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Welkin Sciences proposes investigating scintillation-hardening techniques applicable to DoD's strategic communication systems, focusing on hardening specific SATCOM links within the Ballistic Missile Defense System Communications Network that are of particular interest to DTRA and its customer, the Missile Defense Agency (MDA). These new scintillation-hardening techniques are based on computationa ...

Welkin Sciences proposes to design and build a new fading channel simulator to be called the All-Digital Configu­rable Link Test Set (CoLTS–AD). It will be capable of emulating the full range of MIL-STD-3053 scintillating channel conditions needed to test all of DoD’s strategic communication systems. CoLTS–AD will support developmental and ac­ceptance testing of conventional communication ...

TDA Research, Inc. (TDA), designed, built, and tested a dense array of 100 very low cost infrasonic sensors. Due to their low cost (1/100x-1/10x the cost of other infrasound sensors), they can be economically deployed in very large numbers; such large arrays can gather more information than a few expensive sensors. They are sensitive from 0.1 Hz - 100 Hz down to 0.08 Pa. We tested the sensors in s ...

During Phase I and a first Phase II, Welkin Sciences developed the Channel Realization Generator (CReG) algorithm, an enhanced functional replacement for the ACIRF code intended to be embedded into software link simulations and HWIL fading channel simulators. The proposed second Phase II effort will refine the CReG documentation and its software and firmware implementations. Many in the strategic ...

Micro-RDC has developed portable radiation effects test structures that scale to new process nodes.These structures will enable the investigation of the effects of radiation on the new technology from the material processing level as well as the circuit level.Fabricating the chosen structures and the refinement of software to extract the model parameters will be completed in this effort.A suite of ...

The proposed Complex Realization Generator (CReG) provides a real-time and software-based functional alternative to the Antenna-Complex Impulse Response Function (ACIRF) code. CReG generates fading channel realizations for the entire range of channel models represented by DTRA's Generalized Power Spectral Density (GPSD).

It is challenging to detect CBRN weapons production facilities that are hidden in residential and industrial neighborhoods. Once the weapons are manufactured, they will be sealed and removed from the site of production, so developing techniques to reveal the presence of the weapons will likely be fruitless. In this project, we will develop indicators that can be applied covertly around suspected w ...

In this proposed Phase II program we will build on the successful Phase I program where we for the first time implemented engineered epitaxial layers based on nanostructure technology that were used to harden commercial silicon devices against radiation by minimizing collected photocurrents (electron-hole pairs) via recombination centers where we demonstrated that improved radiation hardness could ...

As technology feature sizes decrease, single event upset (SEU), digital single event transient (DSET), and multiple bit upset (MBU) effects dominate the radiation response of microcircuits. Recent test circuits and test methods have quantified the pulse widths of DSETs generated from heavy-ion strikes on critical microcircuit nodes. These pulse widths have proven to be much larger than previousl ...