Award Data

LWIR is well suited for free space communications because of its atmospheric window and low scattering by dust, precipitation, and fog. Due to recent developments of QCLs, the technology is poised to provide the high speed LWIR transmitter for such a free space communication system. However, a corresponding advance in LWIR detectors for the high-speed receiver is needed. The specifics of the LWIR ...

ABSTRACT: In this work, an ephemeral security technique for keying military GPS receivers will be developed. This work will not modify the existing GPS cryptographic structure, but rather develop an overlay for providing keying information to a receiver in a manner that makes all security information ephemeral, eliminating the permanent storage of CPI within the receiver. Existing and emerging bat ...

ABSTRACT: The objective of this solicitation is to develop real-time automatic scaling software for oblique ionograms (OIs).In Phase I, using recently developed mathematical concepts of sparsity and fractional norms, we have developed a novel method for detecting the desired trace data and determining whether a given point is an ordinary magnetoionic mode (O) or an extraordinary mode (X) while red ...

The Air Force faces challenges related to selecting, maintaining and repairing coatings that protect and enhance the performance of critical components in gas turbine engines. Coatings must maintain performance despite experiencing several degrading mechanical, thermal and chemical impacts.In Phase I, CFDRC demonstrated feasibility of a physics-based model to compute damage progression under stres ...

Infrared devices fabricated using III-V strained-layer superlattice (SLS) materials have many advantages over present state-of-the-art HgCdTe detectors, e.g., cost, manufacturability, operability, and theoretically lower Auger generation rates. However, due to the presence of inherent growth related defects the SLS materials have not achieved full potential. While growth improvements are anticipat ...

Abstract: Electromagnetic signals used in communications and sensor systems can be seriously impacted after propagation through a region of the atmosphere or ionosphere disturbed by turbulence.This work will develop new physics-based technology that calculates EM propagation from HF to laser frequencies, including the effects of turbulence with long correlation length in the direction of propagati ...

EO/IR sensors can provide high spatial resolution images using multiple frequency bands ranging from the visible to mid-wave IR. EO/IR sensors have been very successful for terrain imaging from subsonic aircraft and from satellites. Imaging using these platforms has been studied extensively. EO/IR sensors can provide high spatial resolution images using multiple frequency bands ranging from the v ...

Next-generation turbulent combustion models must enable accurate prediction of lean blow-out and flashback for complex geometries, fuels and operating conditions relevant to the Air Force. Improved models are needed to better predict kinetically and hydr...

The state-of-the-art in infrared scene projection uses micro-machined resistor arrays. While a proven technology, these arrays are limited in frame-rate and dynamic range, and can be prohibitively costly as array size increases. Alternative technologies ...

ABSTRACT: Comprehensive assessment and rigorous documentation of a customized fiber optic coupled laser system suitable for installation into the AEDC Aerodynamic and Propulsion Test Unit (APTU) Combustion Air Heater (CAH) was completed.  Phase I concluded fundamental fuel injection and combustion stability enhancement improvements are immediately required to assure robust ignition operation with ...