Physical Sciences


Briefs: Physical Sciences
Preparation, Planning, and Concept Demo of a Technique to Find ≈7-to-10-m Near Earth Asteroids

A paper describes a new technique designed to increase significantly the sensitivity for finding and tracking small, dim, and fast-moving near Earth...

Briefs: Physical Sciences
Strobing to Mitigate Vibration for Display Legibility

This method mitigates the motion blur introduced when a display, and/or the operator reading it, is undergoing vibration (e.g. during the launch phase of spaceflight). If both the operator and...

Briefs: Physical Sciences
Imaging Space System Architectures Using a Granular Medium as a Primary Concentrator

Typically, the cost of a space observatory is driven by the size and mass of the primary aperture. Generally, a monolithic aperture is much heavier and complex to...

Briefs: Physical Sciences
Image Processing Method To Determine Dust Optical Density

Image processing techniques for determining dust optical density in Apollo videos have been developed. The software generates histograms, and calculates the mean and standard deviation,...

Briefs: Physical Sciences
Vibration and Thermal Cycling Apparatus for Cryogenic Tanks

Understanding thermal and mechanical behaviors and their inter-dependencies of complex tank systems is crucial to making proper design decisions. Low-maintenance, high-performance systems...

Briefs: Physical Sciences
Integrated Rate Isolation Sensor

Some vehicles use an internal measurement unit (IMU) system to determine the speed, acceleration, orientation, position, and/or direction of movement of the vehicle. Vehicles used for high-availability or...

Briefs: Physical Sciences
Mercury-Cadmium-Telluride Focal Plane Array for Warm Alignment of Imaging Spectroscopy Systems

A new technique allows a mercury-cadmium-telluride (MCT) focal plane array (FPA) to operate at room temperature. These results were obtained through...

Briefs: Physical Sciences
Enhanced Auditory Alert Systems

Auditory warning systems for human interfaces are often designed around criteria that depend primarily upon signal loudness. It is well understood from the auditory literature that, by making an alert signal...

Briefs: Physical Sciences
Carbon Monoxide Silicate Reduction System

Oxygen produced from lunar resources is a very desirable product to greatly reduce the mass lifted from the Earth’s surface in support of exploration activities. The ability to obtain high yields of...

Briefs: Data Acquisition
Real-Time Minimization of Tracking Error for Aircraft Systems

In many cases when an aircraft/spacecraft vehicle encounters a failure (such as a jammed control or loss of a part), there are still enough redundant actuation mechanisms to safely...

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