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Briefs: Information Technology
Whole Symbol Moments SNR Estimator Analysis and Implementation
A data-dependent algorithm was developed for estimating symbol signal-to-noise ratio (SNR) with a non-integral number of samples per symbol. The classical split symbol SNR estimator algorithm was adapted to incorporate the whole symbol by removing the data polarity.
Briefs: Information Technology
The communication between NASA space mission operations teams and their respective spacecraft in outer space is accomplished via the Deep...
Briefs: Information Technology
A spacecraft high-gain antenna (HGA) was designed with a sharp Vnotch in its far-field cross-pole pattern to determine the spacecraft...
Briefs: Materials
Puncture Self-Healing Polymer for Aerospace Applications
A document discusses a puncture self-healing polymer for space exploration that is capable of puncture healing upon impact. Puncture healing occurs instantaneously, providing mechanical property retention in lightweight structures.
Briefs: Aerospace
Quick Thrust Profile Design Analysis for Verifying Spacecraft Operational Capabilities
A paper describes a process for imposing safety constraints on a spacecraft trajectory design. The conventional process has the ACS (Attitude Control System) team define geometric constraints, then the NAV (Navigation) team produces a compliant thrust direction...
Briefs: Information Technology
Co-Optimized, Blunt-Body Re-entry Vehicle Design Process
A document describes a design optimization method for determining optimal shapes for vehicles with mid-range lift-to-drag ratios that are entering or re-entering planetary atmospheres. The design space includes consideration of hypersonic aerothermodynamic properties (for minimizing heating)...
Briefs: Physical Sciences
COEDI Instrument Design Development for the GEOCAPE Mission
A document describes a coastal ocean color instrument for geostationary orbit that meets the science requirements within a size, mass, and cost package that is acceptable within current budgetary constraints. This work advances the instrument design concept for the Coastal Ocean Ecosystem...
Briefs: Information Technology
Numerical Evaluation of Near-Hypersingular Integrals
A document discusses a method for simple and efficient numerical integration (quadrature) of integrals characterized by a near-hypersingularity. Near-hypersingular integrals arise in gradients of Newton-type potentials when the fields at a desired observation point are close to the source. The...
Briefs: Physical Sciences
Intercalibration of Measurements from Microwave Sensors
A study discusses a robust intercalibration technique using a well validated radiative transfer code that can be applied to the higher-frequency sounding channels for the NASA Global Precipitation Measurement (GPM) mission. Intercalibration of these high-frequency sounding channels will...
Briefs: Lighting
The ultimate challenge in the race to miniaturize light emitting diodes (LED) has finally been met. A team led by the Institut de Physique et de Chimie des Matériaux de Strasbourg (IPCMS, CNRS/Université de...
Briefs: Lighting
A team of MIT researchers has used a novel material that’s just a few atoms thick to create devices that can harness or emit light. This proof-of-concept could lead to ultra-thin,...
Briefs: Lighting
Improving the Efficiency of Green-Blue-Ultraviolet Light-Emitting Diodes
Scientists at the U.S. Naval Research Laboratory (NRL) have suggested a method that could significantly increase the efficiency of green-blue-ultraviolet light-emitting diodes based on GaInN/GaN, AlGaN/GaN, and AlInN/GaN quantum wells. Their approach could enable advances in...
Briefs: Physical Sciences
A powerful tool in understanding the role that greenhouse gasses play in climate change would be real-time data from laser chemical sensors providing concentrations and locations of...
Briefs: Information Technology
Adaptive Periodic-Correlation Algorithm for Shack-Hartmann Wavefront Sensing
Conventional Shack-Hartmann Wavefront Sensing requires a point source such as a star to perform wavefront sensing. This software allows one to conduct such sensing using an extended-scene or scene-based image. The software allows a Shack-Hartmann Wavefront Sensor (SH-WFS)...
Briefs: Sensors/Data Acquisition
In Situ Health Monitoring of Piezoelectric Sensors
On occasion, anomalies in the highly dynamic test data obtained during rocket engine tests may appear. These issues must be investigated, and corrective action is generally mandated before testing resumes; usually only three days are allotted to identify and correct the issues. Spurious signals in...
Briefs: Sensors/Data Acquisition
The current radio infrastructure for firefighters provides voice communications, but does not support data transfer capability for continuous monitoring of people...
Briefs: Sensors/Data Acquisition
Car air conditioners operate in all seasons to keep the cabin temperature cool in summer and warm in winter. In summer, for air conditioning systems without humidity sensors,...
Briefs: Manufacturing & Prototyping
Self-Aligning Lug for Adapting Carbon Fiber Rods to a Bolted Metallic Connection
The enormous strength of unidirectional carbon fiber composite rods is difficult to take advantage of at their ends because of inadequate joining technology. Bolting does not work with unidirectional composites, and bonding is difficult due to stiffness mismatches...
Briefs: Manufacturing & Prototyping
Growth Method for Chalcongenide Phase-Change Nanostructures
Recently, one-dimensional (1-D) nanostructures such as nanowires and nanotubes have become the focal point of research in nanotechnology due to their fascinating properties. These properties are intrinsically associated with low dimensionality and small diameters, which may lead to unique...
Briefs: Electronics & Computers
This electronic device is designed to provide optimal control of an electromagnetically actuated shutter used on a digital or photographic camera. The SD36B1 Electromechanical Shutter Driver...
Briefs: Semiconductors & ICs
Sub-Nanosecond, Compact, Low-Power Time-Interval Measurement
This innovation is a sub-nanosecond time-interval measurement that is compact and inexpensive, implemented in a field-programmable gate array (FPGA). Currently, high-speed count ers or semi-custom or custom ASICs (application specific integrated circuits) are used for time-interval...
Briefs: Electronics & Computers
A vehicle electronic control unit consists of various high-side power stages for driving different loads. Common faults that these power stages experience are Short Circuit to...
Briefs: Materials
Dispersion of Carbon Nanotubes Into Polymer Matrices to Produce Unique Properties
The present invention addresses the effective dispersion of carbon nanotubes (CNTs) into polymer matrices. The nanocomposites are prepared using polymer matrices and exhibit a unique combination of properties, most notably, high retention of optical transparency in...
Briefs: Materials
Carbon Nanotube Growth Density Control
This method provides control over the growth density of carbon nanotubes (CNTs) on a relatively coarse scale, with density adjustment over several orders of magnitude, using an applied electrical field or voltage difference that is aligned substantially perpendicular to the substrate surface, which is adjacent...
Briefs: Materials
Pulsed Plasma Lubricator (PPL) Technology for the In Situ Replenishment of Dry Lubricants in Extreme Environments
NASA missions employing mobility systems and other moving mechanical assemblies for application on Mars, the Moon, and in deep space depend on the reliable operation of these assemblies and their tribological components. Wet lubricants...
Briefs: Materials
Long-Life, Hydrophilic, Antimicrobial Coating for Condensing Heat Exchangers
Future manned spacecraft and lunar or Mars outposts will need a condensing heat exchanger (CHX) to control humidity in the cabin atmosphere. Condensing surfaces must be hydrophilic to control condensate flow and ensure efficient operation in zero gravity, and biocidal to...
Briefs: Materials
Opposed Pad Gecko Adhesive Gripper for On-Off Omnidirectional Anchoring/Gripping in Orbit
The idea of turning the stickiness of a material on and off is not an intuitive concept, yet this is exactly how geckos run up walls at speeds greater than 1 m/s and cling to ceilings made of glass. Transitioning this capability to spacecraft would constitute...
Briefs: Materials
Complex Geometry Multi-Use Coatings for Abrasion Prevention, Wear Resistance, and Lunar Dust Removal
Two coatings are required to remove/repel lunar dust particles from the mechanism or surface that needs protection. One coating must be a conductor, and one must be a dielectric. Tungsten carbide (WC) and aluminum oxide (Al2O3) were found to be best...
Briefs: Mechanical & Fluid Systems
Smart Core-Bit Probe (SCOPe) employs ruggedized MEMS-based sensors for real-time monitoring of sample core integrity (compositional or morphological changes) and drill health during sample acquisition. SCOPe enables...
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