovoltaic metallization paste, a Metal Wrap Through (MWT) technology for back side...

Products: Photonics/Optics
Bandpass Filters

REO (Boulder, CO) currently offers bandpass filters for operation in the visible (380nm — 760nm), near infrared (600nm — 1100nm), and mid-infrared (1.3μm — 2.6μm) spectral ranges. Nominal bandwidth is 1%...

Products: Photonics/Optics
Laser Modules

Lasers1 (Westwood, CA) now offers a new line of diode-based and DPSS- based laser modules, laser pointers, and hand-held lasers, available at wave- lengths between deep-UV (224nm) and near-IR (2240nm). The products...

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