List

The final product is Cyberchase Fractions Quest—a math game based on the storyline of PBS children's television series, Cyberchase. In the game, students in grades 3 and 4 will apply learning fractions within three contexts: areas and regions (such as shapes), sets (groups of objects), and on a number line. The game will identify specific areas where students struggle and will introduce challeng ...

The unique electronic properties of periodically-arranged indium arsenide/gallium antimonide (InAs/GaSb) mesas in the type-II strained layer superlattices (SLS) make them a superior alternative to the conventional HgCdTe sensors for longwave infrared focal plane array (LWIR FPA) detectors. However, despite the highly promising quantum structures of SLS, its performance is currently limited by high ...

We intend to dramatically improve the performance of the Standardized Atmosphere Generator (SAG), an environmental background model used to characterize the atmospheric state. SAG combines multiple empirical models, including NRL-MSISE-00, URAP, NRL climatology, AFGL atmospheric profiles, SNOE databases, the International Reference Ionosphere, and photochemical and empirical models developed by S ...

Over many data collection campaigns, a large number of propulsion related signature events have been observed across an extended range of the electromagnetic spectrum. The current suite of plume modeling tools contains the basic framework for flowfield and signature generation, but lacks the underlying physical mechanisms and supporting property databases to properly account for alternate waveband ...

Physical Sciences Inc. (PSI) proposes to utilize a ground-based simulation facility based upon its patented FAST technology to obtain critical data necessary to validate and extend the capabilities of the MDAs high altitude plume code: SOCRATES-P. Far-field plume signatures arise from the hyperthermal interaction of rocket plume effluent with the atmosphere at altitudes greater than 100 km. In P ...

The modeling & simulation (M&S) tools currently used by the Missile Defense Agency (MDA) to simulate radiofrequency (RF) propagation effects on ballistic missile defense (BMD) radar performance produce medium-to-high fidelity results. However, these tools do not incorporate all relevant RF propagation phenomena, assess propagation effects on radar system performance, or support real-time simulatio ...

MDA Model and Simulation capabilities include Core Truth models capable of simulating all physics governing missile detection, tracking and intercept events. A key component of the simulation tools is an accurate and fast atmospheric radiation model to describe the target signal propagation through the atmosphere to the sensor. Such a model should be designed to readily interface with existing sc ...

TBD

This work addresses the design, development, and testing of a spectral sensor package, which can be inserted in the aft section of a re-entry vehicle (RV) to provide detailed spectral measurements of wakes and plumes. The resulting near-field spectral data will improve our understanding of the basic phenomena that impact performance and observability. Insertion of the package within the RV allows ...

Currently, optical measurements available on target plumes and re-entry wakes are collected by air or ground assets which view the wake/plume photons after having been filtered through the atmosphere. Atmospheric transmission removes significant information needed to anchor models that simulate these phenomena. MDA needs innovative approaches to mount a spectrometer on the aft closure of the RV. ...